Muhammad Faqih Ibrahim - Academia.edu (original) (raw)

Papers by Muhammad Faqih Ibrahim

Research paper thumbnail of An Improved Ant Colony Optimization Algorithm for Vehicle Routing Problem with Time Windows

Jurnal Teknik Industri

Distribution plays an important role in the supply chain system. One of the critical problems in ... more Distribution plays an important role in the supply chain system. One of the critical problems in distribution is the vehicle routing problem. This research proposes the Improved Ant Colony Optimization (IACO) algorithm to solve the Vehicle Routing Problem with Time Windows (VRPTW). The main objective is to minimize the total vehicle mileage by considering the vehicle capacity and customer time windows. The proposed IACO algorithm is inspired by the conventional Ant Colony Optimization (ACO) algorithm by adding local search and mutation processes. Numerical experiments were conducted to test that the routes generated did not violate the customer's time window constraints. In addition, this study also compares the proposed IACO algorithm routes with other metaheuristic algorithms, namely ACO classic and Tabu Search. In addition, this investigation was carried out by experimenting with the number of iterations. The results of numerical experiments prove that the proposed IACO algor...

Research paper thumbnail of Numerical Investigation of Flow and Dispersion over Two-Dimensional Semi-Open Street Canyon

CFD Letters

A semi-open street canyon is able to protect pedestrians from unpleasant situations such as direc... more A semi-open street canyon is able to protect pedestrians from unpleasant situations such as direct sunlight and rain. However, the protruding elements of the two opposite building facades that form the semi-open configuration can affect the air quality of the urban canopy layer (UCL). Therefore, this paper investigated the influence of the eave structures on the flow and pollutant dispersion over an idealized 2D street canyon with a unity aspect ratio. The length of the eaves was varied into 0.25H and 0.5H (H is the building height) and placed either on the leeward wall, the windward wall, or on both building facades located at the same elevation as the street canyon. Numerical simulations were performed using the steady-state Reynolds-averaged Navier-Stokes (RANS) equations in conjunction with Re-Normalization Group (RNG) k-ε as the turbulence closure model. The pollutant was released from a line source in the center of the bottom of the target canyon with uniform flow rate. Six di...

Research paper thumbnail of Implementation of Open-Source ERP-Based Fleet Management System on SMEs Transportation Service Provider

Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi)

Enterprises Resource Planning (ERP) systems can be analogized as the backbone of the information ... more Enterprises Resource Planning (ERP) systems can be analogized as the backbone of the information system in a company. Many large-scale companies have adopted ERP systems to increase efficiency in the company's business processes. This research departs from the issue of Small and Medium Enterprises (SMEs) that are required to use ERP to compete in the global market but cannot implement an ERP system at a high cost. However, SMEs have financial limitations in adopting high-cost ERP systems. On the other hand, many open-source ERP systems can currently be used for free but with a limited number of modules. This study focuses on implementing an open-source ERP system using Odoo software version 15 on SMEs Transportation Services Providers. The goal is to develop an open-source ERP-based fleet management system for SMEs. The system developed successfully met the company's managerial expectations. All processes previously carried out manually have been carried out using the develo...

Research paper thumbnail of A Three-Phased Perishable Inventory Simulation Model with Quality Decrease Consideration

Jurnal Ilmiah Teknik Industri, 2020

In this article, focus on the simulation of a three-phase perishable product inventory system of ... more In this article, focus on the simulation of a three-phase perishable product inventory system of a SMEs selling fresh and processed milkfish. This research was conducted to simulate a perishable product inventory system to understand and analyze the problems that occur then propose solutions to fix them. The simulation model was developed with ARENA software, simulation results of the existing condition show that there is 162 kg/month waste in fresh fish, 158 pcs/month in processed product A, and 86 pcs/month in processed product B. A model with a product renewal process mechanism was proposed to overcome this problem, and seven improvement scenarios were developed. The results obtained from the seventh improvement scenario revealed that there was a 100% reduction in fresh fish and processed product B and 94% in processed product A. Besides, there was a saving in need for fresh fish supply of 10 kg/day. In this article, we show how ARENA software can be adopted to simulate inventory...

Research paper thumbnail of An effective hybrid ant lion algorithm to minimize mean tardiness on permutation flow shop scheduling problem

International Journal of Advances in Intelligent Informatics, 2020

This article aimed to develop an improved Ant Lion algorithm. The objective function was to minim... more This article aimed to develop an improved Ant Lion algorithm. The objective function was to minimize the mean tardiness on the flow shop scheduling problem with a focus on the permutation flow shop problem (PFSP). The Hybrid Ant Lion Optimization Algorithm (HALO) with local strategy was proposed, and from the total search of the agent, the NEH-EDD algorithm was applied. Moreover, the diversity of the nominee schedule was improved through the use of swap mutation, flip, and slide to determine the best solution in each iteration. Finally, the HALO was compared with some algorithms, while some numerical experiments were used to show the performances of the proposed algorithms. It is important to note that comparative analysis has been previously conducted using the nine variations of the PFSSP problem, and the HALO obtained was compared to other algorithms based on numerical experiments.

Research paper thumbnail of Mechanical properties of magnesium alloys for medical application: A review

Journal of the mechanical behavior of biomedical materials, Jan 21, 2018

Magnesium alloys as a class of biodegradable metals have great potential to be used as implant ma... more Magnesium alloys as a class of biodegradable metals have great potential to be used as implant materials, which attract much attention. In this review, the mechanical properties of magnesium alloys for medical applications are summarized. The methods to improve the mechanical properties of biodegradable magnesium alloys and the mechanical behaviors of Mg alloys in biomedical application are illustrated. Finally the challenges and future development of biodegradable magnesium alloys are presented.

Research paper thumbnail of Biofunctional Mg coating on PEEK for improving bioactivity

Bioactive materials, 2018

High purity Mg was successfully coated on polyetheretherketone (PEEK) by vapor deposition method ... more High purity Mg was successfully coated on polyetheretherketone (PEEK) by vapor deposition method in order to improve the bioactivity including antibacterial property of PEEK implant. The morphology and elemental composition of the coating were characterized by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), showing that the coating was mainly composed of Mg at deposition temperature of 175 °C, 185 °C, 200 °C and 230 °C. The higher the substrate temperature was, the larger the Mg particle size was. The coating degraded and gradually peeled off from the surface of PEEK after up to 21 days' immersion. It was found that the degradation of Mg coating could strongly kill with antibacterial rate reaching to 99%. Mg can be expected to be coated on those bio-inert biomaterials to offer specific bioactivities.

Research paper thumbnail of A one species — one population plant : how does the common fig escape genetic diversification ?

Genetic Differentiation and Dispersal in Plants, 1985

ABSTRACT The caprifig tree, which is the male form of the common fig (Ficus carica L.),must produ... more ABSTRACT The caprifig tree, which is the male form of the common fig (Ficus carica L.),must produce the pollen but also permit the completion of the life cycle of th pollinator...........please see full-text

Research paper thumbnail of Subsoil compaction effects on crops in Punjab, Pakistan

Soil and Tillage Research, 2001

Crop yields can be reduced by soil compaction due to increased resistance to root growth, and dec... more Crop yields can be reduced by soil compaction due to increased resistance to root growth, and decrease in water and nutrient use efficiencies. A field experiment was conducted during 1997–1998 and 1998–1999 on a sandy clay loam (fine-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) to study subsoil compaction effects on root growth, nutrient uptake and chemical composition of

Research paper thumbnail of Tillage effect on nutrient uptake by wheat and cotton as influenced by fertilizer rate

Soil and Tillage Research, 2001

Appropriate tillage and fertilizer management practices need to be developed for sustainable crop... more Appropriate tillage and fertilizer management practices need to be developed for sustainable crop production without jeopardizing the quality of soil and the environment. Effects of tillage and fertilizer were studied for 4 years on wheat (Triticum aestivum L.) and for 2 years on cotton (Gossypium hirsutum L.) from 1995±1996 to 1998±1999. The experiments were conducted on a sandy clay loam (®ne-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) in semi-arid region of Pakistan. Effects of three tillage methods as main plots and three fertilizer rates as sub-plots were studied in a split plot con®guration. Tillage treatments were minimum till (MT), conventional till (CT), and deep till (DT). Three rates of NPK fertilizer (kg ha À1) were 60-20-25 (F 1), 120-40-50 (F 2), and 180-60-75 (F 3) for wheat; and 85-19-25 (F 1), 170-38-50 (F 2), and 255-57-75 (F 3) for cotton. Tillage treatments had signi®cant effect on grain yield of wheat in 2 out of 4 years. Considering average yield over all fertilizer treatments and four seasons, mean wheat yield was 3.4 Mg ha À1 for MT, 5.0 Mg ha À1 for CT and 3.6 Mg ha À1 for DT. Mean grain yield based on the average of all tillage treatments over four seasons was 3.2 Mg ha À1 for F 1 , 3.7 Mg ha À1 for F 2 , and 3.9 Mg ha À1 for F 3. A similar trend was observed for wheat straw yields. Deep ploughing signi®cantly increased seed cotton yield compared to MT and CT treatments. Averaged over all fertilizer treatments and two seasons, mean seed cotton yield was 2.3 Mg ha À1 for MT, 2.4 Mg ha À1 for CT and 2.5 Mg ha À1 for DT. Similarly, the mean seed cotton yield was 2.1 Mg ha À1 for F 1 , 2.5 Mg ha À1 for F 2 and 2.6 Mg ha À1 for F 3. For both crops the interaction of tillage and fertilizer treatments was signi®cant. Tillage systems did not signi®cantly affect the plant tissue elemental contents of wheat (at tillering) and cotton (at¯owering). However, the increasing rates of N, P and K caused a corresponding increase in tissue contents of N, P and K of wheat and cotton. Tillage and fertilizer treatments had a positive effect on nutrient uptake by wheat. CT and DT increased N, P and K uptake compared to MT treatment.

Research paper thumbnail of Tillage effects on soil properties at different levels of fertilizer application in Punjab, Pakistan

Soil and Tillage Research, 2002

The effects of cropping systems and management practices on soil properties provide essential inf... more The effects of cropping systems and management practices on soil properties provide essential information for assessing sustainability and environmental impact. Tillage and fertilizer rates were evaluated for their effects on soil bulk density (BD), penetration resistance, soil organic carbon (SOC) concentration and availability of macronutrients on a sandy clay loam (fine-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) in a semi-arid region of Pakistan. Wheat (Triticum aestivum L.) and cotton (Gossypium hirsutum L.) were double-cropped from 1996 to 1998. Tillage treatments were minimum till (MT), conventional till (CT), and deep till (DT). Low, medium and high fertilizer rates were applied to wheat and cotton. BD was affected neither by tillage nor fertilizer rates. Soil penetration resistance was lower for DT than CT and MT. Tillage methods affected soil P concentration but did not affect N and K concentrations. However, fertilizer application significantly increased soil P and K concentrations. Concentrations of N, P, K and SOC were greater in the plough layer than subsoil. Grain yield of wheat was significantly negatively correlated with penetration resistance and was positively correlated with soil P and K concentrations. Yield of cotton was significantly negatively correlated with soil BD. These data provide an experimental basis to re-evaluate recommendations for fertilizer rates and tillage methods for production of wheat and cotton in Punjab. Further, there is a strong need to establish long-term experiments to study agronomic and environmental effects of tillage methods, fertilizer rates, and cropping systems on productivity and environment quality.

Research paper thumbnail of Tillage and Fertilizer Effects on Root Growth of Wheat and Cotton on a Sandy Clay Loam in Pakistan

Journal of Sustainable Agriculture, 2003

ABSTRACT. Tillage methods and fertilizer application affect root de-velopment, and the yield and ... more ABSTRACT. Tillage methods and fertilizer application affect root de-velopment, and the yield and quality of crops. Effects of tillage and fer-tilizer rates on root length density (RLD) of wheat (Triticum aestivum L.) and cotton (Gossypium hirsutum L.) and macronutrient content of ...

Research paper thumbnail of Persistence of Subsoil Compaction Effects on Soil Properties and Growth of Wheat and Cotton in Pakistan

Experimental Agriculture, 2003

The residual effects of subsoil compaction (below 0.15 m depth) on soil properties, growth, yield... more The residual effects of subsoil compaction (below 0.15 m depth) on soil properties, growth, yields and nutrient uptake by irrigated wheat (Triticum aestivum) and cotton (Gossipium hirsutum) are reported. The study was initiated during 1997 on a sandy clay loam soil in a semiarid region of Pakistan. Results showed that the adverse effects of subsoil compaction on bulk density, penetration resistance, total porosity and air-filled porosity of soil persisted for at least four years. In the third and fourth years after the imposition of treatments, compaction decreased yields of wheat by 12–18% and by 7% for cotton. The corresponding reductions in nutrient uptake by wheat were 11–16% for N, 11–15% for P and 5–10% for K. For cotton, the values were 9% for N, 3% for P and 7% for K. Subsoil compaction decreased nutrient use efficiency by 16% in wheat and 5% in cotton. The reductions in water use efficiency were estimated to be 11% in wheat and 7% in cotton. Wheat root length density was al...

Research paper thumbnail of The Stability of the Symbiosis between Dioecious Figs and Their Pollinators: A Study of Ficus carica L. and Blastophaga psenes L

Research paper thumbnail of Pemberdayaan ekonomi kelompok nelayan Desa Pangkah Kulon-Gresik dalam memproduksi kerupuk ikan sebagai upaya peningkatan nilai ekonomi ikan sortiran

Riau Journal of Empowerment, Dec 31, 2021

Pangkah Kulon is one of the villages in Gresik Regency which is located in Ujung Pangkah District... more Pangkah Kulon is one of the villages in Gresik Regency which is located in Ujung Pangkah District, Gresik, East Java. The lack of public knowledge about fish processing makes people required to be more creative in increasing the selling value of fish into processed products. So far, fresh fish caught by fishermen are sold directly to middlemen, while fresh fish that do not pass the sorting is simply thrown away. To increase the economic value of fish into high selling value products, training in the production of fish crackers is carried out. The training was conducted on the socialization of creative preparations, training on the manufacture and creative industry of fish crackers. In this training, participants (fishermen's wives) are trained to operate production equipment, from dough making, milling, to cutting. The knowledge and skills provided can be used as a pioneering effort for the fish cracker creative industry which is a favorite food for the community in general. In addition, it is also a business opportunity that can increase household income.

Research paper thumbnail of An Improved Ant Colony Optimization Algorithm for Vehicle Routing Problem with Time Windows

Jurnal Teknik Industri

Distribution plays an important role in the supply chain system. One of the critical problems in ... more Distribution plays an important role in the supply chain system. One of the critical problems in distribution is the vehicle routing problem. This research proposes the Improved Ant Colony Optimization (IACO) algorithm to solve the Vehicle Routing Problem with Time Windows (VRPTW). The main objective is to minimize the total vehicle mileage by considering the vehicle capacity and customer time windows. The proposed IACO algorithm is inspired by the conventional Ant Colony Optimization (ACO) algorithm by adding local search and mutation processes. Numerical experiments were conducted to test that the routes generated did not violate the customer's time window constraints. In addition, this study also compares the proposed IACO algorithm routes with other metaheuristic algorithms, namely ACO classic and Tabu Search. In addition, this investigation was carried out by experimenting with the number of iterations. The results of numerical experiments prove that the proposed IACO algor...

Research paper thumbnail of Numerical Investigation of Flow and Dispersion over Two-Dimensional Semi-Open Street Canyon

CFD Letters

A semi-open street canyon is able to protect pedestrians from unpleasant situations such as direc... more A semi-open street canyon is able to protect pedestrians from unpleasant situations such as direct sunlight and rain. However, the protruding elements of the two opposite building facades that form the semi-open configuration can affect the air quality of the urban canopy layer (UCL). Therefore, this paper investigated the influence of the eave structures on the flow and pollutant dispersion over an idealized 2D street canyon with a unity aspect ratio. The length of the eaves was varied into 0.25H and 0.5H (H is the building height) and placed either on the leeward wall, the windward wall, or on both building facades located at the same elevation as the street canyon. Numerical simulations were performed using the steady-state Reynolds-averaged Navier-Stokes (RANS) equations in conjunction with Re-Normalization Group (RNG) k-ε as the turbulence closure model. The pollutant was released from a line source in the center of the bottom of the target canyon with uniform flow rate. Six di...

Research paper thumbnail of Implementation of Open-Source ERP-Based Fleet Management System on SMEs Transportation Service Provider

Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi)

Enterprises Resource Planning (ERP) systems can be analogized as the backbone of the information ... more Enterprises Resource Planning (ERP) systems can be analogized as the backbone of the information system in a company. Many large-scale companies have adopted ERP systems to increase efficiency in the company's business processes. This research departs from the issue of Small and Medium Enterprises (SMEs) that are required to use ERP to compete in the global market but cannot implement an ERP system at a high cost. However, SMEs have financial limitations in adopting high-cost ERP systems. On the other hand, many open-source ERP systems can currently be used for free but with a limited number of modules. This study focuses on implementing an open-source ERP system using Odoo software version 15 on SMEs Transportation Services Providers. The goal is to develop an open-source ERP-based fleet management system for SMEs. The system developed successfully met the company's managerial expectations. All processes previously carried out manually have been carried out using the develo...

Research paper thumbnail of A Three-Phased Perishable Inventory Simulation Model with Quality Decrease Consideration

Jurnal Ilmiah Teknik Industri, 2020

In this article, focus on the simulation of a three-phase perishable product inventory system of ... more In this article, focus on the simulation of a three-phase perishable product inventory system of a SMEs selling fresh and processed milkfish. This research was conducted to simulate a perishable product inventory system to understand and analyze the problems that occur then propose solutions to fix them. The simulation model was developed with ARENA software, simulation results of the existing condition show that there is 162 kg/month waste in fresh fish, 158 pcs/month in processed product A, and 86 pcs/month in processed product B. A model with a product renewal process mechanism was proposed to overcome this problem, and seven improvement scenarios were developed. The results obtained from the seventh improvement scenario revealed that there was a 100% reduction in fresh fish and processed product B and 94% in processed product A. Besides, there was a saving in need for fresh fish supply of 10 kg/day. In this article, we show how ARENA software can be adopted to simulate inventory...

Research paper thumbnail of An effective hybrid ant lion algorithm to minimize mean tardiness on permutation flow shop scheduling problem

International Journal of Advances in Intelligent Informatics, 2020

This article aimed to develop an improved Ant Lion algorithm. The objective function was to minim... more This article aimed to develop an improved Ant Lion algorithm. The objective function was to minimize the mean tardiness on the flow shop scheduling problem with a focus on the permutation flow shop problem (PFSP). The Hybrid Ant Lion Optimization Algorithm (HALO) with local strategy was proposed, and from the total search of the agent, the NEH-EDD algorithm was applied. Moreover, the diversity of the nominee schedule was improved through the use of swap mutation, flip, and slide to determine the best solution in each iteration. Finally, the HALO was compared with some algorithms, while some numerical experiments were used to show the performances of the proposed algorithms. It is important to note that comparative analysis has been previously conducted using the nine variations of the PFSSP problem, and the HALO obtained was compared to other algorithms based on numerical experiments.

Research paper thumbnail of Mechanical properties of magnesium alloys for medical application: A review

Journal of the mechanical behavior of biomedical materials, Jan 21, 2018

Magnesium alloys as a class of biodegradable metals have great potential to be used as implant ma... more Magnesium alloys as a class of biodegradable metals have great potential to be used as implant materials, which attract much attention. In this review, the mechanical properties of magnesium alloys for medical applications are summarized. The methods to improve the mechanical properties of biodegradable magnesium alloys and the mechanical behaviors of Mg alloys in biomedical application are illustrated. Finally the challenges and future development of biodegradable magnesium alloys are presented.

Research paper thumbnail of Biofunctional Mg coating on PEEK for improving bioactivity

Bioactive materials, 2018

High purity Mg was successfully coated on polyetheretherketone (PEEK) by vapor deposition method ... more High purity Mg was successfully coated on polyetheretherketone (PEEK) by vapor deposition method in order to improve the bioactivity including antibacterial property of PEEK implant. The morphology and elemental composition of the coating were characterized by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), showing that the coating was mainly composed of Mg at deposition temperature of 175 °C, 185 °C, 200 °C and 230 °C. The higher the substrate temperature was, the larger the Mg particle size was. The coating degraded and gradually peeled off from the surface of PEEK after up to 21 days' immersion. It was found that the degradation of Mg coating could strongly kill with antibacterial rate reaching to 99%. Mg can be expected to be coated on those bio-inert biomaterials to offer specific bioactivities.

Research paper thumbnail of A one species — one population plant : how does the common fig escape genetic diversification ?

Genetic Differentiation and Dispersal in Plants, 1985

ABSTRACT The caprifig tree, which is the male form of the common fig (Ficus carica L.),must produ... more ABSTRACT The caprifig tree, which is the male form of the common fig (Ficus carica L.),must produce the pollen but also permit the completion of the life cycle of th pollinator...........please see full-text

Research paper thumbnail of Subsoil compaction effects on crops in Punjab, Pakistan

Soil and Tillage Research, 2001

Crop yields can be reduced by soil compaction due to increased resistance to root growth, and dec... more Crop yields can be reduced by soil compaction due to increased resistance to root growth, and decrease in water and nutrient use efficiencies. A field experiment was conducted during 1997–1998 and 1998–1999 on a sandy clay loam (fine-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) to study subsoil compaction effects on root growth, nutrient uptake and chemical composition of

Research paper thumbnail of Tillage effect on nutrient uptake by wheat and cotton as influenced by fertilizer rate

Soil and Tillage Research, 2001

Appropriate tillage and fertilizer management practices need to be developed for sustainable crop... more Appropriate tillage and fertilizer management practices need to be developed for sustainable crop production without jeopardizing the quality of soil and the environment. Effects of tillage and fertilizer were studied for 4 years on wheat (Triticum aestivum L.) and for 2 years on cotton (Gossypium hirsutum L.) from 1995±1996 to 1998±1999. The experiments were conducted on a sandy clay loam (®ne-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) in semi-arid region of Pakistan. Effects of three tillage methods as main plots and three fertilizer rates as sub-plots were studied in a split plot con®guration. Tillage treatments were minimum till (MT), conventional till (CT), and deep till (DT). Three rates of NPK fertilizer (kg ha À1) were 60-20-25 (F 1), 120-40-50 (F 2), and 180-60-75 (F 3) for wheat; and 85-19-25 (F 1), 170-38-50 (F 2), and 255-57-75 (F 3) for cotton. Tillage treatments had signi®cant effect on grain yield of wheat in 2 out of 4 years. Considering average yield over all fertilizer treatments and four seasons, mean wheat yield was 3.4 Mg ha À1 for MT, 5.0 Mg ha À1 for CT and 3.6 Mg ha À1 for DT. Mean grain yield based on the average of all tillage treatments over four seasons was 3.2 Mg ha À1 for F 1 , 3.7 Mg ha À1 for F 2 , and 3.9 Mg ha À1 for F 3. A similar trend was observed for wheat straw yields. Deep ploughing signi®cantly increased seed cotton yield compared to MT and CT treatments. Averaged over all fertilizer treatments and two seasons, mean seed cotton yield was 2.3 Mg ha À1 for MT, 2.4 Mg ha À1 for CT and 2.5 Mg ha À1 for DT. Similarly, the mean seed cotton yield was 2.1 Mg ha À1 for F 1 , 2.5 Mg ha À1 for F 2 and 2.6 Mg ha À1 for F 3. For both crops the interaction of tillage and fertilizer treatments was signi®cant. Tillage systems did not signi®cantly affect the plant tissue elemental contents of wheat (at tillering) and cotton (at¯owering). However, the increasing rates of N, P and K caused a corresponding increase in tissue contents of N, P and K of wheat and cotton. Tillage and fertilizer treatments had a positive effect on nutrient uptake by wheat. CT and DT increased N, P and K uptake compared to MT treatment.

Research paper thumbnail of Tillage effects on soil properties at different levels of fertilizer application in Punjab, Pakistan

Soil and Tillage Research, 2002

The effects of cropping systems and management practices on soil properties provide essential inf... more The effects of cropping systems and management practices on soil properties provide essential information for assessing sustainability and environmental impact. Tillage and fertilizer rates were evaluated for their effects on soil bulk density (BD), penetration resistance, soil organic carbon (SOC) concentration and availability of macronutrients on a sandy clay loam (fine-loamy, mixed, hyperthermic Typic Haplargids, USDA; Luvic Yermosol, FAO) in a semi-arid region of Pakistan. Wheat (Triticum aestivum L.) and cotton (Gossypium hirsutum L.) were double-cropped from 1996 to 1998. Tillage treatments were minimum till (MT), conventional till (CT), and deep till (DT). Low, medium and high fertilizer rates were applied to wheat and cotton. BD was affected neither by tillage nor fertilizer rates. Soil penetration resistance was lower for DT than CT and MT. Tillage methods affected soil P concentration but did not affect N and K concentrations. However, fertilizer application significantly increased soil P and K concentrations. Concentrations of N, P, K and SOC were greater in the plough layer than subsoil. Grain yield of wheat was significantly negatively correlated with penetration resistance and was positively correlated with soil P and K concentrations. Yield of cotton was significantly negatively correlated with soil BD. These data provide an experimental basis to re-evaluate recommendations for fertilizer rates and tillage methods for production of wheat and cotton in Punjab. Further, there is a strong need to establish long-term experiments to study agronomic and environmental effects of tillage methods, fertilizer rates, and cropping systems on productivity and environment quality.

Research paper thumbnail of Tillage and Fertilizer Effects on Root Growth of Wheat and Cotton on a Sandy Clay Loam in Pakistan

Journal of Sustainable Agriculture, 2003

ABSTRACT. Tillage methods and fertilizer application affect root de-velopment, and the yield and ... more ABSTRACT. Tillage methods and fertilizer application affect root de-velopment, and the yield and quality of crops. Effects of tillage and fer-tilizer rates on root length density (RLD) of wheat (Triticum aestivum L.) and cotton (Gossypium hirsutum L.) and macronutrient content of ...

Research paper thumbnail of Persistence of Subsoil Compaction Effects on Soil Properties and Growth of Wheat and Cotton in Pakistan

Experimental Agriculture, 2003

The residual effects of subsoil compaction (below 0.15 m depth) on soil properties, growth, yield... more The residual effects of subsoil compaction (below 0.15 m depth) on soil properties, growth, yields and nutrient uptake by irrigated wheat (Triticum aestivum) and cotton (Gossipium hirsutum) are reported. The study was initiated during 1997 on a sandy clay loam soil in a semiarid region of Pakistan. Results showed that the adverse effects of subsoil compaction on bulk density, penetration resistance, total porosity and air-filled porosity of soil persisted for at least four years. In the third and fourth years after the imposition of treatments, compaction decreased yields of wheat by 12–18% and by 7% for cotton. The corresponding reductions in nutrient uptake by wheat were 11–16% for N, 11–15% for P and 5–10% for K. For cotton, the values were 9% for N, 3% for P and 7% for K. Subsoil compaction decreased nutrient use efficiency by 16% in wheat and 5% in cotton. The reductions in water use efficiency were estimated to be 11% in wheat and 7% in cotton. Wheat root length density was al...

Research paper thumbnail of The Stability of the Symbiosis between Dioecious Figs and Their Pollinators: A Study of Ficus carica L. and Blastophaga psenes L

Research paper thumbnail of Pemberdayaan ekonomi kelompok nelayan Desa Pangkah Kulon-Gresik dalam memproduksi kerupuk ikan sebagai upaya peningkatan nilai ekonomi ikan sortiran

Riau Journal of Empowerment, Dec 31, 2021

Pangkah Kulon is one of the villages in Gresik Regency which is located in Ujung Pangkah District... more Pangkah Kulon is one of the villages in Gresik Regency which is located in Ujung Pangkah District, Gresik, East Java. The lack of public knowledge about fish processing makes people required to be more creative in increasing the selling value of fish into processed products. So far, fresh fish caught by fishermen are sold directly to middlemen, while fresh fish that do not pass the sorting is simply thrown away. To increase the economic value of fish into high selling value products, training in the production of fish crackers is carried out. The training was conducted on the socialization of creative preparations, training on the manufacture and creative industry of fish crackers. In this training, participants (fishermen's wives) are trained to operate production equipment, from dough making, milling, to cutting. The knowledge and skills provided can be used as a pioneering effort for the fish cracker creative industry which is a favorite food for the community in general. In addition, it is also a business opportunity that can increase household income.