Dr. Muhammad Ishaq Asif Rehmani (original) (raw)

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Papers by Dr. Muhammad Ishaq Asif Rehmani

The physiochemical characteristics and heavy metal concentrations in sub-surface soil at five dif... more The physiochemical characteristics and heavy metal concentrations in sub-surface soil at five different dumpsites in Rufus Giwa Polytechnic, Owo, Ondo State, Nigeria were investigated with a view to ascertain the level of pollution. Standard analytical methods for soil analysis were used for the physicochemical parameters while atomic absorption spectrophotometer (AAS) was used for the heavy metals analysis. The result showed that the pH value in soil sample from these sites ranged between 6.20±0.20-7.82±0.05. Percentage organic carbon and organic matter were in the range of 1.00±0.02-1.93±0.01 and 1.69±0.01-3.27±0.02 respectively. Heavy metal concentration for Pb and Zn were ranged between 0.21±0.01-0.46±0.01 mg kg-1 and 0.50±0.02-7.25±0.03 mg kg-1. Cadmium was not detected from all the sites including the control. Cr concentration ranged between 1.22±0.02-2.03±0.06 while Fe concentration ranged between 294.60±0.20-408.47±0.23 mg kg-1. Nickel concentration ranged between 0.01±0.01-0.02±0.01 mg kg-1. The results showed that concentrations of heavy metals and physicochemical parameters of soil samples from dumpsites location at Rufus Giwa Polytechnic, Owo, were within limits of Department of Petroleum Resources (DPR) and Food and Agriculture Organisation (FAO) standards.
Akinyinka Akinnusotu,* and Jacob Olalekan Arawande1

Water scarcity is a worldwide problem which could be solved by the use of low quality water like ... more Water scarcity is a worldwide problem which could be solved by the use of low quality water like textile effluent wastewater. However, this water contains toxic materials like azo dyes, heavy metals, etc. which have severe health hazardous effects after entering the food chains. Application of organic fertilizer with textile effluent wastewater could provide a sustainable solution to this problem as it provides adsorption sites for toxic materials and improves physicochemical and biological properties of soil. So, a pot experiment was conducted under glasshouse conditions using different combinations of textile effluent wastewater and organic fertilizer. The treatments where textile effluent wastewater and organic fertilizer were applied, their remaining NPK doses were fulfilled through chemical fertilizers. In results, treatment with textile effluent water + organic fertilizer @ 800 kg ha-1 (T6) showed at par results regarding the growth and yield parameters of wheat compared to control (T1; tap water and recommended doses of NPK). The same treatment caused an increase of 21%, 45%, 90% and 110% in no. of grains spike-1, root length (cm), fresh root and shoot biomass (g), respectively compared to the application of textile effluent water + recommended dose of NPK (T2). Similarly, NPK contents of straw (190%, 200% and 67%) and grain (45%, 300% and 73%) were significantly improved in textile effluent water + organic fertilizer @ 800 kg ha-1 (T6) compared to textile effluent water + recommended dose of NPK (T2), respectively. Moreover, microbial population was 1.5 folds more in textile effluent water + organic fertilizer @ 800 kg ha-1 (T6) compared to textile effluent water + recommended dose of NPK (T2). In conclusion, application of textile effluent wastewater along with organic fertilizer could help to mitigate its negative impacts on crop and soil health.

Astragalus legume species have many important applications including production of natural tragac... more Astragalus legume species have many important applications including production of natural tragacanth gum which is controlled by several climate factors, soil conditions and characteristics. Therefore, identification of major factors for maximizing this invaluable end-product is important for economy goals and plant health. In the present study, the relationship between soil physicochemical properties and gum production in Astragalus gossypinus Fisher was investigated. Seven-year-old plants were selected and then the gum and soil samples were taken along transects in a small area having the same specified climate. The soil physicochemical properties such as organic matter (OM) and saturation percentage (SP) showed the highest positive effect on gum production (P<0.01), while the amounts of calcium carbonate (CaCO3) and calcium sulfate (CaSO4) had the negative effect on gum production (P<0.01).The results showed that habitat soil factors should also be considered to determine the potential of plants for the production of tragacanth gum and its harvesting.

Olive vegetation water is a by-product obtained after the olive processing and is rich of nutrien... more Olive vegetation water is a by-product obtained after the olive processing and is rich of nutrients and minerals. The impact of varying rates of olive vegetation water (0, 5, 15, 20, 25 and 30 g kg 1) and Ca (0, 2.5 and 5.0%) doses on the soil fertility and the development of maize (cultivar Pioneer 31G98) were evaluated in present study. Statistically significant (at P ≤ 0.05) relationships were obtained in terms of the doses of olive vegetation water, olive vegetation water + lime and lime in the evaluation of the results of soil and plant analyses. After the application of olive vegetation water + lime doses increased the total salt and organic material of the tested soils. The highest positive impacts of both olive vegetation water and lime treatment on CaCO3 concentration were obtained at 15-20 g kg 1, and 2.5% lime dose. The increasing olive vegetation water rates significantly (P ≤ 0.05) increased the K uptake by the plants. In addition, application of 15 20 g kg 1 olive vegetation water caused positive effects on N, P, and K accumulation in maize. Saime Seferoğlu1,*, Jülide Firat1