Seyed Majid Mirlatifi - Academia.edu (original) (raw)

Papers by Seyed Majid Mirlatifi

Producing daily actual evapotranspiration (ETa) maps with high spatial resolution has always been... more Producing daily actual evapotranspiration (ETa) maps with high spatial resolution has always been a challenge for remote sensing research. This study assessed the feasibility of producing daily ETa maps with a high spatial resolution (30 m) for the sugarcane farmlands of Amir Kabir Sugarcane Agro-industry (Khuzestan, Iran) using three different scenarios. In the first scenario, the reflectance bands of Landsat 8 were predicted from the moderate resolution imaging spectroradiometer (MODIS) imagery using the spatial and temporal adaptive reflectance fusion model (STARFM) algorithm. Also, the thermal bands of Landsat 8 were predicted by the spatiotemporal adaptive data fusion algorithm for temperature mapping (SADFAT). Then, ETa amounts were calculated employing such bands and the surface energy balance algorithm for land (SEBAL). In the second scenario, the input data needed by SEBAL were downscaled using the MODIS images and different methods. Then, using the downscaled data and SEBA...

Journal of Plant Nutrition

Agricultural Water Management an International Journal, Jun 1, 2009

Diurnal variations of net photosynthesis (A), stomatal conductance (gs) and transpiration (E) rat... more Diurnal variations of net photosynthesis (A), stomatal conductance (gs) and transpiration (E) rates were assessed at the leaf surfaces of two pistachio (Pistacia vera L.) genotypes, in reference to diurnal fluctuations of leaf temperature (Tleaf), vapor pressure deficit (VPD) and photosynthetic photon flux density (PPFD). In this experiment, diurnal changes of net CO2 assimilation showed a two-peak pattern in which the first peaks were appeared at 9:00 and 8:00 in ‘Badami’ and ‘Qazvini’ genotypes, respectively. Also, the second peaks emerged at 16:00, and the lowest assimilation rates were observed at 15:00 in both genotypes. The corresponded PPFD with the highest net assimilation rate were achieved at 1500 and 1150 µmol m-2 s-1 in ‘Badami’ and ‘Qazvini’, respectively. Diurnal pattern of net photosynthesis rates was correlated with stomatal conductance ¬(r=0.76) and transpiration (r=0.73) rates. It seems that stomatal conductance in 'Badami' was primarily limited by VPD and ...

Paddy and Water Environment, 2013

ABSTRACT In Northern Iran paddy fields, waterlogging is a serious problem. Provision of subsurfac... more ABSTRACT In Northern Iran paddy fields, waterlogging is a serious problem. Provision of subsurface drainage seems to be a prerequisite for optimal crop production. Considering specific characteristics of the paddies, application of a suitable equation for planning of subsurface drainage systems is of great importance. In this study, five steady-state equations including Hooghoudt, Kirkham, Dagan, Ernst, and Ernst–Hooghoudt; and three unsteady-state equations including Glover–Dumm, Van-Shilfgard, and De-zeeuw–Hellinga were implemented to compute drain spacing. Required field data were obtained from 52 ha of paddy fields of “Haraz Human-Agriculture Resources Development Center,” located in Mazandaran province of Iran. The computed drain spacings were evaluated using dynamic equilibrium concept and DRAINMOD model. The minimum and maximum drain spacings were found to be 26 and 63 m corresponding to Glover–Dumm and Ernst equations, respectively. Based on the dynamic equilibrium concept, the averages of the computed water table depths for the drain spacings obtained by the unsteady-state equations were 0.5–0.63 m as compared with those obtained by the steady-state methods which were in the range of 0–0.43 m. According to the DRAINMOD model simulations, the maximum relative yield was 80.2 % which was obtained when the drain spacing was 26 m and it reduced to 73.5 % when the drain spacing was increased to 63 m. The computed drain spacings suggested by the unsteady-state equations were found to be more suitable than those obtained from the steady-state equations for the study area.

2007 Minneapolis, Minnesota, June 17-20, 2007, 2007

Page 1. The authors are solely responsible for the content of this technical presentation. The te... more Page 1. The authors are solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of the American Society of Agricultural and Biological Engineers ...

Journal of Hydrology, 2013

ABSTRACT Highlights ► Performance of developed ANN models improved through the infiltration time.... more ABSTRACT Highlights ► Performance of developed ANN models improved through the infiltration time. ► Cumulative infiltration curve, I(t), was estimated with the mean RMSD of 6.307 cm. ► The estimated I(t) can be accepted as a reliable infiltration test result (p < 0.01).

Agriculture, Ecosystems & Environment, 2013

ABSTRACT a b s t r a c t Various weed management methods have been tested without complete succes... more ABSTRACT a b s t r a c t Various weed management methods have been tested without complete success and still represent a major nuisance often negatively effecting yields. Therefore, it may be time to change attitudes about weeds and view them as friends of the agroecosystem rather than as foes. For the first time, field experi-ments were conducted to introduce and evaluate the yield and quality of corn–redroot pigweed mixture forage in a semi-arid region of Iran during 2010 and 2011. A randomized complete block design with a split factorial arrangement of treatments in four replications was subjected to low irrigation and full irrigation regimes. Subplots consisted of a factorial combination of four N levels (0, 150, 300 and 450 kg N ha −1) and two forage mixtures (corn monoculture and corn–redroot pigweed mixture). When averaged over both years, N addition (from 0 to 450 kg N ha −1) increased corn forage yield by 74 and 42% under full and low irrigation regimes, respectively. The forage yield increased by 121 and 69% in the corn–pigweed mixture for comparable treatments. In corn monoculture, the minimum required for-age protein (90 g kg −1) occurred only where forage yields were lower than 10 t ha −1 , whereas in the corn–pigweed mixture, all the treatments with 90 g kg −1 protein produced yield more than 11 t ha −1 . N enhancement (0–450 kg ha −1) increased nitrate leaching loss (NLL) by 158 and 107 kg ha −1 in corn monoculture and 100 and 55 kg ha −1 in the corn–pigweed mixture under full and low irrigation regimes, respectively. However, an alteration in the NLL trend in response to N application grew in both forage types, but the NLL severity was reduced in the corn pigweed mixture. The integration of redroot pigweed (a major weed species on summer crop farms) with corn, rather than its removal, could be recommended to ensure an acceptable forage yield/quality in a poor sandy soil while also reducing N leaching.

Agricultural Water Management, 2013

ABSTRACT The hydrological effects of different drainage systems were investigated as a pilot stud... more ABSTRACT The hydrological effects of different drainage systems were investigated as a pilot study in 4.5 ha of paddy fields of Sari Agricultural Sciences and Natural Resources University, located at Mazandaran province, Northern Iran (36.3 °N, 53.04 °E), during two successive growing seasons of rice and canola from July 2011 to May 2012. Experimental treatments were: three conventional subsurface drainage systems including drainage system with drain depth of 0.9 m and drain spacing of 30 m (D0.9L30), drain depth of 0.65 m and drain spacing of 30 m (D0.65L30), and drain depth of 0.65 m and drain spacing of 15 m (D0.65L15); a bi-level subsurface drainage system with drain spacing of 15 m and drain depths of 0.65 and 0.9 m as alternate depths (Bilevel), and surface drainage system (Control). Water balance components were determined in both rice and canola crop seasons. Measurements of water table depth and subsurface drainage discharge were made daily during drainage periods. In the rice season, the total water supply was 754.6 mm, of which 61.7% was lost by evapotranspiration and 16.2–19.1% was lost by deep percolation (DP). In the canola season, the treatments of D0.9L30, Bilevel, D0.65L30 and D0.65L15 were discharged, respectively, 44%, 51.5%, 43% and 60.5% of the total rainfall from the soil profile. Shallow drains were more effective in controlling water table compared with deep drains so that, average of measured water table depths in the representative observation wells of D0.9L30, Bilevel, D0.65L30, and D0.65L15 were 2.1, 15, 24.1, and 32.4 cm, respectively. Also, values of SEW30 (sum of excess water) were 3461, 1498, 1038 and 450 cm for D0.9L30, Bilevel, D0.65L30 and D0.65L15, respectively. Based on the results, water management through a subsurface drainage system could provide winter cropping condition in the study area.

Agricultural Water Management, 2013

ABSTRACT The effects of water, N and weed interactions on crop performance have not been adequate... more ABSTRACT The effects of water, N and weed interactions on crop performance have not been adequately addressed. The main objectives of this study, which was conducted in a semi-arid region of Iran during the 2010 and 2011 growing seasons, were to determine the effects of interactions among irrigation regimes (I), weed competition (W) and N rates on corn yield, dry matter and grain N concentration, N use efficiency and nitrate leaching in a sandy soil. The experiment was carried out using a randomized complete block design with a split factorial arrangement of treatments in four replications. The main plots were subjected to the following irrigation treatments: Low frequency irrigation (I1) and high frequency irrigation (I2). The subplots consisted of a factorial combination of four N levels (0, 150, 300 and 450 kg N ha1) and two levels of redroot pigweed interference with corn (weed free, W0; and weedy, W1). When averaged over both years, the results showed that the enhancement of applied N (0–450 kg N ha−1) increased corn grain yield by 63% with high frequency irrigation and by 25% with low frequency irrigation. Moreover, the results showed that the enhancement of applied N from 0 to 450 kg N ha−1 resulted in a ten- and six-fold increase in nitrate leaching loss (NLL) with the high and low frequency irrigation regimes, respectively. In both the weedy and weed free treatments, the NLL increased, but the NLL intensity decreased in response to the enhancement of applied N in the presence of weeds. The mean comparisons of N use efficiency showed that in the N150 treatment, each kilogram of applied N led to the production of 19 and 14 kg grain ha−1 with high and low frequency irrigation, respectively. In contrast, in the N450 treatment, each kilogram of applied N resulted in the production of 8 and 5 kg grain ha−1 in the high and low frequency irrigation regimes, respectively. Finally, results showed that it is necessary to achieve equilibrium between applied water and N, especially in sandy soils, which will lead to a reduction in the indiscriminate application of nitrogen fertilizer that does not effectively increase the corn yield whereas it severely increases nitrate leaching loss.

Agricultural Water Management, 2009

Agricultural Water Management, 2009

Producing daily actual evapotranspiration (ETa) maps with high spatial resolution has always been... more Producing daily actual evapotranspiration (ETa) maps with high spatial resolution has always been a challenge for remote sensing research. This study assessed the feasibility of producing daily ETa maps with a high spatial resolution (30 m) for the sugarcane farmlands of Amir Kabir Sugarcane Agro-industry (Khuzestan, Iran) using three different scenarios. In the first scenario, the reflectance bands of Landsat 8 were predicted from the moderate resolution imaging spectroradiometer (MODIS) imagery using the spatial and temporal adaptive reflectance fusion model (STARFM) algorithm. Also, the thermal bands of Landsat 8 were predicted by the spatiotemporal adaptive data fusion algorithm for temperature mapping (SADFAT). Then, ETa amounts were calculated employing such bands and the surface energy balance algorithm for land (SEBAL). In the second scenario, the input data needed by SEBAL were downscaled using the MODIS images and different methods. Then, using the downscaled data and SEBA...

Journal of Plant Nutrition

Agricultural Water Management an International Journal, Jun 1, 2009

Diurnal variations of net photosynthesis (A), stomatal conductance (gs) and transpiration (E) rat... more Diurnal variations of net photosynthesis (A), stomatal conductance (gs) and transpiration (E) rates were assessed at the leaf surfaces of two pistachio (Pistacia vera L.) genotypes, in reference to diurnal fluctuations of leaf temperature (Tleaf), vapor pressure deficit (VPD) and photosynthetic photon flux density (PPFD). In this experiment, diurnal changes of net CO2 assimilation showed a two-peak pattern in which the first peaks were appeared at 9:00 and 8:00 in ‘Badami’ and ‘Qazvini’ genotypes, respectively. Also, the second peaks emerged at 16:00, and the lowest assimilation rates were observed at 15:00 in both genotypes. The corresponded PPFD with the highest net assimilation rate were achieved at 1500 and 1150 µmol m-2 s-1 in ‘Badami’ and ‘Qazvini’, respectively. Diurnal pattern of net photosynthesis rates was correlated with stomatal conductance ¬(r=0.76) and transpiration (r=0.73) rates. It seems that stomatal conductance in 'Badami' was primarily limited by VPD and ...

Paddy and Water Environment, 2013

ABSTRACT In Northern Iran paddy fields, waterlogging is a serious problem. Provision of subsurfac... more ABSTRACT In Northern Iran paddy fields, waterlogging is a serious problem. Provision of subsurface drainage seems to be a prerequisite for optimal crop production. Considering specific characteristics of the paddies, application of a suitable equation for planning of subsurface drainage systems is of great importance. In this study, five steady-state equations including Hooghoudt, Kirkham, Dagan, Ernst, and Ernst–Hooghoudt; and three unsteady-state equations including Glover–Dumm, Van-Shilfgard, and De-zeeuw–Hellinga were implemented to compute drain spacing. Required field data were obtained from 52 ha of paddy fields of “Haraz Human-Agriculture Resources Development Center,” located in Mazandaran province of Iran. The computed drain spacings were evaluated using dynamic equilibrium concept and DRAINMOD model. The minimum and maximum drain spacings were found to be 26 and 63 m corresponding to Glover–Dumm and Ernst equations, respectively. Based on the dynamic equilibrium concept, the averages of the computed water table depths for the drain spacings obtained by the unsteady-state equations were 0.5–0.63 m as compared with those obtained by the steady-state methods which were in the range of 0–0.43 m. According to the DRAINMOD model simulations, the maximum relative yield was 80.2 % which was obtained when the drain spacing was 26 m and it reduced to 73.5 % when the drain spacing was increased to 63 m. The computed drain spacings suggested by the unsteady-state equations were found to be more suitable than those obtained from the steady-state equations for the study area.

2007 Minneapolis, Minnesota, June 17-20, 2007, 2007

Page 1. The authors are solely responsible for the content of this technical presentation. The te... more Page 1. The authors are solely responsible for the content of this technical presentation. The technical presentation does not necessarily reflect the official position of the American Society of Agricultural and Biological Engineers ...

Journal of Hydrology, 2013

ABSTRACT Highlights ► Performance of developed ANN models improved through the infiltration time.... more ABSTRACT Highlights ► Performance of developed ANN models improved through the infiltration time. ► Cumulative infiltration curve, I(t), was estimated with the mean RMSD of 6.307 cm. ► The estimated I(t) can be accepted as a reliable infiltration test result (p < 0.01).

Agriculture, Ecosystems & Environment, 2013

ABSTRACT a b s t r a c t Various weed management methods have been tested without complete succes... more ABSTRACT a b s t r a c t Various weed management methods have been tested without complete success and still represent a major nuisance often negatively effecting yields. Therefore, it may be time to change attitudes about weeds and view them as friends of the agroecosystem rather than as foes. For the first time, field experi-ments were conducted to introduce and evaluate the yield and quality of corn–redroot pigweed mixture forage in a semi-arid region of Iran during 2010 and 2011. A randomized complete block design with a split factorial arrangement of treatments in four replications was subjected to low irrigation and full irrigation regimes. Subplots consisted of a factorial combination of four N levels (0, 150, 300 and 450 kg N ha −1) and two forage mixtures (corn monoculture and corn–redroot pigweed mixture). When averaged over both years, N addition (from 0 to 450 kg N ha −1) increased corn forage yield by 74 and 42% under full and low irrigation regimes, respectively. The forage yield increased by 121 and 69% in the corn–pigweed mixture for comparable treatments. In corn monoculture, the minimum required for-age protein (90 g kg −1) occurred only where forage yields were lower than 10 t ha −1 , whereas in the corn–pigweed mixture, all the treatments with 90 g kg −1 protein produced yield more than 11 t ha −1 . N enhancement (0–450 kg ha −1) increased nitrate leaching loss (NLL) by 158 and 107 kg ha −1 in corn monoculture and 100 and 55 kg ha −1 in the corn–pigweed mixture under full and low irrigation regimes, respectively. However, an alteration in the NLL trend in response to N application grew in both forage types, but the NLL severity was reduced in the corn pigweed mixture. The integration of redroot pigweed (a major weed species on summer crop farms) with corn, rather than its removal, could be recommended to ensure an acceptable forage yield/quality in a poor sandy soil while also reducing N leaching.

Agricultural Water Management, 2013

ABSTRACT The hydrological effects of different drainage systems were investigated as a pilot stud... more ABSTRACT The hydrological effects of different drainage systems were investigated as a pilot study in 4.5 ha of paddy fields of Sari Agricultural Sciences and Natural Resources University, located at Mazandaran province, Northern Iran (36.3 °N, 53.04 °E), during two successive growing seasons of rice and canola from July 2011 to May 2012. Experimental treatments were: three conventional subsurface drainage systems including drainage system with drain depth of 0.9 m and drain spacing of 30 m (D0.9L30), drain depth of 0.65 m and drain spacing of 30 m (D0.65L30), and drain depth of 0.65 m and drain spacing of 15 m (D0.65L15); a bi-level subsurface drainage system with drain spacing of 15 m and drain depths of 0.65 and 0.9 m as alternate depths (Bilevel), and surface drainage system (Control). Water balance components were determined in both rice and canola crop seasons. Measurements of water table depth and subsurface drainage discharge were made daily during drainage periods. In the rice season, the total water supply was 754.6 mm, of which 61.7% was lost by evapotranspiration and 16.2–19.1% was lost by deep percolation (DP). In the canola season, the treatments of D0.9L30, Bilevel, D0.65L30 and D0.65L15 were discharged, respectively, 44%, 51.5%, 43% and 60.5% of the total rainfall from the soil profile. Shallow drains were more effective in controlling water table compared with deep drains so that, average of measured water table depths in the representative observation wells of D0.9L30, Bilevel, D0.65L30, and D0.65L15 were 2.1, 15, 24.1, and 32.4 cm, respectively. Also, values of SEW30 (sum of excess water) were 3461, 1498, 1038 and 450 cm for D0.9L30, Bilevel, D0.65L30 and D0.65L15, respectively. Based on the results, water management through a subsurface drainage system could provide winter cropping condition in the study area.

Agricultural Water Management, 2013

ABSTRACT The effects of water, N and weed interactions on crop performance have not been adequate... more ABSTRACT The effects of water, N and weed interactions on crop performance have not been adequately addressed. The main objectives of this study, which was conducted in a semi-arid region of Iran during the 2010 and 2011 growing seasons, were to determine the effects of interactions among irrigation regimes (I), weed competition (W) and N rates on corn yield, dry matter and grain N concentration, N use efficiency and nitrate leaching in a sandy soil. The experiment was carried out using a randomized complete block design with a split factorial arrangement of treatments in four replications. The main plots were subjected to the following irrigation treatments: Low frequency irrigation (I1) and high frequency irrigation (I2). The subplots consisted of a factorial combination of four N levels (0, 150, 300 and 450 kg N ha1) and two levels of redroot pigweed interference with corn (weed free, W0; and weedy, W1). When averaged over both years, the results showed that the enhancement of applied N (0–450 kg N ha−1) increased corn grain yield by 63% with high frequency irrigation and by 25% with low frequency irrigation. Moreover, the results showed that the enhancement of applied N from 0 to 450 kg N ha−1 resulted in a ten- and six-fold increase in nitrate leaching loss (NLL) with the high and low frequency irrigation regimes, respectively. In both the weedy and weed free treatments, the NLL increased, but the NLL intensity decreased in response to the enhancement of applied N in the presence of weeds. The mean comparisons of N use efficiency showed that in the N150 treatment, each kilogram of applied N led to the production of 19 and 14 kg grain ha−1 with high and low frequency irrigation, respectively. In contrast, in the N450 treatment, each kilogram of applied N resulted in the production of 8 and 5 kg grain ha−1 in the high and low frequency irrigation regimes, respectively. Finally, results showed that it is necessary to achieve equilibrium between applied water and N, especially in sandy soils, which will lead to a reduction in the indiscriminate application of nitrogen fertilizer that does not effectively increase the corn yield whereas it severely increases nitrate leaching loss.

Agricultural Water Management, 2009

Agricultural Water Management, 2009