Optimal applied water and nitrogen for winter wheat under variable seasonal rainfall and planning scenarios for consequent crops in a semi-arid region

Sepaskhah, Ali Reza; Azizian, A.; Tavakoli, Ali

doi:10.1016/j.agwat.2006.01.008

Cited by 33 publications

(23 citation statements)

References 19 publications

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“…Application of reduced source of N to the soil is considered good for building organic matter as well as for sustainability of soil. However, scare resources and environmental concerns do not allow the farmer boundless application of commercial fertilizers (Sepaskhah et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Response of Tillage, Nitrogen and Stubble Management on Phenology and Crop Establishment of Wheat

Basir¹,

Jan²,

Arif³

et al. 2015

IJAB

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To cite this paper: Basir, A., M.T. Jan, M. Arif and M.J. Khan, 2016 ) application. The objective of the study was to examine the treatment effects on phenology, establishment and yield of succeeding wheat crop. Result showed that wheat phenology except days to emergence was not affected by different TS however; early emergence (10 days) was observed in minimum tillage rather than conventional and deep tillage system. Nitrogen fertilization (120 kg N ha -1 ) enhanced days to phenological observations, while no significant variation in days to emergence and physiological maturity were recorded among SM practices, however; stubble incorporation delayed the booting and anthesis stage compared to burning and removing. Minimum tillage improved emergence, tillers and grain yield (3134 kg ha -1 ) compared to deep tillage systems. Nitrogen fertilization at the rate of 120 kg ha -1 and maize stubble incorporation prior to wheat sowing also improved emergence, tillers, plant height and grain yield compared to control and stubble removal or burning. It is concluded from current study that maize stubble incorporation with recommended dose of fertilizer N (120 kg ha -1 ) prior to wheat sowing delayed phenology, and improved wheat establishment and yield under minimum tillage in a continuous cereal based cropping system instead of stubble burning and removal.

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Section: Introductionmentioning

confidence: 99%

Response of Tillage, Nitrogen and Stubble Management on Phenology and Crop Establishment of Wheat

Basir¹,

Jan²,

Arif³

et al. 2015

IJAB

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show abstract

“…Next to water, nutrients-and especially nitrogen (N)play an important role in agricultural production. WP can be enhanced by an adequate nutrient supply (Sepaskhah et al, 2006). Moreover, adequate irrigation has the potential to reduce N-leaching and achieve high yields (McKeown et al, 2010).…”

Section: Further Aspectsmentioning

confidence: 99%

Optimal Irrigation Scheduling, Irrigation Control and Drip Line Layout to Increase Water Productivity and Profit in Subsurface Drip‐Irrigated Agriculture

Seidel

Schütze

Fahle

et al. 2015

Irrigation and Drainage

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A new optimization framework is presented which is able to identify optimal solutions for maximum profit design of subsurface drip irrigation (SDI) systems under limited supply. To solve this complex optimization problem, decomposition is used which splits the problem into three sub‐problems: (i) optimal irrigation control, which maximizes water distribution uniformity and minimizes percolation losses; (ii) optimal irrigation scheduling, which minimizes irrigation water applied in order to meet a high yield with a specified reliability; and (iii) optimal drip line layout, which includes the solutions of the other sub‐problems and maximizes profitability. The multi‐level optimization framework was tested in France with corn cultivated on two SDI plots with drip line spacing of 1.2 m (SDI120) and 1.6 m (SDI160), respectively. HYDRUS simulations estimated adequate irrigation amounts of 20–35 mm per event. For optimal irrigation scheduling, initial schedules were provided at sowing and adapted weekly according to observed weather data and synthetic weather scenarios. The presented framework significantly increased profit and water productivity for deficit SDI designs. The latter was increased up to 30% (SDI120), compared to seven other irrigation experiments. The optimal SDI design was achieved by SDI160, which increased profitability by 27% compared to SDI120. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Up to now, the majority of the cropping pattern and water resources optimization models can be put into two main strands: lumped plain models (whole area suggestions) and farm models [23]- [25]. Although these studies dealt with the variations of various parameters by means of random sampling methods, data had not any spatial features and were considered constant throughout the whole study area.…”

Section: Introductionmentioning

confidence: 99%

Distributed versus Lumped Optimization of Cropping Pattern and Water Resources Utilization

Ghasemi¹,

Karamouz²,

Shui³

2014

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Several whole-farm agro-economic optimization models have been developed to deal with lumped planning issues in the agriculture sector. However, these models cannot be used to devise appropriate management strategies at land parcel level, because of the differences between farm characteristics, and the increased complexity of the hydrological processes. Based on Spatial Farm Database (SFD) which is consisted of a number of farm-level spatial data, including location, paddock properties, owner specifications and budgets, it is possible to provide the farm manager with some suggestions regarding the optimal choice of crops and the area to be allocated for each one. To this end, genetic algorithm is used in order to cope with model nonlinearity and a large number of decision variables. In order to test the proposed model, the Mobarakabad district is modeled with 126 agriculture fields, and the optimization model is run for this area. Results showed that the optimization procedure can find more realistic farm-level optimal solutions due to its advantage in adequate modeling of field characteristics, common groundwater resources, and the associated constraints. The results of lumped optimizations could also be used as benchmarks for the purposes of comparison and interpretation.

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Optimal applied water and nitrogen for winter wheat under variable seasonal rainfall and planning scenarios for consequent crops in a semi-arid region

Cited by 33 publications

References 19 publications

Response of Tillage, Nitrogen and Stubble Management on Phenology and Crop Establishment of Wheat

Response of Tillage, Nitrogen and Stubble Management on Phenology and Crop Establishment of Wheat

Optimal Irrigation Scheduling, Irrigation Control and Drip Line Layout to Increase Water Productivity and Profit in Subsurface Drip‐Irrigated Agriculture

Distributed versus Lumped Optimization of Cropping Pattern and Water Resources Utilization

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