Managing controlled drainage in irrigated farmers’ fields: A case study in the Moghan plain, Iran

Jouni, Hamidreza Javani; Liaghat, Abdolmajid; Hassanoghli, A; Ritzema, H.P.

doi:10.1016/j.agwat.2018.06.037

Cited by 41 publications

(21 citation statements)

References 64 publications

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“…Our results corroborate with Ballantine and Tanner [34], and Ritzema [35], where both studies demonstrated how the drainage system was an important externality for agricultural production to prevent waterlogging and salinization of the soil in arid and semi-arid regions and strategically control drainage of excess water from the soil profile. It has also been reported that water use efficiency for wheat with a controlled drainage with a varying depth was 40% higher than that with the conventional drainage, depending on the crop stage [36]. Tomic et al [37] showed that a DBD value of 25 m provided the highest wheat yield among seven different drainage systems, which is in agreement with our result in that DBD is one of the most sensitive parameters for the dry matter of winter wheat.…”

Section: Discussionsupporting

confidence: 91%

A Sensitivity Analysis of the SPACSYS Model

et al. 2021

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A sensitivity analysis is critical for determining the relative importance of model parameters to their influence on the simulated outputs from a process-based model. In this study, a sensitivity analysis for the SPACSYS model, first published in Ecological Modelling (Wu, et al., 2007), was conducted with respect to changes in 61 input parameters and their influence on 27 output variables. Parameter sensitivity was conducted in a ‘one at a time’ manner and objectively assessed through a single statistical diagnostic (normalized root mean square deviation) which ranked parameters according to their influence of each output variable in turn. A winter wheat field experiment provided the case study data. Two sets of weather elements to represent different climatic conditions and four different soil types were specified, where results indicated little influence on these specifications for the identification of the most sensitive parameters. Soil conditions and management were found to affect the ranking of parameter sensitivities more strongly than weather conditions for the selected outputs. Parameters related to drainage were strongly influential for simulations of soil water dynamics, yield and biomass of wheat, runoff, and leaching from soil during individual and consecutive growing years. Wheat yield and biomass simulations were sensitive to the ‘ammonium immobilised fraction’ parameter that related to soil mineralization and immobilisation. Simulations of CO2 release from the soil and soil nutrient pool changes were most sensitive to external nutrient inputs and the process of denitrification, mineralization, and decomposition. This study provides important evidence of which SPACSYS parameters require the most care in their specification. Moving forward, this evidence can help direct efficient sampling and lab analyses for increased accuracy of such parameters. Results provide a useful reference for model users on which parameters are most influential for different simulation goals, which in turn provides better informed decision making for farmers and government policy alike.

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Section: Discussionsupporting

confidence: 91%

A Sensitivity Analysis of the SPACSYS Model

et al. 2021

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“…Also, Valero et al ( 2007 ) reported an increase in P mobilization in a Canadian Humic Gleysol at increased water table. Other studies, however, detected decreased P loads in controlled drainage water (Wesström and Messing 2007 ; Jouni et al 2018 ).…”

Section: Introductionmentioning

confidence: 88%

Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character

Baumann

Shaheen

et al. 2020

Environ Geochem Health

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Controlled drainage is considered as a soil management tool to improve water supply to crops and reduce nutrient losses from fields; however, its closure may affect phosphorus (P) mobilization in soil. To assess the P mobilization potential, three soil profiles with redoximorphic features were selected along a slight hill in Northern Germany. Soil samples from three depths of each profile were characterized for basic properties, total element content, oxalate-and dithionite-extractable pedogenic Al, Fe and Mn Electronic supplementary material The online version of this article (

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“…Water scarcity is a major concern for the next decades [7][8][9][10]. Unfortunately, the problem of water scarcity is expected to escalate due to rapid population growth and climate change [11][12][13]. Climate change models predict more excessive heat waves, more intense and frequent-drought waves, and a higher frequency of intensive rainfall [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Conservation Agriculture Effects on Soil Water Holding Capacity and Water-Saving Varied with Management Practices and Agroecological Conditions: A Review

et al. 2021

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Improving soil water holding capacity (WHC) through conservation agriculture (CA)-practices, i.e., minimum mechanical soil disturbance, crop diversification, and soil mulch cover/crop residue retention, could buffer soil resilience against climate change. CA-practices could increase soil organic carbon (SOC) and alter pore size distribution (PSD); thus, they could improve soil WHC. This paper aims to review to what extent CA-practices can influence soil WHC and water-availability through SOC build-up and the change of the PSD. In general, the sequestered SOC due to the adoption of CA does not translate into a significant increase in soil WHC, because the increase in SOC is limited to the top 5–10 cm, which limits the capacity of SOC to increase the WHC of the whole soil profile. The effect of CA-practices on PSD had a slight effect on soil WHC, because long-term adoption of CA-practices increases macro- and bio-porosity at the expense of the water-holding pores. However, a positive effect of CA-practices on water-saving and availability has been widely reported. Researchers attributed this positive effect to the increase in water infiltration and reduction in evaporation from the soil surface (due to mulching crop residue). In conclusion, the benefits of CA in the SOC and soil WHC requires considering the whole soil profile, not only the top soil layer. The positive effect of CA on water-saving is attributed to increasing water infiltration and reducing evaporation from the soil surface. CA-practices’ effects are more evident in arid and semi-arid regions; therefore, arable-lands in Sub-Sahara Africa, Australia, and South-Asia are expected to benefit more. This review enhances our understanding of the role of SOC and its quantitative effect in increasing water availability and soil resilience to climate change.

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Managing controlled drainage in irrigated farmers’ fields: A case study in the Moghan plain, Iran

Cited by 41 publications

References 64 publications

A Sensitivity Analysis of the SPACSYS Model

A Sensitivity Analysis of the SPACSYS Model

Speciation and sorption of phosphorus in agricultural soil profiles of redoximorphic character

Conservation Agriculture Effects on Soil Water Holding Capacity and Water-Saving Varied with Management Practices and Agroecological Conditions: A Review

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