Your search found 3 records
1 Temesgen, B. B. 2012. Rainwater harvesting for dryland agriculture in the Rift Valley of Ethiopia. PhD thesis. Wageningen, Netherlands: Wageningen University. 152p.
Rainwater ; Water harvesting ; Water conservation ; Arid zones ; Agricultural systems ; Dry farming ; Rainfed farming ; Water storage ; Supplemental irrigation ; Catchment areas ; Drought ; Land management ; Land use ; Land cover ; Valleys ; Socioeconomic environment ; Soil physical properties / Ethiopia / Rift Valley
(Location: IWMI HQ Call no: 333.91 G136 TEM Record No: H044933)
(0.31 MB)
2 Patra, S.; Parihar, C. M.; Mahala, D. M.; Singh, D.; Nayak, H. S.; Patra, K.; Reddy, K. S.; Pradhan, S.; Sena, Dipaka Ranjan. 2023. Influence of long-term tillage and diversified cropping systems on hydro-physical properties in a sandy loam soil of North-western India. Soil and Tillage Research, 229:105655. [doi: https://doi.org/10.1016/j.still.2023.105655]
Cropping systems ; Diversification ; Tillage ; Hydraulic conductivity ; Soil physical properties ; Sandy loam soils ; Soil aggregates ; Soil organic carbon ; Conservation agriculture ; Maize ; Wheat ; Mung beans ; Chickpeas ; Mustard ; Sesbania / India / New Delhi
(Location: IWMI HQ Call no: e-copy only Record No: H051761)
(2.53 MB)
A study was conducted to determine the combined effects of three tillage practices and four maize (Zea mays L.)- based cropping systems on physical, saturated, and near-saturated hydraulic properties in a sandy loam soil of North-Western India. Split-plot experimental design was adopted with tillage [conventional tillage (CT), zero tillage (ZT), and permanent raised bed (PB)] as the main plot treatments and intensified crop rotations [Maize (Zea mays L.)-Wheat (Triticum aestivum)-Greengram (Vigna radiata L.) (MWGg), Maize-Chickpea (Cicer arietinum L.)-Sesbania (Sesbania aculeata) (MCpSb), Maize-Mustard (Brassica juncea) -Greengram (MMuGg) and MaizeMaize-Sesbania (MMSb)] as subplot treatments. The saturated and near-saturated soil hydraulic conductivity were derived from steady-state infiltration rates measured using a hood infiltrometer on the surface soil at 0, - 1, and - 3 cm pressure heads. The long-term (10 years) study revealed that the bulk density (BD) of the soil under conservation agriculture (CA) practices (PB and ZT) was significantly (P = 0.05) lower than that in CT practices. The soil BD in the MCpSb cropping system was measured to be the lowest (1.24 g cm- 3 ) among all the cropping systems. The soil aggregate mean weight diameter (MWD) under PB and ZT was determined to be 31% and 27% higher than in the CT treatments. In tillage × cropping systems interactions, the highest MWD was observed in the PB×MWGg. The saturated and near-saturated hydraulic conductivity (K(h)) were estimated to have higher values in CA practices (PB and ZT) than in the CT treatments. In the case of cropping systems, the soil’s mean field saturated hydraulic conductivity was estimated to be significantly (P < 0.05) higher under the MWGg, MCpSb, and MMuGg than the MMSb. The present study indicates that conservation agriculture-based crop management with diversified maize-based rotation (MCpSb, MWGg, and MMuGg) could be promising alternatives to conventional tillage practices (CT). Among the cropping system choices, MWGg was more effective in improving the soil’s hydro-physical properties in the study area.
3 Sawadogo, A.; Dossou-Yovo, E. R.; Kouadio, L.; Zwart, Sander J.; Traore, F.; Gundogdu, K. S. 2023. Assessing the biophysical factors affecting irrigation performance in rice cultivation using remote sensing derived information. Agricultural Water Management, 278:108124. [doi: https://doi.org/10.1016/j.agwat.2022.108124]
Irrigation schemes ; Performance ; Irrigated rice ; Biophysics ; Remote sensing ; Crops ; Water productivity ; Soil physical properties ; Chemical properties ; Sustainable agriculture ; Energy balance ; Evapotranspiration ; Satellite imagery ; Modelling ; Machine learning / Africa South of Sahara / Burkina Faso / Kou Valley Irrigation Scheme
(Location: IWMI HQ Call no: e-copy only Record No: H052098)
https://www.sciencedirect.com/science/article/pii/S0378377422006710/pdfft?md5=29cdb70d642d66a000cdb8ba5d31ed7d&pid=1-s2.0-S0378377422006710-main.pdf
https://vlibrary.iwmi.org/pdf/H052098.pdf
https://vlibrary.iwmi.org/pdf/H052098.pdf
(6.64 MB) (6.64 MB)
Identifying the biophysical factors that affect the performance of irrigated crops in semi-arid conditions is pivotal to the success of profitable and sustainable agriculture under variable climate conditions. In this study, soil physical and chemical variables and plots characteristics were used through linear mixed and random forestbased modeling to evaluate the determinants of actual evapotranspiration (ETa) and crop water productivity (CWP) in rice in the Kou Valley irrigated scheme in Burkina Faso. Multi-temporal Landsat images were used within the Python module for the Surface Energy Balance Algorithm for Land model to calculate rice ETa and CWP during the dry seasons of 2013 and 2014. Results showed noticeable spatial variations in PySEBAL-derived ETa and CWP in farmers’ fields during the study period. The distance between plot and irrigation scheme inlet (DPSI), plot elevation, sand and silt contents, soil total nitrogen, soil extractable potassium and zinc were the main factors affecting variabilities in ETa and CWP in the farmers’ fields, with DPSI being the top explanatory variable. There was generally a positive association, up to a given threshold, between ETa and DPSI, sand and silt contents and soil extractable zinc. For CWP the association patterns for the top six predictors were all non-monotonic; that is a mix of increasing and decreasing associations of a given predictor to either an increase or a decrease in CWP. Our results indicate that improving irrigated rice performance in the Kou Valley irrigation scheme would require growing more rice at lower altitudes (e.g. < 300 m above sea level) and closer to the scheme inlet, in conjunction with a good management of nutrients such as nitrogen and potassium through fertilization.
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