Semi-Arid Tropical (SAT) regions are influenced by climate change impacts affecting the rainfed crops in their productivity and production. Water Footprint (WF) assessment for rainfed crops on watershed scale is critical for water resource planning, development, efficient crop planning, and, better water use efficiency. A semi-arid tropical watershed was selected in lower Krishna river basin having a 4700 ha area in Telangana, India. Soil and Water Assessment Tool (SWAT) was used to estimate the water balance components of watershed like runoff, potential evapotranspiration, percolation, and effective rainfall for base period (1994 to 2013) and different climate change scenarios of Representative Concentration Pathways (RCP) 2.6, 4.5 and 8.5 for the time periods of 2020, 2050 and 2080. Green and blue WF of rainfed crops viz., maize, sorghum, groundnut, redgram and cotton were performed by considering rainfed, and two critical irrigations (CI) of 30mm and 50mm. It indicated that the effective rainfall (ER) is less than crop evapo-transpiration (ET) during crop growing period under different RCPs, time periods, and base period. The green WF under rainfed condition over different RCPs and time periods had decreasing trend for all crops. The study suggested that in the rainfed agro-ecosystems, the blue WF can significantly reduce the total WF by enhancing the productivity through critical irrigation management using on farm water resources developed through rainwater harvesting structures. The maximum significant reduction in WF over the base period was observed 13–16% under rainfed, 30–32% with 30 mm CI and 40–42% with 50 mm CI by 2080. Development of crop varieties particularly in oilseeds and pulses which have less WF and higher yields for unit of water consumed could be a solution for improving overall WF in the watersheds of SAT regions.

To make rainfed agriculture an economically viable enterprise for improving the livelihood and welfare of the farming communities contributing around 40 percent of the total food production in India, it is vital to implement best management practices to keep soils healthy, conserve agronomic inputs, minimize environmental impacts, and produce adequate yields. Increases in the sudden downpour of rain invites a high amount of soil loss from agricultural fields, eroding the uppermost soil layer. Permanent fodder grass strips effectively trap sediments and check nutrient removal from soil on one hand and on other meet the green fodder demands of small ruminants. However, nutrients removed by erosion create a limitation on land productivity. It has been observed that grass systems are useful for the improvement of other soil properties (soil physical and biological properties, for example) related to soil erosion control, slope stabilization, and food production. Hence, this study brought out the impact of grass-strip-based cropping systems on the sustainability of rainfed farming. Fields with grass strips improved their soil quality from 0.39 to 0.52 over a four-year period. This concept of growing grasses on both sides of a field (in a one-meter strip) in areas of loamy fine sand to sandy loam textured soils improves soil health and significantly reduces runoff from cropped fields. A permanent belt of Brachiaria ruziziensis and Stylosanthes hamata in two meter widths was established at every fifteen meters across the direction of the slope and reduced soil loss by 65–70 percent. This mechanization of friendly technology provides sufficient green fodder for small ruminants. A castor–redgram rotation with fodder grass strips (especially Brachiaria ruziziensis) on the upper and lower sides of the slopes fetched better crop productivity, and thus the total returns increased from 137,022 rupees/ha to 178,689 rupees/ha. The use of grass strips is a low-cost measure for soil conservation, especially for slowing down the run-off from sudden downpours of high intensity. This study may aid researchers and managers in helping farmers with this low-cost and viable technology.

Rainfed agriculture, though resource-poor, contributes to around 40 percent of total food production in India. Fodder grass-strip-based systems improve soil’s physical and biological properties, control soil erosion, and help in slope stabilization without compromising productivity. Permanent fodder grass strips can effectively check the depletion of soil nutrients and can also act as sediment traps vis-à-vis meeting the green fodder requirement for small ruminants. This study was carried out with the major objective to quantify the impact of grass-strip-based cropping systems on soil quality. Further fodder quality assessment was carried out using the grass quality index for small ruminant feed and the profitability of different treatments was analyzed. Random block design (RBD) with three treatments which included two types of fodder grass (Brachiaria ruziziensis and Stylosanthes hamata) on both sides of the cropped field was used for the study. The results showed that the soil quality increased from 0.39 to 0.52 and the runoff reduced significantly with soil loss reduction by 65-70 percent. The fodder quality assessment showed that the palatability of Stylosanthes hamata and Brachiaria ruziziensis was about 65 percent and 40 percent, respectively. The fodder grass strip increased the net returns by 30 percent. This easily adaptable natural resource management technology reduces soil nutrient loss and will help resource-poor rainfed farmers to maintain soil health and productivity under variable rainfall conditions with fair support to small ruminants.