Rajan Bhatt

By Rajan Bhatt and Akbar Hossain

The chapter provides an inclusive information related to the adverse effect of climate change on sustainable crop production through understanding evaporation, transpiration as well as evapotranspiration. It is anticipated that water availability in arid and semi-arid regions across the world will decrease, due to lack of rainfall and increase the temperature which leads to increase in the dry areas. Since climate change will impact on soil water balance that leads to change in evaporation and plant transpiration. While, with the increasing temperature, lack of precipitation and soils water unavailability, crop production will likely to decrease through shortening the crop growth cycle. While soils with high water holding capacity and crop cultivars which are tolerant to adverse effect as well as the application of improved management strategies will be better to reduce the impact of drought. Similarly, if the irrigated areas will be expanded, the total crop production will be increased that ultimately lead to increase the food security of increasing population.

Part of the book: Advanced Evapotranspiration Methods and Applications

By Rajan Bhatt and Ram Swaroop Meena

Root architecture in soils is directly affecting crop yield potential, through influencing the moisture potential of soil and its balance components, as only transpiration share is useful for them. Soil moisture potential responsible for the soil moisture curves on the basis of differential energy states is quite important. Generally, a soil moisture flow rate is considered for its kinetic energy. Consequently, soil moisture energy state is defined by its equivalent potential energy, which is by virtue of its place in a force field which could assist to improve the water-use efficiency. Irrigation water losses significantly occur under the flood irrigation through evaporation, seepage, and drainage. While the soil moisture potential declines with help of the tensiometer, and significantly save the irrigation water. For evaluating the performance of any resource conservation technologies (RCT) in the region, estimation of the evapotranspiration (ET) is very important to analyze the effect of the RCT. It is also helpful in balancing the nutrient inflows in the plants through roots, which results to the improvement of land and water productivity. Hence, delineation of the soil moisture potentials and moisture balance components is important to improve the land as well as water productivity; it makes the livelihood security better in the water-stressed regions on the globe. This chapter deals with the methodological part of soil moisture potentials and moisture balance components, which is useful for the policymakers, modelers, scientists, students, and teachers engaged in the irrigation experiments under texturally divergent soils.

Part of the book: Soil Moisture Importance