lysimeter tests were conducted on shallow groundwater that supplies part of the maize water requirements to determine crop yield. twenty-four 0.8 m diameter lysimeters were buried in the test field at a depth of 1.2 m. the lysimeters were filled with the field soil (silty loam) and planted with summer maize. the groundwater depth in the lysimeters was set at 0.6 m using marriotte bottles. three...

Water use efficiency is essential in semiarid regions of Spain, and it can be achieved through a precise knowledge the real crop water requirements (CWR). The Food Agriculture Organization United Nations (FAO) offers standardized coefficients to establish CWR. However, these change due different conditions, such as climatic variations cultivation practices. In this work, evapotranspiration (ETC...

This study evaluates seven evapotranspiration models and their performance in water balance studies by using lysimeter measurement data at the Mönchengladbach hydrological and meteorological station in Germany. Of the seven evapotranspiration models evaluated, three models calculate actual evapotranspiration directly using the complementary relationship approach, i.e. the CRAE model of Morton, ...

Estimated daily reference crop evapotranspiration (ETo) is normally used to determine the water requirement of crops using the crop factor method. Many ETo estimation methods have been developed for different types of climatic data, and the accuracy of these methods varies with climatic conditions. In this study, pair−wise comparisons were made between daily ETo estimated from eight different E...

Evapotranspiration is one of the key elements water balance in nature. It significantly influences supply unsaturated zone a soil profile. The source for biosphere. aim this study to measure, calculate and analyze course actual evapotranspiration, precipitation dew totals as well flows at lower boundary change content specified volume. measurements are used verifying results numerical simulatio...