ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and temperatures, an alternative to corn, which has greater water requirements. Despite being a traditional crop the region, there are few studies on irrigation management Apodi plateau. The aim this study was determine evapotranspir...

This paper describes a knowledge-based crop recognition system, integrating remote sensing analysis and geographical information in hierarchical way. Landsat TM and Spot pan images were merged to reduce heterogeneity by enhancing field boundaries. Multi-temporal NDVI maps generated from these images were classified into eight crop types using unsupervised classification algorithm. Using agricul...

hargraves-samani method is one of the methods for calculating plant evapotranspiration that needs minimum meteorological data. in order to evaluate et-hs model in determining sugar beet crop water demand in isfahan, an experiment was conducted at research field of department of agriculture, khorasgan branch, islamic azad university, isfahan, iranin 2005. the study was based a randomized complet...

continuing agricultural expansion and urban development in saudi arabia, (located in an arid climate), together with an increased demands for more water supplies, calls for more efficient irrigation practices, and an increase in crop water productivity (cwp). throughout the present study, a deficit irrigation system was investigated for its impact on soil salinity, crop response factor (ky), cw...