Agricultural monitoring is necessary for efficient food security management at country level. Typically, monitoring requirement from the point of view of an agricultural/irrigation manager would be to “see” each field at a regular interval to which 15 days is reasonable. Evapotranspiration (ETa) is converting the water into crop, and is therefore a crucial indicator of crop productivity. ETa ca...

Satellite-based evapotranspiration and crop coefficient for irrigated sorghum in the Gezira scheme, Sudan M. A. Bashir, T. Hata, A. W. Abdelhadi, H. Tanakamaru, and A. Tada Dept. of Food Systems and Field Sciences, Graduate School of Science and Technology, Kobe University, Nada, Kobe 657–8501, Japan Agricultural Research Corporation, PO Box 126, Wad Medani, Sudan Faculty of Agriculture, Kobe U...

Evapotranspiration (ETc) partitioning and obtaining of FAO56 dual crop coefficient (Kc) for olive was carried out with the SIMDualKc software application for root zone and topsoil soil water balance based on the dual crop coefficients. A simplified two source-energy balance model (STSEB), based on daily remotely sensed soil and canopy thermal infrared data and retrieval of surface fluxes, also ...

During three consecutive years (1991-93), a field experiment was conducted in 3n intensively irrigated agricultural sail in SW Spain. The maio objective of tbis study was to determine the water flow and nitrate leaching below tbe root zone~ under an irrigated maize crop and after the growing season (bare soil and rainy periad). The experiment was carried out on a furrow irrigated maize crop usi...

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...

Being a mountainous country, Armenia has undergone different kinds of natural disasters, such as droughts, floods, and storms, which have a direct influence on economy and are expected to occur more frequently in terms of climate change, raising the need to estimate economic vulnerability especially in agricultural sector. Agriculture plays a great role in national economy of Armenia, with 21% ...

PALAVRAS-CHAVE Irrigação Distribuição Gama Uso da água ABSTRACT: The occurrence, distribution of rainfall and the knowledge of crop water demand are essentials to irrigation planning. Thus, the determination of probable rainfall can contribute substantially to suitable irrigation projects. This work aimed to determine the probable rainfall for Uberlândia, Minas Gerais state, Brazil, in order to...

The monitoring of irrigation requirements at district or regional scale can be based on the use of ecological process-based models and remote sensing data. The former simulates the time evolution (usually at daily scale) of the main biophysical variables which determine crop photosynthesis and water consumption rates; the latter allows to provide the spatial distribution of these variables over...