increasing water use efficiency is one of the cases to arrivance to the stability production. in order to estimation and comparison of water use efficiency among crop species including corn, safflower, sesame ,and medicinal species including hemp, marsh mallow, white mallow. an experiment was conducted during 2009 growing seasons in the agriculture research station ferdowsi of mashhad. the expe...

optimum uses of water and nitrogen resources are the most important factors in agricultural systems due to limitations of agricultural inputs especially water. in order to investigate the effect of different levels of nitrogen fertilizer and irrigation on efficiency and productivity of water consumption in three crop (sugar beet, corn and sesame) an experiment was carried out as strip split plo...

abstract in this study, impact of climate change on net irrigation requirement (in) and yield of wheat using cgcm3 climate projection model, one of the aogcm models, in behshahr area is evaluated. changes in temperature and precipitation were simulated run under the ipcc scenario a2 for 2011-2040, 2041-2070 and 2071-2100 periods. this work was done by using statistical and proportional downscal...

this study was conducted to determine the potential evapotranspiration (pet) of maize, the crop coefficient (kc) under full water requirement as well as the cause of decrease in maize yield. it was determined that the seasonal pet of maize is about 486.6 mm. the kc under full water supply was found to be: 0.11, 0.35, 1.51 and 0.34 for initial, development, midseason and the late season stages r...

The present study investigates remote sensing based approach of large-area crop water requirement using vegetation indices as proxy indicator of crop coefficient (Kc). This study is an attempt to estimate the reasonably proper Kc for lowland rice and wheat and subsequently crop evapotranspiration (ETc) in rice-wheat system using multitemporal IRS P6-AWiFS data integrated with meteorological dat...