نتایج جستجو برای: water use productivity

تعداد نتایج: 2281676  

2000
M. W. Rosegrant C. Ringler X. Cai A. Keller G. Donoso

Increasing competition for water across sectors increases the importance of the river basin as the appropriate unit of analysis to address the challenges facing water resources management; and modeling at this scale can provide essential information for policymakers in their resource allocation decisions. This paper introduces an integrated economic–hydrologic modeling framework that accounts f...

Journal: :Crop Science 2021

A long fallow period (?15 mo) in a winter wheat (Triticum aestivum L.)–fallow rotation (W-F) cropping system is meant to store soil water for the following crop but loss of quality, low precipitation use-efficiency, and increased cost management are among its drawbacks. Replacing portion with short-season cover may alleviate these The objectives this study were evaluate available at planting (A...

Journal: :Frontiers in forests and global change 2021

The efficiency of the water transport system in trees sets physical limits to their productivity and use. Although coordination carbon assimilation hydraulic functions has long been documented, mutual inter-relationships between wood anatomy, use have not yet jointly addressed comprehensive field studies. Based on observational data from 99 Indonesian rainforest tree species 37 families across ...

Journal: :پژوهش آب در کشاورزی 0
ساناز محمدی دانشجوی کارشناسی ارشد مهندسی آبیاری و زهکشی، دانشگاه تربیت مدرس، تهران. سید مجید میرلطیفی دانشیار گروه مهندسی آبیاری و زهکشی، دانشکده کشاورزی دانشگاه تربیت مدرس، تهران. مهدی اکبری دانشیار موسسه تحقیقات فنی و مهندسی کشاورزی، کرج.

irrigation scheduling means applying the right amount of water at the right time. in this research, thecurrent irrigation scheduling implemented in the mirza-kuchak-khan sugarcane agro-industry farmslocated in ahwaz was compared with the actual sugarcane crop water requirement using swapmodel. due to lack of field measured data, the swap model was calibrated and evaluated usinglandsat 7 etm+ im...

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