نتایج جستجو برای: optimal irrigation depth

تعداد نتایج: 561413  

2009
Y. P. Mathur Gunwant Sharma

Canal scheduling is an important activity that significantly influences production of crops compared to other aspects of agriculture. Irrigation canal scheduling is the activity of preparing an optimal schedule of outlets on supply canal as per need of user, subject to canal system constraints. In this paper, the problem of optimal operational scheduling of irrigation canal with provision to op...

2010
Liang Zhang Daoxi Li Xiaoyu An

This paper develops the system of optimal allocation of water resources in irrigation district and irrigation decision support which integrates technologies of decision support, information management, information search and so on. It has the multi-function of water production function calculation, crop water requirement calculation, water resources optimal allocation and realtime amending the ...

ژورنال: علوم آب و خاک 2017

Considering water scarcity in Iran, application of deficit irrigation or water stress on some crops is inevitable. We need to provide appropriate design for deficit irrigation. Furrow irrigation management to obtain high efficiency and uniformity is difficult. Therefore, to investigate the variation of the input discharge, the cut-off time and furrow length that are effective on the efficiency ...

ژورنال: علوم آب و خاک 2006
خداکرم بارگاهی, , سیدعلی‌اکبر موسوی, ,

Limitation of suitable water resources is the most important problem of agriculture in Iran. Considering the condition of shallow and saline groundwater in many parts of Iran, and relative resistance of safflower to salinity, it is necessary to study the contribution of groundwater to water consumption of safflower. In this research, the effects of different water table depths and salinity of g...

خداکرم بارگاهی, , سیدعلی‌اکبر موسوی, ,

Limitation of suitable water resources is the most important problem of agriculture in Iran. Considering the condition of shallow and saline groundwater in many parts of Iran, and relative resistance of safflower to salinity, it is necessary to study the contribution of groundwater to water consumption of safflower. In this research, the effects of different water table depths and salinity of g...

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...

ژورنال: علوم آب و خاک 2016
دهقانی, محسن, شایان نژاد, محمد, طباطبائی, سیدحسن, مستشفی حبیب آبادی, فاطمه,

The main objective of this study was evaluation of integrated management and mixing saline/fresh water on soil salinity distribution. For this purpose, a field was selected and 32 plots were made in it with a 6 m×2.5 m size. A split plot experiment was employed with two sunflower varieties (Alstar and Hisan33), four irrigation schemes (CIS) and four replications. Irrigation schemes being ...

2017
Dimitrios Tziafas Dana Alraeesi Reem Al Hormoodi Maamoun Ataya Hessa Fezai Nausheen Aga

Background It is well recognized that disinfection of the complex root canal system at the apical root canal remains the most critical therapeutic measure to treat apical periodontitis. Material and Methods Observational and experimental data in relation to the anatomy of the apical root canal in different tooth types and the cross sectional diameters of the apical part of the most commonly u...

2006
D. Nagesh Kumar K. Srinivasa Raju B. Ashok

This paper presents a genetic algorithm GA model for obtaining an optimal operating policy and optimal crop water allocations from an irrigation reservoir. The objective is to maximize the sum of the relative yields from all crops in the irrigated area. The model takes into account reservoir inflow, rainfall on the irrigated area, intraseasonal competition for water among multiple crops, the so...

Journal: :آب و خاک 0
مریم نوابیان عبدالمجید لیاقت رضا کراچیان فریبرز عباسی

abstract optimal management of water and nutrient could consider as effective on farm method to reduce pollution because agriculture is none point pollution. in this research, an optimal model was presented to reduce nitrate loss in furrow fertigation. the optimal model contains four simulation models for predicting runoff, deep percolation, nitrate concentration in runoff and nitrate concentra...

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