نتایج جستجو برای: Irrigation scheduling

تعداد نتایج: 110375  

2004
BRADLEY A. KING JEFFREY C. STARK DENNIS C. KINCAID

I ncreasing production efficiency is becoming a major theme for producers in order to maintain or increase their economic return in an increasingly competitive global market. In the case of irrigated agriculture, producers must also address increasing public concern about water conservation, water quality, and environmental protection. Two irrigation management issues require attention in order...

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...

2013
R. Usman

Irrigation systems are as old as man itself since agriculture is the foremost occupation of civilized humanity. To irrigate large areas of plants is an onerous job. In order to overcome this problem many irrigation scheduling techniques have been developed which are mainly based on monitoring the soil, crop and weather conditions. Irrigation scheduling engrosses when to irrigate and how much wa...

2013
S K Saleem K B Dassanayake L Liu M N Halgamuge H Malano

Irrigation underpins agricultural productivity. The purpose of irrigation is to match water supply to crop water demand. The effectiveness of irrigation depends on the quality of the timing and duration of watering events, also called irrigation scheduling. Most farmers use heuristic rules to determine irrigation events. This often leads to over-watering which results in lower crop yields and w...

2002
N W MAZIBUKO P L GREENFIELD M A JOHNSTON

In surface irrigation, the soil serves as a medium for infiltration and conveying water from upstream to the downstream end of a field. In this study, infiltration properties of the Sibaya (Si) soil series (Glenrosa in the South African soil classification system) were determined by a volume balance method using a two-point approach technique. The purpose of the study was to examine the effect ...

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...

2018
Susan A. O'Shaughnessy Steven R. Evett Paul D. Colaizzi Terry A. Howell S. A. O’Shaughnessy S. R. Evett P. D. Colaizzi T. A. Howell

Automatic irrigation scheduling has been demonstrated using wired sensors and sensor network systems with subsurface drip and moving irrigation systems. However, there are limited studies that report on crop yield and water use efficiency resulting from the use of wireless networks to automatically schedule and control irrigations. In this 2011 study, a multinode wireless sensor network (WSN) s...

2006
Mostafa Khalil Iman Hassan Mohamed Rasmy Ahmed A. Rafea

This paper presents configuration of knowledge to solve irrigation scheduling problem in agriculture domain and a general approach for configuration management knowledge throughout the integration between operations research and expert systems approach. This work has established new configuration structure for an Irrigation Scheduling Configuration System suitable for CommonKADS Layers to produ...

2004
F Olivier A Singels

Effective irrigation scheduling is a prerequisite to optimising the use of expensive irrigation water for sugarcane production in South Africa. Accurate irrigation scheduling is not widely practised in the sugar industry despite the many scheduling tools available to sugarcane growers. This leads to very low water use efficiencies (WUE) of approximately 50% of what could be achieved theoretical...

2011
N. Schütze M. de Paly U. Shamir

The scarcity of water compared with the abundance of land constitutes the main drawback within agricultural production. Besides the improvement of irrigation techniques a task of primary importance is solving the problem of intra-seasonal irrigation scheduling under limited seasonal water supply. An efficient scheduling algorithm has to take into account the crops’ response to water stress at d...

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