نتایج جستجو برای: irrigation cutoff

تعداد نتایج: 61000  

2016
Snigdha Thakur

Local wound debridement in the diseased pulp space is the main step in root canal treatment to prevent the tooth from being a source of infection. Successful root canal therapy is always based on the combination of proper instrumentation, irrigation and obturation of the root canal. Of these three essential steps of root canal therapy, irrigation of the root canal is the most important techniqu...

2011
KAY SMARSLY KINCHO H. LAW

Water shortage is a global problem that has severe implications on economic growth and societal well-being, even in the most developed countries. As more than two-thirds of freshwater consumed worldwide are used for irrigation, large quantities of freshwater can be saved by improving the efficiency of irrigation systems. Automatically scheduling irrigation events based on soil moisture measurem...

2006
HOWARD SKINNER GERALD E. SCHUMAN

Rangeland plant productivity and species composition are affected by moisture availability and grazing intensity. We examined warmand cool-season grass productivity and relative distribution on grazed and ungrazed sites, receiving either natural precipitation or precipitation plus limited supplemental irrigation. The amount of additional water varied depending on rainfall during the previous we...

2016
Yaming Zhai Qian Yang Yunyu Wu

To investigate better saline water irrigation scheme for tomatoes that scheduling with the compromise among yield (Yt), quality, irrigation water use efficiency (IWUE) and soil salt residual, an experiment with three irrigation quotas and three salinities of irrigation water was conducted under straw mulching in northern China. The irrigation quota levels were 280 mm (W1), 320 mm (W2) and 360 m...

2014
T. Subramani S. Badrinarayanan K. Prasath S. Sridhar

Evaluation of any irrigation project involves the assessment of area, improved by the project. Irrigated agriculture will play a major role in determining the future food security of most Asian countries, and it will also be the major contributor to the additional food production required as world population expands. Therefore, it is important to raise the agricultural performance of low produc...

2015
Bin Guo Weihong Li Jinyun Guo Chuanfa Chen

Irrigation water demand accounts for more than 95% of the total water use in the Kaidu-kongqi River Basin. Determination of the spatial and temporal trends in irrigation water demand is important for making sustainable and wise water management strategies in this highly water deficit region. In this study, the spatial and temporal trends in irrigation water demand as well as net crop irrigation...

Journal: :Remote Sensing 2017
Carlos Zúñiga Espinoza Lav R. Khot Sindhuja Sankaran Pete W. Jacoby

Precision irrigation management is based on the accuracy and feasibility of sensor data assessing the plant water status. Multispectral and thermal infrared images acquired from an unmanned aerial vehicle (UAV) were analyzed to evaluate the applicability of the data in the assessment of variants of subsurface irrigation configurations. The study was carried out in a Cabernet Sauvignon orchard l...

2001
J.-E. BERGEZ

Irrigation scheduling is an important decision problem in agriculture. The purpose of the study presented in this paper is to compare dynamic programming (DP) and reinforcement learning (RL) methods for identifying optimal starting irrigation strategies, when a limited amount of water is available for irrigation. Both of the optimization methods use the MODERATO simulator, which includes a grow...

2004
CINDY GARRETSON JOHN TROIANO GARY RITENOUR CHARLES KRAUTER

Although water is crucial to the performance of preemergence herbicides, pesticide performance has rarely been related to irrigation management. This 2-yr study investigated the effect that amount of irrigation water applied had on activity of simazine. Three rates of simazine at 0, 1.12, and 2.24 kg/ha were applied to a 3-yr-old nectarine orchard that was irrigated with microsprinklers. The pe...

2010
A. Montazar

The great challenge of the agricultural sector is to produce more crop from less water, which can be achieved by increasing crop water productivity. The modernization of the irrigation systems offers a number of possibilities to expand the economic productivity of water and improve the virtual water status. The objective of the present study is to assess the global water productivity (GWP) with...

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