نتایج جستجو برای: crop management

تعداد نتایج: 907711  

2011
Z. Zalud G. S. McMaster Wallace Wilhelm Z. Žalud

Improving current cultural practices often involves more precise timing of the management activity based on crop development. Using crop simulation models to predict crop development and phenology has several problems. First, most existing models do not simulate sufficient developmental and phenological detail required to optimize selected management practices. Second, crop models normally emph...

2000
Satya Priya Ryosuke SHIBASAKI

Traditional decision support systems based on crop simulation models are normally site-specific. In policy formulation, however, spatial variability of crop production often need to be evaluated due to different soil conditions, weather conditions and agricultural practices within a target-region. To address the spatial variability, a spatial model “Spatial EPIC” was developed based on a crop s...

2013
S. K. Singh Sujay Dutta Nishith Dharaiya

Crop coefficient values are used to estimate crop evapotranspiration (ETc) for determining irrigation scheduling. Many important crop biophysical properties such as Percentage Vegetation Cover and Leaf Area Index can be estimated from remotely sensed Vegetation Index, in order to quantify real time vegetation growth dynamics. The objective of this study was to understand the effectiveness of ba...

Journal: Desert 2015

Climate change has direct and indirect consequences on crop production and food security. Agriculture and cropproduction is one of the factors which depend on the weather conditions and it provides the human requirements inmany aspects. The objective of this study is to assess the impacts of future climatic change on irrigated rice yieldusing the CERES-Rice model in the Southern Coast of Caspia...

2012
Kimberley J. Hockings Matthew R. McLennan

Crop-raiding is a major source of conflict between people and wildlife globally, impacting local livelihoods and impeding conservation. Conflict mitigation strategies that target problematic wildlife behaviours such as crop-raiding are notoriously difficult to develop for large-bodied, cognitively complex species. Many crop-raiders are generalist feeders. In more ecologically specialised specie...

2002
Yu Zhang Changsheng Li Xiuji Zhou Berrien Moore

Predicting impacts of climate change or alternative management on both food production and environment safety in agroecosystems is drawing great attention in the scientific community. Most of the existing agroecosystem models emphasize either crop growth or soil processes. This paper reports the latest development of an agroecosystem model (Crop-DNDC) by integrating detailed crop growth algorit...

2005
Sakiko Hirose Hiroyuki Kawahigashi

Pesticides have played very important roles against food shortages and plant diseases, and our modern life would be vastly different without their use. Weed infestation adversely affects crop production by reducing yields and decreasing market prices of the crop. For cost-effective land use, crop yield and price must be maximized, and the cost of weed control minimized. Herbicides substantially...

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