نتایج جستجو برای: optimal cropping pattern

تعداد نتایج: 713392  

Journal: :IEEE Signal Processing Letters 2007

2015
Haiming Tang Xiaoping Xiao Wenguang Tang Ke Wang Jimin Sun Weiyan Li Guangli Yang

Residue management in cropping systems is useful to improve soil quality. However, the studies on the effects of residue management on methane (CH4) and nitrous oxide (N2O) emission from paddy field in southern China are few. Therefore, the emissions of CH4 and N2O were investigated in double cropping rice (Oryza sativa L.) systems with different winter covering crops using the static chamber-g...

2016
Zhenping Yang Wenping Yang Shengcai Li Jiaomin Hao Zhifeng Su Min Sun Zhiqiang Gao Chunlai Zhang

As the major crops in north China, spring crops are usually planted from April through May every spring and harvested in fall. Wheat is also a very common crop traditionally planted in fall or spring and harvested in summer year by year. This continuous cropping system exhibited the disadvantages of reducing the fertility of soil through decreasing microbial diversity. Thus, management of micro...

Journal: :ACM Transactions on Algorithms 2013

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سید صفدر حسینی استاد گروه اقتصاد کشاورزی، دانشکدة اقتصاد و توسعة کشاورزی، دانشگاه تهران محمدرضا نظری دانشجوی دکتری گروه اقتصاد کشاورزی، دانشکدة اقتصاد و توسعة کشاورزی، دانشگاه تهران شهاب عراقی نژاد دکتری مهندسی منابع آب و استادیار گروه آبیاری و آبادانی، دانشگاه تهران

agriculture is one of the main sectors affected by climate change. although recently some studies about the nature and size climate change effect on the physical variables of water resources and agriculture have been done, however economic perspectives and the role of adaptation strategies have been less studied empirically. the contribution of this study is modeling real economic behavior of s...

2018
Kyle Hartman Marcel G A van der Heijden Raphaël A Wittwer Samiran Banerjee Jean-Claude Walser Klaus Schlaeppi

BACKGROUND Harnessing beneficial microbes presents a promising strategy to optimize plant growth and agricultural sustainability. Little is known to which extent and how specifically soil and plant microbiomes can be manipulated through different cropping practices. Here, we investigated soil and wheat root microbial communities in a cropping system experiment consisting of conventional and org...

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