نتایج جستجو برای: cropping system

تعداد نتایج: 2237513  

2013
Y Liang X Lin S Yamada M Inoue K Inosako

Soil degradation has been a very serious problem for sustainable production, especially by a re-cropping of greenhouse-cultivated cucumber (Cucumis statirus L.). The aim of this research was to expound the actuality for soil degradation, at the same time, put forward some suggestion for preventing from soil degradation and maintain sustainable production in greenhouse basic on the two experimen...

2015
Yantai Gan Chantal Hamel John T. O’Donovan Herb Cutforth Robert P. Zentner Con A. Campbell Yining Niu Lee Poppy

Agriculture in rainfed dry areas is often challenged by inadequate water and nutrient supplies. Summerfallowing has been used to conserve rainwater and promote the release of nitrogen via the N mineralization of soil organic matter. However, summerfallowing leaves land without any crops planted for one entire growing season, creating lost production opportunity. Additionally, summerfallowing ha...

2017
Raphaël A. Wittwer Brigitte Dorn Werner Jossi Marcel G. A. van der Heijden

A major challenge for agriculture is to enhance productivity with minimum impact on the environment. Several studies indicate that cover crops could replace anthropogenic inputs and enhance crop productivity. However, so far, it is unclear if cover crop effects vary between different cropping systems, and direct comparisons among major arable production systems are rare. Here we compared the sh...

2014
Jyoti Rani Kanwal Garg

The premise of this paper is to design an interface that can detect human face and obtain the face images which have normalized intensity, uniform size and shape. In this paper a system is developed for face extraction and cropping from consecutive video frames. The developed system can be divided into two main parts. First is face detection and extraction, second is normalization and cropping ...

2014
Md Khairul Alam Md Monirul Islam Nazmus Salahin Mirza Hasanuzzaman

This study was conducted to know cropping cycles required to improve OM status in soil and to investigate the effects of medium-term tillage practices on soil properties and crop yields in Grey Terrace soil of Bangladesh under wheat-mungbean-T. aman cropping system. Four different tillage practices, namely, zero tillage (ZT), minimum tillage (MT), conventional tillage (CT), and deep tillage (DT...

2002
T. M. Shaver G. A. Peterson L. R. Ahuja D. G. Westfall L. A. Sherrod

crops every 3 yr) and even continuous (annual) cropping in some instances. For example, annualized grain yields Water is the principle limiting factor in dryland cropping systems. for WCF are 75 to 100% greater than WF (Peterson et Surface soil physical properties influence infiltration and cropping al., 2000). Cropping intensification has been possible systems under no-till management may affe...

2010
Harold P. Collins

Conventional field cropping systems have been criticized as being unsustainable because they contribute to on-farm and off-farm environmental degradation, and are often economically uncertain. Methods to increase environmental and economic sustainability are needed. There is a critical need to develop management technologies to maximize yield and crop quality yet improve environmental impacts o...

Journal: :Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] 2018
Jiaqi Cui Li Bai Xiaorui Liu Weiguang Jie Baiyan Cai

Arbuscular mycorrhizae (AM) fungi play a crucial role in the growth of soybean; however, the planting system employed is thought to have an effect on AM fungal communities in the rhizosphere. This study was performed to explore the influence of continuous soybean cropping on the diversity of Arbuscular mycorrhizal (AM) fungi, and to identify the dominant AM fungus during the seedling stage. Thr...

Journal: :Mathematical and Computer Modelling 2011
Jingcheng Zhang Jihua Wang Xiaohe Gu Juhua Luo Wenjiang Huang Kun Wang

The assessment of sustainability in cropping system is an important issue for natural resources management and environmental protection. Incorporating the geographical information system (GIS) and remote sensing (RS) technologies, an initial idea of the crop sustainability assessing system was thus proposed, based on ecosystem services value (ESV) assessing criterions. The system is basically c...

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