نتایج جستجو برای: continuous cropping

تعداد نتایج: 270193  

Ali Gholami Khoshnaz Payandeh, Mahsa Nikobakht

Conducting research on monitoring contaminated fields by heavy metals is necessary in order to achieve sustainable agriculture, increase product quality and keep public health. This study was carried out using split plot experiment based on randomized complete blocks design with three replications during 2014-2015 in Shavor Agricultural Research Center in order to evaluate the effect of croppin...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده کشاورزی 1388

چکیده ندارد.

2003
Mark A. Liebig Gary E. Varvel

tices on agroecosystem functions is necessary to determine the sustainability of cropping systems. Agricultural sustainability is enhanced by management practices Performance-based indices have been used to assess that optimize the performance of multiple agroecosystem functions. the effects of management practices on agroecosystem The performance of western Corn Belt cropping systems was evalu...

2015
Md. Ruhul Amin Junbiao Zhang Mingmei Yang

The crops that we grow for food need specific climatic conditions to show better performance in view of economic yield. A changing climate could have both beneficial and harmful effects on crops. Keeping the above view in mind, this study is undertaken to investigate the impacts of climate change (viz. changes in maximum temperature, minimum temperature, rainfall, humidity and sunshine) on the ...

Journal: :Kansas Agricultural Experiment Station Research Reports 2021

A limited irrigation study involving four cropping systems and evaluating crop rotations was initiated at the Southwest Research-Extension Center near Tribune, KS, in 2012. The were two annual (continuous corn continuous grain sorghum) 2-year (corn-grain sorghum corn-winter wheat). In 2020, yields similar for all rotations, although averaged across past 8 years, greater following wheat than cor...

Journal: :Remote Sensing 2010
Stefan Siebert Felix T. Portmann Petra Döll

This study presents a global scale analysis of cropping intensity, crop duration and fallow land extent computed by using the global dataset on monthly irrigated and rainfed crop areas MIRCA2000. MIRCA2000 was mainly derived from census data and crop calendars from literature. Global cropland extent was 16 million km around the year 2000 of which 4.4 million km (28%) was fallow, resulting in an...

2017
Wei-Kai Chen Xian-Jin Bai Mu-Ming Cao Guo Cheng Xiong-Jun Cao Rong-Rong Guo Yu Wang Lei He Xiao-Hui Yang Fei He Chang-Qing Duan Jun Wang

A double cropping system has been commercially adopted in southern China, where there is abundant sunshine and heat resources. In this viticulture system, the first growing season normally starts as a summer cropping cycle; then, the vine is pruned and forced, resulting in a second crop in winter. Due to climate differences between the summer and winter growing seasons, grape ripening progressi...

2002
C. A. Robinson

Time, fertilizer, tillage, and cropping systems may alter soil organic carbon (SOC) levels. Our objective was to determine the effect of long-term cropping systems and fertility treatments on SOC. Five rotations and two N fertility levels at three Iowa sites (Kanawha, Nashua, and Sutherland) maintained for 12 to 36 yr were evaluated. A 75-yr continuous corn (Zea mays L.) site (Ames) with a 40-y...

2009
G. Subba Reddy V Maruthi

Rainfed agriculture occupies 68% of India’s cultivated area and supports 40% of the human and 60% of the livestock population. It produces 445 of the food requirement, thus has and will continue to play a critical role in India’s food security. However, aberrant behaviour of monsoon rainfall, eroded and degraded soils with multiple nutrient and water deficiencies, declining ground water table a...

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