نتایج جستجو برای: arable lands

تعداد نتایج: 13807  

2000
Audun Korsaeth Ragnar Eltun

For a cropping system to be sustainable, should not only the soil nitrogen (N) content be preserved but also the N runoff be minimised. Finding a simple but robust way to estimate N runoff would thus be a great advantage when evaluating cropping systems. In this study all major N flows in six different cropping systems, each covering 0.18 ha of a separately pipe drained field lysimeter, located...

2011
Mamta Awasthi Rajiv Kumar Singh

Microalgal biofuels are a viable alternative for clean, economical and sustainable sources of energy. The research and development of micro-algae needs a massive boost to ease the technical difficulties to overcome the large cost advantage of other biofuel feed stocks. It is a large source of biomass on non-arable lands and capture of CO2. Lipids produced from algae contain saturated and polar ...

2016
Chengjie Ren Pingsheng Sun Di Kang Fazhu Zhao Yongzhong Feng Guangxin Ren Xinhui Han Gaihe Yang

In the present paper, we investigated the effects of afforestation on nitrogen fractions and microbial communities. A total of 24 soil samples were collected from farmland (FL) and three afforested lands, namely Robinia pseudoacacia L (RP), Caragana korshinskii Kom (CK), and abandoned land (AL), which have been arable for the past 40 years. Quantitative PCR and Illumina sequencing of 16S rRNA g...

2015
Marek K. Jarecki Rattan Lal Randy James

Soil organic carbon (SOC) pool is the largest among terrestrial pools. The restoration of SOC pool in arable lands represents a potential sink for atmospheric CO2. Restorative management of SOC includes using organic manures, adopting legume-based crop rotations, and converting plow till to a conservation till system. A field study was conducted to analyze soil properties on two farms located i...

2011
Mark McConnell M. McConnell

The USDA Farm Bill conservation programs provide landowner incentives to remove less productive and environmentally sensitive lands from agricultural production and reestablish them in natural vegetation (e.g., native grasses, trees, etc.) to achieve conservation objectives. However, removal of arable land from production imposes an opportunity cost associated with loss in revenue from commodit...

2008
S. O. Ojo

The study examined the effects of land acquisition for large scale farming on the performance; productivity and technical efficiency of small-scale farming in Nigeria. The primary data for the study were collected from 200 small-scale farmers selected using the multistage sampling technique, from three local government areas in Ondo State, Nigeria. The farmers were grouped into Group A: farmers...

2015
Igone Palacios-Agundez Miren Onaindia Marion Potschin Jamie A. Tratalos Iosu Madariaga Roy Haines-Young

Participatory ecosystem services scenarios can be used to inform decision making on the sustainable or wise use of biodiversity and ecosystem services (ES). To establish the plausibility and coherency of the recently constructed Biscay participatory scenarios, and to analyze policy options for improving sustainability of land use and the supply of ecosystem services, a spatially explicit analys...

2015
Xilong Liang Yiling Liu Lixia Xie Xiaodan Liu Yi Wei Xiaoyang Zhou Shihong Zhang

High salt in soils is one of the abiotic stresses that significantly reduces crop yield, although saline lands are considered potential resources arable for agriculture. Currently, genetic engineering for enhancing salt tolerance is being tested as an efficient and viable strategy for crop improvement. We previously characterized a large subunit of the ribosomal protein RPL44, which is involved...

Journal: :Remote Sensing 2014
Yichen Tian Kai Yin Dengsheng Lu Lizhong Hua Qianjun Zhao Meiping Wen

Land use and land cover (LULC) datasets for Beijing in 1978, 1987, 1992, 2000 and 2010 were developed from Landsat images using the object-oriented classification approach. The relationships between social-economic, demographic and political factors and time-series LULC data were examined for the periods between 1978 and 2010. The results showed the effectiveness of using the object-oriented de...

Journal: :Environmental management 2009
Sara G Baer David M Engle Johannes M H Knops Kenneth A Langeland Bruce D Maxwell Fabian D Menalled Amy J Symstad

Vast areas of arable land have been retired from crop production and "rehabilitated" to improved system states through landowner incentive programs in the United States (e.g., Conservation and Wetland Reserve Programs), as well as Europe (i.e., Agri-Environment Schemes). Our review of studies conducted on invasion of rehabilitated agricultural production systems by nontarget species elucidates ...

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