نتایج جستجو برای: soil fertility reduction

تعداد نتایج: 706176  

Journal: :Journal of environmental management 2003
Sanzidur Rahman

Farmers' perception of the environmental impacts of modern agricultural technology diffusion and factors determining such awareness were examined using survey data from 21 villages in three agro-ecological regions of Bangladesh. Results reveal that farmers are well aware of the adverse environmental impacts of modern agricultural technology, although their awareness remains confined within visi...

Journal: :Journal of environmental biology 2007
N S Kulkarni J V Jaiswal M G Bodhankar

Introductions of high yielding inorganic fertilizer are not cheap and leave behind a large amount of dry matter for disposal. Thus there is a need to utilize these plant residues to save fertilizers and maintain a satisfactory level of soil fertility. Hence, with the view of in-situ manuring as well as to recycle the agricultural residue, pot experiments were conducted to study the effect of wh...

2013
A. K. Bhat

A global concerns focus on environmental protection and natural resource management. The sustainability of natural resources has taken central stage amongst researchers, the public and policy makers as a key issue in global change and biodiversity preservation. Need has risen to develop an understanding of microbial diversity responsible for variable reaction in different soil orders. There is ...

2016
Marjorie Bonareri Oruru Ezekiel Mugendi Njeru

Smallholder farming systems form unique ecosystems that can protect beneficial soil biota and form an important source of useful genetic resources. They are characterized by high level of agricultural diversity mainly focused on meeting farmers' needs. Unfortunately, these systems often experience poor crop production mainly associated with poor planning and resource scarcity. Soil fertility is...

Journal: :آب و خاک 0
امیر لکزیان اکرم حلاج نیا حدیثه رحمانی

abstract soil drying and rewetting (drw) cycles are considered as environmental stress that would affect the physical, chemical and biological properties of soil and nutrient cycles. the study of soil drying and rewetting effects on plant nutrition and soil fertility is very important and crucial specially their environmental effects. in this study, the effects of 1, 2, 3, 4 and 5 drying and re...

2002
D. Pokrajac

In this paper, we propose several techniques for data reduction and spatialtemporal prediction in precision agriculture databases. The proposed methods are based on various statistical and machine learning techniques including sensitivity based analysis, spatial-temporal autoregression, multiple time series and response modeling with spatially-correlated residuals. The considered techniques are...

2003
A. Moulin D. Derksen D. McLaren

A field study was conducted on hummocky terrain at the Manitoba Zero Tillage Association Research Farm near Brandon, Manitoba, Canada to determine the variability of crop yield as related to landscape position, soil properties, weed populations and plant disease. This information was used to develop a method for delineation of management units related to precision farming. Variable-rate fertili...

2012
Hang Chen Guifen Chen

China is a populous agricultural country, the arable land is the most basic resources which is needed for agricultural production, the quality of arable land has a direct impact on the entire agricultural production and development ,so to carry out the Evaluation of Farmland is a very important foundation work which is advantage to know china’s arable land resources and to improve the efficienc...

2015
Ashish Dwivedi Vineet Kumar Rajveer Singh Yadav Mohit Yadav Dileep Gupta S. S. Tomar

The Indian population is growing rapidly (1.25 billion) and it has to fulfill its food and nutrition requirement. A collaborative strategy should be adopted for increasing productivity by intensifying available land use system. Intercropping is advanced management practices of soil fertility status, consisting of cultivating two or more crops in the same space at the same time, which have been ...

2018
Xiaofei Tian Chengliang Li Min Zhang Yongshan Wan Zhihua Xie Baocheng Chen Wenqing Li

Biochar application as a soil amendment has been proposed as a strategy to improve soil fertility and increase crop yields. However, the effects of successive biochar applications on cotton yields and nutrient distribution in soil are not well documented. A three-year field study was conducted to investigate the effects of successive biochar applications at different rates on cotton yield and o...

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