نتایج جستجو برای: soil fertility

تعداد نتایج: 224095  

Journal: :Anais da Academia Brasileira de Ciencias 2006
William S Fyfe Othon H Leonardos Suzi H Theodoro

The development process which humanity passed through favored a series of conquests, reflected in the better quality of life and longevity, however, it also provoked upsets and severe transformation in the environment and in the human food security. Such process is driving the ecosystems to be homogeneous, and, therefore, the nutrients' supply, via nourishment. To change this panorama, the pres...

Journal: :The New phytologist 2005
Jennifer S Powers Kathleen K Treseder Manuel T Lerdau

* It is commonly hypothesized that stand-level fine root biomass increases as soil fertility decreases both within and among tropical forests, but few data exist to test this prediction across broad geographic scales. This study investigated the relationships among fine roots, arbuscular mycorrhizal (AM) fungi and soil nutrients in four lowland, neotropical rainforests. * Within each forest, sa...

2012
Wenyi Dong Xinyu Zhang Huimin Wang Xiaoqin Dai Xiaomin Sun Weiwen Qiu Fengting Yang

Appropriate fertilizer application is an important management practice to improve soil fertility and quality in the red soil regions of China. In the present study, we examined the effects of five fertilization treatments [these were: no fertilizer (CK), rice straw return (SR), chemical fertilizer (NPK), organic manure (OM) and green manure (GM)] on soil pH, soil organic carbon (SOC), total nit...

2016
Leandro Nascimento Lemos Rosineide Cardoso de Souza Fabiana de Souza Cannavan André Patricio Victor Satler Pylro Rogério Eiji Hanada Tsai Siu Mui

The Anthropogenic Amazon Dark Earth soil is considered one of the world's most fertile soils. These soils differs from conventional Amazon soils because its higher organic content concentration. Here we describe the metagenome sequencing of microbial communities of two sites of Anthropogenic Amazon Dark Earth soils from Amazon Rainforest, Brazil. The raw sequence data are stored under Short Rea...

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...

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...

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