نتایج جستجو برای: soil quality

تعداد نتایج: 920223  

2013
Liangqian Fan Fenghui Chen Yuliang Fan

The grey clustering method is suitable for the comprehensive assessment of soil environmental quality. However, the zero-weight problem exists in the general grey clustering method. In order to solve the defect and apply the grey clustering method to soil environmental assessment, this study improved the general grey clustering method by replacing the linear whitening functions with the exponen...

2012
Agnieszka Kalwasińska Maria Swiontek-Brzezinska Aleksandra Burkowska

The present study was aimed at determining the relationship between the operation of municipal landfills and the fluctuations of bacterial indicators of the sanitary quality of soil. Soil samples were collected at monthly intervals from May 2010 to April 2011 at ten sampling sites located on the premises and in vicinity of the reclaimed Municipal Landfill Site (MLS) and the new Municipal Solid ...

Journal: :journal of rangeland science 2015
habib yazdanshenas mohammad jafari hossein azarnivand hossein arzani

plant life and food production for human closely depend on fertile and healthy soil. knowledge about qualitative properties of soil and its potential production can contribute us in the plantation, fertilization, utilization and land management. in addition, rangelands cover a very large portion of the earth's surface and play an important role in food security and other ecosystem services. the...

Journal: :Journal of environmental quality 2002
L R Lilburne A E Hewitt G P Sparling N Selvarajah

Soil depletion and degradation have been increasingly recognized as important environmental issues in many parts of the world. Over the last decade a number of political and legislative measures have been introduced to encourage and enforce sustainable soil management in New Zealand. Application of the new legislation has highlighted gaps in our knowledge of soil quality and a lack of scientifi...

Many factors including climate, type of rootstock, soil properties, geological factors, plant nutrition and irrigation affect the quantity and quality of orange fruit. In this study, the relations between citrus orchards conditions, their soil properties and leaf elements concentration and fruit quality were evaluated. The experiment was conducted as a randomized complete block design and soil,...

2013
Masayuki Ushio Takeshi Miki Teri C. Balser

How diversity influences the stability of a community function is a major question in ecology. However, only limited empirical investigations of the diversity-stability relationship in soil microbial communities have been undertaken, despite the fundamental role of microbial communities in driving carbon and nutrient cycling in terrestrial ecosystems. In this study, we conducted a microcosm exp...

2015
Jinjin Cheng Changfeng Ding Xiaogang Li Taolin Zhang Xingxiang Wang

The effects of soil rare earth element (REE) on navel orange quality and safety in rare earth ore areas have gained great attention. This study investigated the transfer characteristics of REE from soil to navel orange pulp (Citrus sinensis Osbeck cv. Newhall) and examined the effects of soil REE on internal fruit quality in Xinfeng County, Jiangxi province, China. Path analysis showed that soi...

2017
Douglas Karlen Cynthia A. Cambardella John L. Kovar Thomas S. Colvin Douglas L. Karlen

Soil quality is influenced by inherent and anthropogenic factors. This study was conducted to provide multiple groups guidance on how to achieve and maintain improved soil quality/health. Our hypothesis was that tillage intensity was the primary anthropogenic factor degrading soil quality, and our objective was to prove that hypothesis through an intensive 2005 sampling of a central Iowa, USA f...

2014
Hou Maomao Shao Xiaohou Zhai Yaming

To identify effective regulatory methods scheduling with the compromise between the soil desalination and the improvement of tomato quality and yield, a 3-year field experiment was conducted to evaluate and compare the effect of straw mulching and soil structure conditioner and water-retaining agent on greenhouse saline soils, tomato quality, and yield. A higher salt removing rate of 80.72% in ...

2001
QI HU SONG FENG GARRY SCHAEFER

In 1991, the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) established its Soil Moisture–Soil Temperature (SM–ST) Pilot Network consisting of 21 stations in 19 states in the contiguous United States. At each station, soil temperatures were measured at up to six different depths from 5.08 to 203.20 cm (or 2–80 in.) below the surface. Before 1997, the observa...

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