نتایج جستجو برای: except of soil organic carbon

تعداد نتایج: 21239174  

Journal: :journal of agricultural science and technology 0
l. b. silvestro laboratory of functional biology and biotechnology (biolab-inbiotec-conicet-cic), national university of the center of the province of buenos aires, argentina. f. biganzoli department of quantitative methods and information systems, faculty of agronomy, university of buenos aires, argentina. h. forjn barrow-inta experimental station, tres arroyos, province of buenos aires, argentina. a. albanesi chair in microbiology and ecology, agricultural faya national university of santiago del estero, argentina. a. m. arambarri spegazzini institute, fcnym, national university of la plata, argentina. l. manso barrow-inta experimental station, tres arroyos, province of buenos aires, argentina. m. v. moreno

zero tillage practices have a direct effect on soil microbial communities modifying soil productivity and sustainability. the crop sequences used can change the aforementioned properties, too. in this study, we evaluated the effect of crop sequences under zero tillage management on soil biological and chemical properties including vertical distribution of soil organic carbon, soil basal respira...

2011
Liping Qiu Xingchang Zhang Linhai Li Jianlun Gao

The response of soil properties to vegetation types is still not well understood and the relationship between vegetation types and soil properties has not been quantified in highland grasslands. A field experiment was conducted in highland grassland of the Loess Plateau in China to study the distribution of soil properties under different vegetation. 22 plant communities totaling 17 species tha...

Journal: :Chemosphere 2006
Alex T Chow Fengmao Guo Suduan Gao Richard S Breuer

Soil organic matter is an important source of allochthonous dissolved organic matter inputs to the Sacramento-San Joaquin Delta waterways, which is a drinking water source for 22 million people in California, USA. Knowledge of trihalomethane (THM) formation potential of soil-derived organic carbon is important for developing effective strategies for organic carbon removal in drinking water trea...

Journal: :بوم شناسی کشاورزی 0
علی بهشتی آل آقا فائز رئیسی احمد گلچین

land use change of forest ecosystems in northern iran changes the soil quality of paresar (gilan province) and gorgan (gorgan province) regions. in order to study changes in some biological soil quality indices due to land use change from forest to cultivated lands, composite soil samples from two depths (0-20 and 20-40 cm) were taken from paresar and gorgan regions and urease, alkaline and aci...

2010
Shuhua Yi A. David McGuire Eric Kasischke Jennifer Harden Kristen Manies Michelle Mack Merritt Turetsky

[1] Ecosystem models have not comprehensively considered how interactions among fire disturbance, soil environmental conditions, and biogeochemical processes affect ecosystem dynamics in boreal forest ecosystems. In this study, we implemented a dynamic organic soil structure in the Terrestrial Ecosystem Model (DOS‐TEM) to investigate the effects of fire on soil temperature, moisture, and ecosys...

Abstract Today, the role of soil and water conservation in increase the vegetation and decrease the soil degradation due to its effect in stabilizing soil has a special place. Vegetation can act as a buffer between the land surface and raindrops or prevent the direct impact of raindrops on the soil surface to prevent the phenomenon of disintegration of soil particles and eroding disperses. The ...

Journal: :health scope 0
ahmad gholamalizadeh ahangar department of soil sciences, faculty of soil and water, university of zabol, zabol, ir iran asma shabani department of soil sciences, faculty of soil and water, university of zabol, zabol, ir iran; department of soil sciences, faculty of soil and water, university of zabol, zabol, ir iran. tel: +98-5422240748, fax: +98-5422232501

conclusions results showed that ann is a powerful tool for predicting sorption coefficients using soil organic carbon content variations. results the multilayer perceptron (mlp) artificial neural networks (ann) model with 1-6-1 layout, predicted nearly 98% of the variance of kd as well as 94% of the koc variations with soil organic carbon content. materials and methods data of this study were d...

2003
Haibin Wu Zhengtang Guo Changhui Peng

[1] Surface soils hold the largest terrestrial organic carbon pool, although estimates of the world’s soil organic carbon storage remain controversial, largely due to spatial data gaps or insufficient data density. In this study, spatial distribution and storage of soil organic carbon in China are estimated using the published data from 34,411 soil profiles investigated during China’s second na...

Journal: :Biomedical and environmental sciences : BES 2006
G Tripathi B M Sharma

OBJECTIVE To study the impacts of abundance of woodlice, termites, and mites on some functional aspects of soil in order to elucidate the specific role of soil fauna in improving soil fertility in desert. METHODS Fauna-rich sites were selected as experimental sites and adjacent areas were taken as control. Soil samples were collected from both sites. Soil respiration was measured at both site...

ژورنال: علوم آب و خاک 2002
حسن رحیمی, , ابراهیم پذیرا, , فواد تاجیک, ,

The general characteristics of salt-affected soils and soil structure degradation process are partially known, but the effects of saline and sodic conditions on mechanical properties of soils are not well recognized. In this study, the effects of electrical conductivity (EC) and sodium adsorption ratio (SAR) on tensile strength of soils with different organic carbon contents were assessed under...

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