نتایج جستجو برای: soil clods

تعداد نتایج: 180776  

2013
Chengchen Pan Halin Zhao Xueyong Zhao Huibang Han Yan Wang Jin Li

Grassland salinization causes considerable changes to soil and vegetation, which can lead to changes in soil organic carbon (C) and total nitrogen (N). These changes have complex causal relationships. A significant correlation between soil organic C and total N and any soil or vegetation property does not necessarily imply a significant direct effect of the property on soil organic C and total ...

Journal: :Environmental science and pollution research international 2011
Lingqing Wang Tao Liang Zhongyi Chong Chaosheng Zhang

INTRODUCTION Through leaching experiments and simulated rainfall experiments, characteristics of vertical leaching of exogenous rare earth elements (REEs) and phosphorus (P) and their losses with surface runoff during simulated rainfall in different types of soils (terra nera soil, cinnamon soil, red soil, loess soil, and purple soil) were investigated. RESULTS AND ANALYSES Results of the lea...

2014
YEVHENIYA VOLCHKO Y. Volchko

Soil contamination is a worldwide problem. Soil remediation is often carried out to reduce the risks posed by contaminants in the soil to human health and environment. Contaminant concentration is typically the only soil quality aspect maintained in remediation projects. However, emerging regulatory requirements on soil protection has introduced the soil function concept and demand that other c...

2009
Jonathan G. Martin Paul V. Bolstad Soung-Ryoul Ryu Jiquan Chen

The variability in the net ecosystem exchange of carbon (NEE) is a major source of uncertainty in quantifying global carbon budget and atmospheric CO2. Soil respiration, which is a large component of NEE, could be strongly influential to NEE variability. Vegetation type, landscape position, and site history can influence soil properties and therefore drive themicrobial and root production of so...

2013
Jang Ho Park Jinkyo F. Choo Jeong-Rae Cho

Even if numerous studies were dedicated to propose soil-structure interaction analysis methods, most of these methods introduce several assumptions to circumvent the difficulties encountered in modeling and reduce computational efforts. The complex spatial configuration of the soil-foundation interface or the distribution of the soil medium are often simplified using flat-layered soil profiles ...

2014
Keith R. Daly Sacha J. Mooney Malcolm J. Bennett Neil M. J. Crout Saoirse R. Tracy

Short title for page headings: Influence of the rhizosphere on soil hydraulic properties 16 17 Short statement: Using non-destructive imaging techniques and numerical modelling we 18 quantify differences in hydraulic and structural properties of bulk and rhizosphere soil for 19 sand and clay loam soils. 20 21 22 2 1. Abstract 23 Understanding the dynamics of water distribution in soil is crucia...

2005
P. Pengthamkeerati P. P. Motavalli R. J. Kremer S. H. Anderson

The effects of soil compaction on soil physical properties may alter soil microbial activities and processes, including carbon (C) cycling, and possibly affect agricultural production and environmental degradation. This study investigated the effects of surface soil compaction on soil C mineralization in a claypan soil amended with poultry litter (i.e. turkey excrement mixed with pine shavings ...

2009
Tony Pattison

Introduction Before we can understand the role of amendments and additives to the soil and their part in a healthy soil, we need to understand what is in the soil and role of some of the organisms in the soil. By knowing something about soil biology we can get a greater appreciation of the constraints and challenges presented by the use of amendments and additives to the soil. This article is n...

2005
J. Lipiec V. V. Medvedev M. Birkas E. Dumitru

response to soil compaction associated with soil and crop type, and soil wetness at the time of load application and weather in Central and Eastern Europe are reviewed. The effects of soil compaction on the morphological and anatomical modifications of the roots were shown. The influence of soil compaction on plasticity in root growth and functioning in relation to structural discontinuity is d...

2017
Shengyao Jia Hongyang Li Yanjie Wang Renyuan Tong Qing Li

Soil is an important environment for crop growth. Quick and accurately access to soil nutrient content information is a prerequisite for scientific fertilization. In this work, hyperspectral imaging (HSI) technology was applied for the classification of soil types and the measurement of soil total nitrogen (TN) content. A total of 183 soil samples collected from Shangyu City (People's Republic ...

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