نتایج جستجو برای: soil feature

تعداد نتایج: 412858  

Journal: :Environmental Modelling and Software 2006
Gianni Fila Marcello Donatelli Gianni Bellocchi

Pedotransfer functions (PTFs) are physical–mathematical models which allow estimating soil hydraulic properties from soil data. In the absence of direct measurements, they represent a valuable tool for providing agro-ecological models with soil input estimations, whose accuracy is currently a key issue, especially in fieldand regional-scale modelling which rely on soil information databases. Th...

2013
Wenju Liang Yong Jiang Ying Qin Yuge Zhang

Using the methods of soil analysis and geostatistics combined with GIS, this paper determined and mapped the spatial distribution of soil DTPA-extractable copper (Cu) in cultivated fields of Shenyang suburbs of China, aimed to assess the roles of industries and agricultural managements in affecting the spatial heterogeneity of soil Cu in this region. The results showed that the soil DTPA-extrac...

2016
Saeid Hamzeh Marzieh Mokarram Azadeh Haratian Harm Bartholomeus Arend Ligtenberg Arnold K. Bregt

Land suitability classification is important in planning and managing sustainable land use. Most approaches to land suitability analysis combine a large number of land and soil parameters, and are time-consuming and costly. In this study, a potentially useful technique (combined feature selection and fuzzy-AHP method) to increase the efficiency of land suitability analysis was presented. To thi...

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 ...

Journal: :journal of ai and data mining 2015
m. imani h. ghassemian

hyperspectral sensors provide a large number of spectral bands. this massive and complex data structure of hyperspectral images presents a challenge to traditional data processing techniques. therefore, reducing the dimensionality of hyperspectral images without losing important information is a very important issue for the remote sensing community. we propose to use overlap-based feature weigh...

2014
Joël Amossé Roxane Kohler-Milleret Jean-Michel Gobat Renée-Claire Le Bayon

chlorotica Aporrectodea rosea X-ray tomography Burrow networks Microcosms Earthworms are considered as key actors of soil processes at different spatial and temporal scales and provide essential ecosystem services linked to climate regulation or primary production. However, little is known about their basic functional roles (e.g. organic matter decomposition, soil structuring processes) in pert...

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One of the most important main environmental problems is soil erosion and its affects. Eutrophication, low oxygen levels and `high nutrient (nitrogen and phosphorus) concentrations in reservoirs, channel and other water courses, is a common water pollution feature. Phosphorus (P) is one of the major plant nutrients and also the major nutrients controlling eutrophication of surface water. The ai...

Journal: :Computers & Geosciences 2012
Amir Pourabdollah Didier G. Leibovici Daniel M. Simms Piet Tempel Stephen H. Hallett Mike Jackson

Soil and landform information is needed for a wide range of applications but available data are often inaccessible, incomplete, or out of date. Within the European FP7 project ‘e-SOTER’, following recognised harmonisation principles, we developed an XML schema to serve as an exchange format for soil and terrain data derived from e-SOTER methodologies (SoTerML). It encompasses existing SOTER dat...

2002

We report concentrations of cosmogenic l°Be ( t l / 2 = 1.5 x 10 6 y r s ) in soil excavated from a soil-mantled hillslope in Black Diamond Mines Regional Park, Contra Costa County, California. The most striking features of the data are: (1) the similarity in the downward decreasing trends of 1°Be concentrations in two soil profiles collected 75 m apart, (2) the coincidence in each soil profile...

2016
K. Morris F. G. Horgan C. T. Griffin

Meloidogyne minor, first reported on potatoes in the Netherlands in 2004, is an emerging nematode pest in Europe. It damages turfgrass, particularly creeping bentgrass (Agrostis stolonifera) grown on sandy soils such as those of golf greens. However, little is known of the nematode’s life history and pathology. In this study, the spatial and temporal distribution of M. minor on a creeping bentg...

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