نتایج جستجو برای: soil erosion0074

تعداد نتایج: 180737  

2015
Michal Allman Michal Ferenčík Martin Jankovský Miroslav Stanovský Valéria Messingerová

Machine traffic and timber skidding significantly affect the soil surface and soil properties. The effects are mostly negative and result in soil erosion, worsening of soil properties and inhibition of the growth of roots and soil organisms. In this study, we evaluated forest soil damage caused by the HSM 805 HD wheeled skidder during timber skidding in selected forest stands in the School Fore...

2017
Miaohua Quan Juan Liang

Based on the characteristics of Lycoris aurea (L. aurea) natural distribution and local soil types, we selected four representative types of soil, including humus soil, sandy soil, garden soil and yellow-brown soil, for conducting the cultivation experiments to investigate key soil factors influencing its growth and development and to select the soil types suitable for cultivating it. We found ...

Journal: :آب و خاک 0
دیانی دیانی رئیسی رئیسی

abstract cadmium is one of the heavy metals with a considerable importance for its potential toxic effects on soil microbial activities and composition. although, the toxic effect of cadmium on soil microbial activities is somewhat well-known, but the extent to which cd affects soil biota depends largely on soil properties and conditions, particularly soil organic matter contents. thus, the aim...

2009
M. J. Escorihuela A. Chanzy

a r t i c l e i n f o The aim of this study is to analyze the influence of the soil moisture sampling depth in the parameterization of soil emission in microwave radiometry at L-band. The analysis is based on brightness temperature, soil moisture and temperature measurements acquired over a bare soil during the SMOSREX experiment. A more detailed profile of surface soil moisture was obtained wi...

2012
Inakwu O.A. Odeh Johan Leenaars Alfred Hartemink Ishaku Amapu

It is well known that the world is rich with soil data resulting from the efforts of past soil surveys. However, the majority of these data is largely unused. These legacy soil data come in the form of soil maps, soil survey reports, soil profile descriptions, and/or in the format of antiquated “card catalogue”. These data provide many benefits including soil information preservation or as a ma...

2004
Luis C. Timm Julio C. M. de Oliveira Tania T. Tominaga Fabio A. M. Cássaro Klaus Reichardt Osny O. S. Bacchi

The quantification of soil water balance components was conducted in a sugarcane (Saccharum officinarum L.) field differently managed, as well as a qualitative analysis of the methodologies used for their estimation. The study was conducted in randomized block experiment with four replicates and three treatments: bare soil, mulched soil using trash left on the soil surface after harvest, and so...

2012
Kari Ylivainio Tommi Peltovuori

We studied the effects of soil temperature (8 °C and 15 °C) on barley growth, barley phosphorus (P) uptake and soil P solubility. Barley was grown in a pot experiment in two soils with different P fertilization histories for 22 years. The availability of P was estimated by using 33P-labeled fertilizer and calculating L-values. After cultivation for 22 years at ambient soil temperature without P...

2003

Soil quality is an evolving concept intended to aid farmers, land managers, researchers, public decisionmakers, and others in the management of soil resources. The central question of soil quality assessment is “how does a soil function?” and a variety of physical, chemical, and biological indicators can be used to address it. This question, however, is complicated by the interdependencies betw...

2014
Tomislav Hengl Jorge Mendes de Jesus Robert A. MacMillan Niels H. Batjes Gerard B. M. Heuvelink Eloi Ribeiro Alessandro Samuel-Rosa Bas Kempen Johan G. B. Leenaars Markus G. Walsh Maria Ruiperez Gonzalez

BACKGROUND Soils are widely recognized as a non-renewable natural resource and as biophysical carbon sinks. As such, there is a growing requirement for global soil information. Although several global soil information systems already exist, these tend to suffer from inconsistencies and limited spatial detail. METHODOLOGY/PRINCIPAL FINDINGS We present SoilGrids1km--a global 3D soil information...

Journal: :Environmental geochemistry and health 2018
Mark A S Laidlaw Callum Gordon Andrew S Ball

Urban soils in many cities have been found to be contaminated with lead from past usage of leaded petrol, deteriorating lead-based exterior paints and industrial sources. Currently, the spatial distribution of soil lead concentrations in the Melbourne metropolitan area is unknown. The objective of this study was to perform a preliminary assessment of the spatial distributions of the surface soi...

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