In agroforestry systems, fine roots grow at several depths due to the mixture of trees and annual crops. The decomposition contributes soil organic carbon stocks may impact fertility, particularly in poor soils, such as those encountered sub-Sahelian regions. aim our study was measure rate root litter from perennial species according depth location under far a parkland. Soil characteristics wer...

a r t i c l e i n f o Spatially constrained multivariate analysis methods (MULTISPATI-PCA) and classical principal component analysis are applied for the entire country of France to study the main soil characteristics of topsoil and to assess if their multivariate spatial pattern can provide insight on their extent and origin. The results of the MULTSPATI-PCA provided evidence of strong spatial...

According to a UN Environment Programme survey, topsoil is eroding faster than it forms on about one third of the world’s cropland, causing an estimated 85 % of the world s land degradation from human activities. Erosion of soil, mainly by water, is also a problem in the Czech Republic where 54 % of arable land is endangered by water erosion. The topic of this article is to describe contemporar...

Spatio-temporal cancer mortality studies in Spain have revealed patterns for some tumours which display a distribution that is similar across the sexes and persists over time. Such characteristics would be common to tumours that shared risk factors, including the geochemical composition of the soil. The aim of this study was to assess the possible association between heavy metal and metalloid l...

Although numerous hypotheses have been proposed to explain geophagy, the primary driver of this behaviour remains elusive. Supplementation of scarce nutrients is one commonly cited explanation. We examined the element concentration of three licks relative to adjacent topsoils to infer the possible reasons for geophagy at Loskop Dam Nature Reserve. Lick samples had greater concentrations of B, C...

In the 1960s, a conservationist agricultural practice known as “no-tillage system” was adopted. Several benefits such soil erosion reduction and carbon sequestration, among others, could be ascribed to no-till systems. Therefore, it is important evaluate long-term sustainability of this system in different environments. This study has objective organic dynamic (40-year) on rolling landscape Sou...

Corn (Zea mays L.) stover is used as a biofuel feedstock in the U.S. Selection of harvest rates for soils problematic, however, because excessive removal may have consequences on plant available P and K concentrations. Our objective was to quantify impacts topsoil contents southeastern Coastal Plain Ultisols. Five (0, 25, 50, 75 100% by wt) were removed five years from replicated plots. Grain m...

It is shown how, given a fuzzy formulation of the variogram of a soil property, a fuzzy set of grid spacings that will achieve a target kriging variance can be derived. This fuzzy set of grid spacings can then be defuzzified in a more or less conservative way to define a sampling scheme. The method is illustrated in three examples. The first uses a hypothetical fuzzy variogram. The second is a ...

Abstract Aims Temperate alley-cropping agroforestry systems maintain agricultural production while offering several environmental benefits. Central benefits of such as the ‘safety-net’-role trees for leached nutrients are mainly due to processes occurring below soil surface: subsoil. Microorganisms in subsoil may play a key role ‘safety-net’-function they can improve capturing and uptake by tre...

The mechanism of how soil carbon pools change when coniferous forests are converted into conifer-broadleaf mixed is poorly understood. In this study, the impact additional inputs on organic mineralization and microbial communities was evaluated. a microcosm incubation experiment, three types 13C-labeled litter (Pinustabulaeformis (PT), Robiniapseudoacacia (RP), mixture PT RP (1:1, PR)) were add...