In Brazil several digital soil class mapping studies were carried out from 2006 onwards to maximize the use of existing maps and information provide estimates for wider areas. However, there is no consensus on which methods have produced superior results in predictive value maps. This study conducts a systematic review aims analyze factors can improve accuracy Data 334 grouped analyzed by Stude...

Malone and Searle (2021) described a new approach to convert field measured soil texture categories into quantitative estimates of the proportion clay, silt sand fractions. Converted data can seamlessly integrate with laboratory digital mapping workflow. Here, we describe updating Australian national coverages content. The approach, based on machine learning, predicts each fraction at 90 m grid...

Soil texture (% sand, silt and clay sized particles) is one of the most important soil characteristics affecting function soils. To better understand behaviour soils, reliable spatial estimates need to be available. Digital mapping has been an enabler in delivering this sort information. Delivered as two connected pieces, we present new efforts update maps for Australia (Version 1 was delivered...

Examples from the Murray–Darling basin in Australia are used to illustrate different methods of disaggregation of reconnaissance-scale maps. One approach for disaggregation revolves around the de-convolution of the soil–landscape paradigm elaborated during a soil survey. The descriptions of soil map units and block diagrams in a soil survey report detail soil–landscape relationships or soil top...

In Brazil, soil surveys in more detailed scale are still scarce and necessary to more adequately support the decision makers for planning soil and environment activities in small areas. Hence, this review addresses some digital soil mapping techniques that enable faster production of soil surveys, beyond fitting continuous spatial distribution of soil properties into discrete soil categories, i...

abstract: converting point data to continuous one is the first step in order to use them in scorpan flowchart. for this purpose, different geostatistic methods are available which at present research regression kriging with local variogram was applied. for mapping apparent electrical conductivity at the area covering 72000ha located in ardakan region, 700 readings in horizontal and vertical mod...

Soil is one of the most important natural resources covering a large area of the land surface. Soil plays a vital role in biosphere processes, such as energy balance, hydrology, biochemistry, and biological productivity. It supports plants that supply foods, fibers, drugs, and some other human needs. Conversely, desert regions include about one third of earth lands and these regions have increa...

Terrain characteristics, such as slope gradient, slope aspect, profile curvature, contour curvature computed from digital elevation model (DEM), are among the key inputs to digital soil surveys based on geographic information systems (GIS). These terrain attributes are computed over a neighborhood (spatial extent). The objective of this research was to investigate the combi ed effect of DEM res...