Knowledge about the variability of soil physical properties is fundamental for the monitoring of soil quality for being directly related to the sustainability of agricultural production. This study aimed to: a) assess and identify structures of spatial dependence by the construction of semi-variograms, for a Red-Yellow Latosol (Oxisol) under coffee, b) characterize the spatial distributions of the physical properties using ordinary kriging, and c) identify the layer with greatest physical impediment. The experiment was conducted on an experimental farm of […]

It is well-known nowadays that soil variability can influence crop yields. Therefore, to determine specific areas of soil management, we studied the Pearson and spatial correlations of rice grain yield with organic matter content and pH of an Oxisol (Typic Acrustox) under no- tillage, in the 2009/10 growing season, in Selvíria, State of Mato Grosso do Sul, in the Brazilian Cerrado (longitude 51º24′ 21” W, latitude 20º20′ 56” S). The upland rice cultivar IAC 202 was used as test plant. […]

The mapping of rainfall erosivity and rainfall is a practical and indispensable tool to plan the soil and water management on a regional scale, such as countries, states or basins. The purpose of this study was to analyze the spatial continuity of erosive potential of rainfall and rainfall, considering monthly and annual mean values, and to map them for the State of Espírito Santo, Brazil, providing basic information for the planning of sustainable soil use and management. To this end, […]

The soil CO2 emission has high spatial variability because it depends strongly on soil properties. The purpose of this study was to (i) characterize the spatial variability of soil respiration and related properties, (ii) evaluate the accuracy of results of the ordinary kriging method and sequential Gaussian simulation, and (iii) evaluate the uncertainty in predicting the spatial variability of soil CO2 emission and other properties using sequential Gaussian simulations. The study was conducted in a sugarcane area, using a regular […]

Studies on the spatial variation of soil properties associated with the response of crop yields may contribute to a rational application of inputs, enabling economic and environmental gains. The purpose of this work was to evaluate the variability and spatial correlations among soil Fe, Cu, Zn, Mn, and organic matter contents and yield of black pepper grown on a Yellow-Red Latosol. The study was carried out on a black pepper plantation under microsprinkler irrigation, in São Mateus, State of Espirito […]

The Technologies setting at Agricultural production system have the main characteristics the vertical productivity, reduced costs, soil physical, chemical and biological improvement to promote production sustainable growth. Thus, the study aimed to determine the variability and the linear and special correlations between the plant and soil attributes in order to select and indicate good representation of soil physical quality for forage productivity. In the growing season of 2006, on the Fazenda Bonança in Pereira Barreto (SP), the productivity of autumn […]

Soil resistance to penetration is frequently used as an indicator of soil compaction in management systems and can be directly related to crop growth and yields in general. It is important to use geostatistical methods in the assessment of soil resistance to penetration by considering the data heterogeneity of the area. The purpose of this study was to evaluate the spatial variability of soil penetration resistance (PR) in a Vertisol with mango trees. Data collection was performed in the Project […]

Soil properties play an important role in spatial variability of crop yield. However, a low spatial correlation has generally been observed between maps of crop yield and of soil properties. The objectives of the present investigation were to assess the spatial pattern variability of soil properties and of corn yield at the same sampling intensity, and evaluate its cause-and-effect relationships. The experimental site was structured in a grid of 100 referenced points, spaced at 10 m intervals along four parallel […]

One of the factors affecting the distribution of native vegetation is soil formation. Therefore, soils under native vegetation can be highly informative with regard to a region and the original soil fertility, as records of conditions found before agricultural reclamation (agrosilvopasture). The purpose of this study was to assess soil fertility and texture under native vegetation fragments sampled during the Forest Survey of the State of Minas Gerais, Brazil. In general, the variability in all soil properties was high, except […]

The modeling and estimation of the parameters that define the spatial dependence structure of a regionalized variable by geostatistical methods are fundamental, since these parameters, underlying the kriging of unsampled points, allow the construction of thematic maps. One or more atypical observations in the sample data can affect the estimation of these parameters. Thus, the assessment of the combined influence of these observations by the analysis of Local Influence is essential. The purpose of this paper was to propose local […]