Forma da paisagem como critério para otimização amostral de latossolos sob cultivo de cana-de-açúcar

By R. Montanari, J. M. Junior, G. T. Pereira, Z. D. Souza. 2005

66 citations recorded by the source corpus.

Abstract – The number of sampling points is essential to establish an evaluation program of the spatial variabilityof soil atribute. The objective of this work was to use the form of landscape as auxiliary criterion in the optimizationof the outline sample for the estimate of chemical attributes of oxisol, in a area under sugarcane cultivation. It waspossible to choose a continuous area with two landforms: concave, that occur in higher positions of the area, andlinear, comprising steep, stocking leans and inferior leans. A 50x50 m spacing in a mesh of 300x3.000 m (total area94 ha), with 421 sampling points were used. Soil sample in depths 0.0–0.2 m and 0.6–0.8 m were collected, in eachpoint of the grid, in order to evaluate the soil chemical attributes. In the concave landform, larger space variabilitywas observed for the chemical attributes of the soil. The application of the program Sanos 0.1 in the sampling grid(concave landform and linear landform) allowed to observe that the landform concave in both depths presentslarger space variability of the chemical attributes than the linear landform.Index terms: soil sampling, spatial variability, geostatistics, relationship soil-relief.

Subfields: Environmental Engineering, Plant Science, Soil Science

View Paper: https://www.semanticscholar.org/paper/393acf7ecccbf17ccf128653ea2e4d73d29e9163