Abstract
Soil spatial variability mapping allows the delimitation of the number of soil samples investigated to describe agricultural areas; it is crucial in precision agriculture. Electrical soil parameters are promising factors for the delimitation of management zones. One of the soil parameters that affects yield is soil compaction. The objective of this work was to indicate electrical parameters useful for the delimitation of management zones connected with soil compaction. For this purpose, the measurement of apparent soil electrical conductivity and magnetic susceptibility was conducted at two depths: 0.5 and 1 m. Soil compaction was measured for a soil layer at 0–0.5 m. Relationships between electrical soil parameters and soil compaction were modelled with the use of two types of neural networks—multilayer perceptron (MLP) and radial basis function (RBF). Better prediction quality was observed for RBF models. It can be stated that in the mathematical model, the apparent soil electrical conductivity affects soil compaction significantly more than magnetic susceptibility. However, magnetic susceptibility gives additional information about soil properties, and therefore, both electrical parameters should be used simultaneously for the delimitation of management zones.
Highlights
The objectives of this study are: (1) To assess whether field-scale electrical conductivity (ECa) and magnetic susceptibility (MS) geospatial measurements are potential estimators of soil compaction and (2) to indicate the optimum set of electrical soil parameters for the delimitation of management zones connected with soil compaction
Based on the results described above, for magnetic susceptibility, 0.5 and
There is a lack of scientific papers regarding relationships between electrical parameters and soil compaction
Summary
One of the objectives of precision agriculture is optimizing production by increasing yield or by cost reduction due to optimizing the use of natural resources, and improving soil quality [1] Another important aspect is environmental impact reduction, e.g., by the variable-rate application of fertilizers or reduction of the application of plant protection products. Delimitation of management zones allows for a reduction in sample numbers involved in defining soil properties. This process is difficult due to the high soil spatial variability and complex combination of factors that may influence soil properties [3]
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