Variabilidade espacial da fertilidade de solo sob o cultivo de hortaliças no Município de São luís

Abstract

The use of geotechnologies has been emerging in agriculture through the use of precision agriculture. This makes it possible to map and identify the entire chemical profile in planting areas, which ensures better management of inputs, making the use of fertilizers more efficient and generating greater profitability. Agricultural areas are not homogeneous within a property, even if they are small. Thus, the present study aimed to evaluate, through geostatistical tools, the analysis of the chemical attributes of the soil of a rural property through precision agriculture. A total of 15 samples were collected using a spacing of 35 m. The soil was collected at the georeferenced central point, and around it, 4 more samples were collected, at a distance of 5 meters from the georeferenced point. The construction of the maps was based on the principles of geostatistics, which represents the spatialization of information in geographic space from point data, using interpolation techniques. The map was used to identify variability in the distribution of nutrients within the study area, which may be related to the management of the different crops and the techniques used to apply fertilizers. The use of geostatistical tools enabled the creation of maps of the chemical attributes of the soil, demonstrating that it is an effective technology for studying and understanding the spatial variability of soil fertility, emphasizing the importance of rational management in the provision of nutrients for crops