Geostatistics Applied to Physical and Chemical Attributes in an Area with Cassava in the Region of Humaitá, Amazonas
DOI:
https://doi.org/10.21664/2238-8869.2024v13i2.p35-49Keywords:
kriging, spatial variability, sampling densityAbstract
Cassava is a regional culture of great importance because of its adaptability and an excellent source of protein, on the other hand, the management system is critical to the success of cultivation. This study aimed to use a scaled semivariogram to determine the spatial variability and sample planning of physical and chemical attributes in a Cambisol cultivated with cassava in the region of Humaita, Amazonas. The experiment was conducted in a Cambisol cultivated with cassava, establishing a grid of 70 x 70 m. We collected 64 samples of soil disturbed and undisturbed with a regular spacing of 10 m in depth, 0.0-0.20 m to determine chemical attributes and physical. The data were subjected to analysis descriptive statistics and geostatistics. It was concluded that the physical attributes have higher spatial variability concerning chemical attributes of the soil showing a range of 30 and 42 meters, respectively, in the adjustment of the scaled semivariogram. Based on the scaled semivariogram, to characterize the spatial variability of physical attributes and chemicals in Cambissol cultivated with cassava, the sampling density is 11 and 6 points ha-1 respectively. The use of a scaled semivariogram is efficient in determining the sampling densitybecause the present values range close to the average values of attributes analyzed individually.
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Copyright (c) 2024 Ivanildo Amorim de Oliveira, Robson Vinício dos Santos, Douglas Marcelo Pinheiro da Silva, Romária Gomes de Almeida, Ludmila de Freitas, José Maurício da Cunha, Flávio Pereira de Oliveira, Emanuel da Costa Cavalcante, Milton César Costa Campos
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