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- Title
Representatividade da amostra de solo de acordo com o volume coletado em lavoura de café Arábica.
- Authors
Guarçoni, André; Soares de Souza, Gustavo; de Sá Paye, Henrique
- Abstract
For the determination of soil fertility, a characteristic of the commonly overlooked samples is their volume, which is related to the number of samples collected to form a representative composite sample. The objective of this work was to establish the influence of the volume of the simple samples in the estimation of the variability of chemical characteristics of the soil and to estimate the deviations around the average tolerated in the collection of 20 simple samples with different equipments in a clay Red-Yellow Latosol cultivated with arabica coffee. Five groups of 30 simple soil samples were collected, with the respective volumes: 80, 320, 720, 1,280 and 2,000 cm³, in the 0-20 cm layer, totaling 150 simple samples. In these samples pH, P, K, Ca2+, Mg2+ and Al3+ were determined. Models were selected that explained the variation of the contents as a function of the volume of the soil samples. Mean deviations around the mean were also calculated using three equipments: soil, probe and hoe. The increase in the volume of soil collected reduced the variability of the characteristics and consequently the number of simple samples needed to form a composite sample. The hoeing was the most efficient collection equipment, since it would provide greater representativeness of the formed composite sample.
- Publication
Colloquium Agrariae, 2019, Vol 15, Issue 3, p69
- ISSN
1809-8215
- Publication type
Article
- DOI
10.5747/ca.2019.v15.n3.a300