Resumo

DENOIA, J et al. Relationship between an index used for quantifying the status of the cultural profile and other physical parameters of the soil. FAVE. Secc. Cienc. agrar. [online]. 2020, vol.19, n.2, pp.37-43. ISSN 1666-7719.

The study of the cultural profile (PC) contributes to monitoring of the state of the soil in an agricultural system. A quantitative assessment was designed: agricultural CP index (CPI). The aim of this work was to study the relationship between IPC and other physical properties related to PC. Eleven plots of agricultural land and two plots without productive use were studied. The variables characterized were CPI, visual qualification of structural quality (Cvc ), resistance to penetration (RP), structural stability (EE), percentage of aggregates between 0.3 and 2 mm (Ag) and organic matter (OM). Multiple linear regression analysis was performed, with y = IPC and regressor variables: MO (x1), Cvc (x2), EE (x3), RP (x4) and Ag (x5). Cvc, RP and Ag presented a significant linear relationship with IPC; not so MO and EE. Applying multiple regression y = IPC and regressor variables: Cvc , RP and Ag, the three variables accounted for almost 75% of the variance of IPC. Cvc is the one that has the greatest influence on IPC. We conclude that Cvc, the RP and Ag were singnificantly related with the IPC.

Palavras-chave : Cultural profile; Agriculture; Physics properties.

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