Spatial variability of soil fertility in areas cultivated with grains in the region of Paragominas, Pará, state, Brazil

Saldanha, E.C.M. Silva Júnior, M.L. da Okumura, R.S. Bonfim Neto, A.L. do Viégas, I. de J.M. Fernandes, A.R.

Spatial variability of soil fertility in areas cultivated with grains in the region of Paragominas, Pará, state, Brazil


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