[1]
C. M. Borkert, G. J. Sfredo, J. R. B. Farias, C. de Castro, C. L. Spoladori, and F. Tutida, “Residual effect of potassium fertilization applied to soybean in three different Oxisols”, PAB, vol. 32, no. 12, pp. 1227–1234, Dec. 1997.