Malavolta, E.; Graner, E. A.; Haag, H. P.; Sarruge, J. R.
(Universidade de São Paulo, Escola Superior de Agricultura, 1964)
Leaf samples from coffee plants under three different fertilizations, namely NPK, NP and PK, were collected for chemical analysis. It was found that the contents of N, K, Ca, Mg and S in the first, second, third and fourth ...