Survey of soil nutritive deficiencies using pot experiments. XXV. Influence of the NPKCaS purity on samp les from Cautín. Part I

Gotardo Schenkel S.1, Pedro Baherle V.2 y Mauricio Gajardo M.3

This Part I includes only the Introduction and the Literature Review. Part II will include Materials and Methods, Results and Discusion, and Conclusions, obtained from the experimental comparison between two equivalent NPKCaS fertilizations: a. chemical substances of analytical quality; and b. commercial fertilizers. The general conclusion is that the number of soils poor in micronutrients has been underestimated, because of the micronutrients contained as impurities in the commercial fertilizers.

1 Facultad de Ciencias Agropecuarias y Forestales, U. de Concepción, Casilla 637, Chillán, Chile.
2 Estación Experimental La Platina (INIA), Casilla 5427, Santiago, Chile.
3 Estación Experimental Carillanca (INIA), Casilla 58-D, Temuco, Chile.