ABSTRACT.
FIELDCONDITIONS ASSOCIATED WITH K ABSORPTION BY SULTANINA GRAPES

Jorge Valenzuela B.1 y Rafael Ruiz Sch.2
 

In a Sultaniná experimentalvineyard located at La Platina Experiment Station, Santiago, leaf-K was found to be dependantofavailable soil water at the 25-50 cm layer. Dry blocks showed poor infiltration probably due to machinery compactation. Ammonium acetate extractable K in soil of non treaJed plots was similar at different soil levels in aH blocks of the vineyard. In the spring of 1973 foliar K levels were not affected by soilapplicationsof K2SO4. At the following season after a rainywinter, leaf K increase deverywhere especially inplants treated with K2SO4.

Keywords:
1Ing. Agr., Ph. D., Programa Frutles y Viñas, Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA), Casilla 5427, Santiago, Chile.
2Ing. Agr., M. S., Programa Fertilidad de Suelos, Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA), Casilla 5427, Santiago, Chile.