Evaluation of some physical and chemical parameter of a soil under an onion crop. Caracterización de un suelo cultivado de cebolla

Valora este artículo
(0 votos)

Ramírez, H and Rodríguez O. 1997. Evaluation of some physical and chemical parameter of a soil under an onion crop. Acta Horticulturae 433: 537-542. 

Some physical and chemical parameters from an onion cropped field were evaluated ten days previous harvesting. Onion yield was also measured. Hydraulic conductivity, bulk density and soil porosity were measured in undisturbed soil samples in laboratory. Infiltration rate was measured in serpentine furrow in the field. Additional samples were collected to evaluate pH, EC, percent of dispersed clay, Ca, Mg, Na, K, TCC (total cationic concentration) and soil flocculation value with phosphogypsum. Several soil samples were taken at each, top, ridge and bottom of the furrows. Several physical constraints showed by the soil (low HC and IR, crust formation, level of Na and Mg) pointed to characterize it as a "hardsetting soil" or soil which structure collapses on wetting. At December 1992, date of harvesting, relative low yields were recorded. Salinity levels, low IR and HC, fine texture, formation of a surface seal leading to anaerobic conditions of the soil in addition to physiological and sanitary constraints seems to be determinant factors of the low yield.