ABSTRACT.
Effect of fallowing date on wheat yield, in the Piedmont soils of the Ñuble Province, South-Central Chile

Nicasio Rodríguez S.1, Aquiles Godoy R.1, Pedro del Canto S.1, Jorge Chavarría R.1 y Ciro Belmar N.1
 

In Piedmont soils (Andosols) of the Ñuble Province, an experiment was conducted during three growing seasons, to determine the effect of fallowing date on wheat yield, and also to study the relations of fallowing with soil nitrate, nitrogen fertilization, and weed control. With longer periods between fallowing and sowing dates, wheat yields were enhanced in, two of the seasons, which can be associated to a low rainfall during the summer periods. Fallowing during these dry periods resulted in a good control of “pelillo” (Agrostis alba) and “hierba azul” (Echíum vulgare); this last weed was also effectively controlled by herbicides. Effective weed control enhanced wheat production in alI situations. Available N increased with longer periods between fallowing and seeding dates.

Keywords:
1 Estación Experimental Quilamapu (INIA), Casilla 426, ChiIlán, Chile.