Hp. Dossantos et al., EFFECT OF CROP-ROTATION ON GRAIN YIELD AN D ON THE SEVERITY OF WHEAT ROOT DISEASES, UNDER NO-TILLAGE SYSTEM, Pesquisa agropecuaria brasileira, 30(7), 1995, pp. 923-929
During five years, at the Cooperativa Agraria Mista Entre Rios Ltda.,
in Guarapuava, PR, Brazil, the effects of some crop rotation systems o
n grain yield and on the severity of wheat root diseases were assessed
. Four rotation systems for wheat were studied: 1) monoculture; 2) rot
ation of one winter without wheat: 3) rotation of two winters without
wheat; 4) rotation of three winters without wheat. A randomized comple
te block design with four replications and plots with 60 m(2) was used
. The severity of wheat root diseases in monoculture (33%), under no-t
illage, was higher than the one found in rotation with one (12%), two
(9%), and three winters wheat (11%).