Influence of crop management on yield formation in cereals. [German]

Abstract

Grain yield of winter wheat in a given yr varied between 3.19 and 5.85 t/ha and between 3.2 and 4.7 t in 2 sets of data compiled in 1969-79 and 1972-8, respectively. no single factor including soil type, cv., preceding crop or N application was responsible for the yield differences. Variance for yr X location was responsible for 50% of grain yield variation in a series of field trials; cv.-specific crop management was only important at high yield levels. Preventive application of fungicides against major diseases increased the av. grain yield of 16 wheat cv. by 1.38 t. From trials in 1976-80 with winter wheat and spring barley, the number of grains/m2 was the most important criteron differentiating yield between and within the crops. Correlation between grain number and yield decreased as yield increased but 1000-grain wt. compensated for this effect. (Abstract retrieved from CAB Abstracts by CABI’s permission)