Some effects of rate of application of nitrogenous fertilizer to wheat grown continuously compared with wheat in a four-course rotation

Abstract

An experiment comparing continuous winter wheat with the two wheat crops in a rotation of beans, oats, wheat, wheat, with four rates of application of N fertilizer, is described and the results discussed.The wheat following wheat in the rotation consistently outyielded the wheat following oats, but the continuous wheat yielded on average less. Response to N fertilizer was not affected by sequence of cropping and since there was practically no response to the highest increment of N, it is clear that additional N could not have brought the yield of the continuous wheat up to the level of the wheat in rotation.

The Influence of Crop Rotation with an Increasing Content of Cereals on Photosynthetic Potential of Winter Wheat

“…Cultivation of wheat in cereal crop rotation or in monoculture leads to a drop of grain yield due to the effect of external environmental growth factors. It has already been proved that the reduction of grain yield of wheat is associated with lower number of stems per unit area, number of grains per ear, reduction in weight per grain, or it may be the result of interaction of all these structures of grain yield (KOBLER 1980, KuRTEN and RANGE 1980, RIDGMAN et al 1985.…”