Effect of long-term fertilisation on grain yield, yield components and quality parameters of winter wheat

The long-term effect of N and P fertilisation on the grain yield, yield components and quality parameters of winter wheat was studied for different sites in the National-Long-term Fertilisation Trials in Hungary.This network of small-plot fertilisation experiments has been maintained since 1967 in nine different agro-ecological regions of the country.Increasing P and N doses had a considerable effect on the grain yield, yield components and quality parameters of winter wheat according to the results evaluated in the first 20-year average of the experiments.However, these effects differed depending on the agro-ecological conditions of the sites.Yield increases could be detected at lower fertiliser doses, and improvement in quality parameters at higher rates.