Seed Yield and Nitrogen Efficiency in Oilseed Rape After Ammonium Nitrate or Urea Fertilization.

Although ammonium nitrate-based fertilization exerted here an overall trend for yield gain in oilseed rape, this effect could not be broken down to consistent effects of the given N form on N-related efficiency parameters, since the impact of seasonal variations appeared too strong.

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Taken together, ANOVA indicated a highly significant effect of the genotype on seed yield and NUE in either year, although this could not be broken down to the level of consistent responses of individual cultivars to the fertilized N form.

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