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Evaluation of direct and residual effects of nitrogen fertilizer application in two-crop sequences of crop rotations

Fotyma, E.; Fotyma, M.; Mackowiak, H.

Pamietnik Puawski 100: 37-59

1992


Accession: 002374923

The direct and residual effects of 6 N rates were assessed in field trials in 4 districts of Poland in 1986-89 using root crop/spring cereal/fodder crop/winter cereal + stubble crop rotations. To obtain direct effects of N free from residual effects of N applied in the previous year, N was applied to only half the plots each year.

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