Results of tests made with placement fertilization on the Kotkaniemi experimental farm

Authors

• Yrjö Pessi Rikkihappo Oy, Helsinki
• Mikko Ylänen Rikkihappo Oy, Helsinki
• Auvo Leskelä Rikkihappo Oy, Helsinki
• Jorma Syvälahti Rikkihappo Oy, Helsinki

DOI: https://doi.org/10.23986/afsci.71770

Abstract

On the basis of the results of the tests made on clay soils and on soils containing clay the following conclusions can be drawn: Among different nutrients the placement of nitrogen proved to be the most important. Placement of nutrients in rows at a depth of about 8—10 cm gave considerable increases in crop yield compared with ordinary broadcasting. In the two tests where fertilizer and seed were sown in the same row, the crop yield was of the same size as in the case where they were sown separately. Ripening was delayed, however. When fertilizer and seed were sown with separate machines and the fertilizer was placed closer than 10 cm to the seed, urea did not prove as good as nitrochalk.