Effect of nitrogen fertilizers applied by different methods on plants and soil. 1. Nitrogen utilization by buckwheat with placement of nitrogen fertilizers
Semenov, V.M.; Kudeyarov, V.N.; Sokolov, O.A.
Agrokhimiya 9: 9-18
In plot trials, ammonium sulphate incorporated into the soil surface at a depth of 30 cm or applied in bands at the same depth was more effective than when applied at other depths in increasing buckwheat yield. Ammonium sulphate applied in bands 10 or 20 cm deep was more effective than when incorporated into the soil surface at the same depth. Its effectiveness was lowest when mixed in the top 10-cm soil layer.