Effects of heavy liming to spring cereals
1986
Lyngstad, I. (Norges Landbrukshoegskole, Aas (Norway). Inst. for Jordkultur)
Effect of burnt lime up to 20 t CaO/ha combined with two rates of N and K on spring cereal yields were studied in seven field experiments on cly soils during the years 1969-79. Initial soil pH values varied from 4.9 to 6.5. The cereal crops were mainly barley. On the whole, yield response to liming was correlated with initial soil pH. Liming usually increased grain yields in experiments with pH 5.9. A negative lime X N interaction indicated that liming led to increased N-mineralization in soils. Heavy liming sometimes resulted in Mn deficiency in oats
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