The changes in agrochemical properties of soil cultivated with sugar beet and grain maize
1990
Hudcova, M. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (CSFR))
In 1985-1988 in field trials conducted in beet- and maize-growing regions the content of organic nitrogen in the soil under sugar beet was found to increase when deep tillage was replaced by loosening and the stubble ploughing was dropped. This content under grain maize exhibited no significant changes at the different soil cultivation. When deep tillage was replaced by vertical loosening, available phosphorus content in the soil was higher in both crops than in another soil cultivation practices. Dropping the stubble ploughing and replacing the deep tillage by loosening increased in both crops potassium content in the soil. Significantly higher contents of organic nitrogen, available phosphorus, potassium and magnesium were found under sugar beet in the topsoil horizon of 0 to 0.3 m than in the subsoil horizon of 0.3 to 0.5 m. The same results (higher content of organic nitrogen, available phosphorus and potassium in the soil horizon of 0 to 0.2 m in comparison with the soil horizon of 0.2 to 0.4 m) were obtained in the soil under grain maize while adverse results were obtained in available magnesium. The values of soil reaction were increasing towards the depth in both crops.
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