Crop rotation effect on some physical properties of leached smolniza (vertisol)
1997
Mitova, T. | Dimitrov, I. ("N. Poushkarov" Institute of Soil Science and Agroecology, Sofia (Bulgaria))
Changes of some physical parameters were studied in a long-term field experiment at the Kostinbrod research station, Sofia district. This paper discusses the results obtained in the period 1987-1991. Soil moisture content, bulk density and strength were determined in monoculture of maize and two 2-years crop rotation: wheat-maize and peas (for grain) - maize, at two leves of fertilization. Soil moisture content at maize sowing in spring depends more on the precipitation during winterspring period than on the manner of maize rotation. The determined bulk density ranges between 0,9-1,2 g cm3 that is optimum for the growing crops and does not affect their developement. The results of this study indicate that soil physical properties vary with specific practices and the environment rather than with the crop rotation system.
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