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vol. 6, nr. 2 (2005)
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The influence of differentiated soil tillage and mineral fertilization level on water reserves and some physical soil properties in crop rotation
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Karol Bujak, Mariusz Frant
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Department of Soil and Plant Cultivation, University of Agriculture, ul. Akademicka 13, 20-950 Lublin |
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vol. 6 (2005), nr. 2,
pp. 333-342
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abstract:
The effect of limitation of the number of ploughings (from 7 – traditional tillage (A) to 3 – reduced (B) and 1 – reduced (C)) and of two fertilization levels on the water reserves, bulk density and total and capillary porosity of lessive soil developed from loess under crop rotation (potato-spring wheat-pea-winter wheat) was studied in a field experiment in the period of 1998-2002. Ploughing was included under potato in each tillage method. Ploughing were substituted mainly by cultivating or disking of the soil. Soil water reserves significantly decreased as a result of both the reduction of the ploughing number and high fertilization level under all of the crops excluding pea grown on modified tillage objects; there was also no tendency towards lowering the water reserves under pea with the high fertilization level. There was only a slight effect of both of the factors on soil bulk density and porosity. Decrease of the soil density and increase of total porosity were observed under winter wheat only, where shallow or no ploughing was applied, while an essential increase of total and capillary porosity occurred under spring wheat where high level of fertilization was used. That fertilization level caused a significant total porosity increase also under pea.
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keywords:
crop rotation, tillage, fertilization, water reserves, bulk density, soil porosity
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original in:
Polish
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