Articles

THE EFFECT OF INTENSIVE ORGANO-MINERAL FERTILIZERS ON THE YIELD OF TOMATOES GROWN IN PLASTIC GREENHOUSES, AND ON BIOLOGICAL SOIL ACTIVITY

Article number
462_104
Pages
687 – 692
Language
Abstract
During the period 1988 – 1991 an experiment was conducted with tomatoes grown in plastic greenhouses at the Agricultural University Experimental Field in Plovdiv.
The goal was to establish the effect of nitrogen fertilizer application at rates of 0, 200, 400, 600 and 800 kg N/ha against a background of P200K200 and different levels of manuring – 0, 50, 100, 150 and 200 t/ha, on the yield of tomatoes and on the biological activity of soil (the development of the main groups of soil microorganisms, the release of CO2 in the soil air, the ammonifying -, nitrifying -, cellulose – decomposing – and catalase activities of soil).

Publication
Authors
N. Alexiev, V. Rankov
Keywords
Soil, fertilization, tomatoes, soil biological activities, soil micro-organisms
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