INFLUENCE OF ORGANIC FERTILIZERS ON SOIL PROPERTIES UNDER SUGAR BEET

In sugar beet farming system we studied the impact of organic fertilizers Condit Eco and Condit Mineral and farmyard manure on physical and chemical properties of soil. The field experiment is situated on research-experimental base of Slovak University of Agriculture in Nitra on soil type Haplic Luvisols. The results obtained in the period 2008-2010 showed the possibility of use of organo-mineral fertilizers Condit Eco and Condit Mineral as an alternative source of organic matter. Their influence on the chemical properties of soil differed in several parameters from that of farmyard manure. In variants with Condit fertilizers, lower humus content and its lower quality was recorded compared with the variant with farmyard manure. In case of Condit also soil pH was lower. With regard to the soil structure the impact of Condit was comparable to that of farmyard manure. The proportion of agronomically most valuable water-resistant aggregates of size 0.5-3 mm was increased after application of both, farmyard manure and Condit. Spring application of Condit Eco was more favourable to the soil; in case of Condit Mineral more favourable was its autumn application Overall the influence of both Condit fertilizers on soil properties was favourable.