Formation of water-resistant structural aggregates in Orthic luvisol and their changes due to farming system used
2000
Mucha, V. | Sisak, P. | Mucha, R. (Slovak Agricultural Univ., Nitra (Slovak Repubic))
The aim of the present work was to evaluate the effect of two farming systems (conventional - CS and organic - OS) on the creation of and changes in the content of water-resistant structural aggregates of orthic Luvisol of the Zitava hills. Results from a study on the seasonal formation dynamics of water-resistant soil structures confirmed that it is a complicated process which varies during a year, particularly depending on the humus content and composition as well as on the farming system used. A 0.5-3 mm category of water-resistant aggregates (most valuable from the agronomic point of view) amounted on average to 13.74% in the organic farming system and only to 11.67% in the conventional one (this difference is statistically significant). A similar situation was observed for 0.25-10 mm water-resistant aggregates, with 26.98% in the organic farming system and 24.66% in the conventional system. The results obtained indicate that the structural composition of orthic luvisol is not favorable. The main measures ensuring a more favorable production of water-resistant structural aggregates in orthic luvisol of the above area are as follows: the right structure of plant production, the regular use of higher rates of organic fertilizers, liming, and mellowing of low-soil
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