Soil structure of calcaric and non-calcaric rendzinas under forest, grassland and arable land
2006
Cupac, S.(Faculty of Agriculture, Belgrade - Zemun (Serbia)) | Djordjevic, A.(Faculty of Agriculture, Belgrade - Zemun (Serbia)) | Jovanovic, Lj.(University of Belgrade, Belgrade (Serbia). Center for Multidisciplinary Studies)
This study aimed to quantify structural properties of rendzina soils in Serbia, and especially to determine the effect of decarbonation and different forms of land use on soil aggregate distribution and stability. An indication of favourable soil aggregate distribution is data showing that the content of aggregates with 1-5 mm particle size, which is desirable from the agronomical viewpoint, is 50.04% on the average, while macroaggregates make 6.28-fold the sum of micro and mega aggregates. High aggregate stability is indicated by the fact that the proportion of water stable aggregates of greater than 1 mm size ranges from 53.78 to 91.38%, i.e. 71.38% on the average. With increasing alkalinity of calcaric rendzina soils, aggregate stability in water significantly decreases. Concerning non-calcaric rendzina soils, the proportion of fine aggregates increases as the process of decarbonation proceeds and their stability decreases. Differences in aggregate distribution and stability between the calcaric and non-calcaric rendzina soils were not found to be statistically significant. Forest and grassland rendzinas showed no significant difference regarding structural properties. Soil tillage has significant effect on the soil structure of arable rendzinas and, compared to forest and grassland rendzinas, they have less favourable structure index and water stable aggregate content.
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