Content, composition and characteristics of humus in pseudogley under the different ways of using
Grubisic, M.(Institute for Technology and Nuclear and Other Mineral Raw Materials, Belgrade (Serbia and Montenegro))E-mail:[email protected] | Dugalic, G.(Faculty of Agronomy, Cacak (Serbia and Montenegro))
In the paper are showed the results of determination the content, composition and characterization of humus from Kraljevo pseudogley in five profiles which represent three different varieties according the way of using and that is the forest soil, meadow soil, and arable field soil type, and the opening is done on unfertilized, fertilized with NPK and fertilized with NPK+Ca variety. The forest soil type has the biggest content of humus 5.83, after that meadow soil type with 3.00, unfertlized arable field soil type 1.79, fertilized 1.57 and fertilized+Ca 1.52. Obtaining fulvous under the humic acids in the wide interval with the except of the arable field soil type fertilized+Ca is important characteristic of the fraction composition of humus of the examined varieties of pseudogley. According the relation of extinctions E4:E6 the smallest condensation of aromatic nucleuses of the humic acids has forest soil (5.67), better (5.00-5.17) arable field soil type and the best (4.64) meadow variety of pseudogley. The values of the threshold of coagulation, respectively isoelectric point, humic acids (16-20 meq CaCl2 on 1/l of humate) shows the high degree of its dispersion and uniformity characteristics.
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