Effects of crop rotation and fertilization on physical and chemical properties of chernozem soil. [Master thesis]
2005
Seremesic, S.
The objective of this thesis was to assess the effects of crop rotation and fertilization on some physical and chemical soil properties in the long-term field trial Plodoredi at the Rimski Sancevi (Serbia) experimental station. The unfertilized plot was established in 1946/47, while the fertilized one was set up in 1969/70. The following reprications were included: unfertilized two-year rotation with maize and wheat, unfertilized tree-year rotation with maize, soybean and wheat, fertilized two-year rotation with maize and wheat, fertilized tree-year rotation with maize,soybean and wheat and monoculture of wheat and maize. From the start of the trial till 1986, manure was applied regularly on fertilized plots, as were phosphorus and potassium. Since 1986, because of a high content of phosphorus and potassium in fertilized plots, manure and mineral fertilizers have not been applied. Nitragen is used every year on fertilized plots at 120 kg/ha for maize and 100 kg/ha for wheat, while in soybean Nitragin was used. During two year (2002-2003) there were investigated the following soil properties: Soil volume mass, total porosity, water infiltration, soil specific resistance, soil structure, humus content, total nitrogen content, the C/N ratio in soil, pH value, calcium carbonate content, and available phosphorus and available potassium content.
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