The study of the organic matter content in the soil has always played an important part in agricultural science. At present, the practical matters revolving around this issue have become of a global nature. The seriousness of the problem resides in a tendency towards the diminishing of the organic matter content in processed arable soils. The purpose of the research is to pursue the distribution in processed genetic horizons of the organic carbon content in order to create a tree plantation on a gely-stagnic phaeozem in the locality of Uila –Batoş. Soil analyses were conducted according to the certified RENAR methodology of the SOIL-PLANT ANALYSIS LABORATORY within the department of Agrochemistry of the UNIVERSITY OF AGRICULTURAL SCIENCES AND VETERINARY MEDICINE CLUJ-NAPOCA. This method relies on the oxidation principle of the soil carbon into carbon dioxide through the warming up of the soil to 900 0 C in an oxygen gas flow devoid of carbon dioxide. This procedure is based on the dry combustion process. When the soil is heated to a temperature of 900 0 C, the total carbonate quantity present is entirely decomposed. In order to determine the organic carbon content, the carbonates present are discarded. The organic carbon and humus supply reveals average representations of this organic soil component (the determined humus values fall within 2-4% limits), while de real domain of humus content variation is 2.1 to3.1%. In order to maintain the humus content that preponderantly falls within the average representation domain (2-4%), periodical organic fertilization is recommended with organic resources (semi-fermented stable manure or/and poultry manure). The introduction of the organic material in any form in the soil leads to an available energetic input in othe forms and thus increases the heterogeneity and decreases the entropy. Furthermore, a long-term support of humification and the humus content occurs, as well as the increase of soil quality, fertility and productivity. Organic fertilization that incorporates humiferos resources in the soil plays an important part in increasing qualitative and quantitative productivity per surface unit. No other mineral fertlizer, either simple or composed, can make up for the specific and complex effects of organic fertilizers on soils and crops. Stable manure incorporated in the soil, as a complete organic fertilizer that contains all nutritive elements, makes a contribution at improving the structural state, increasing caloric capacity, accessible water resources and exerts a beneficial action on the activity of soil macro and microorganisms, stimulating their activity and development.

carbon, humus, dry combustion

Presentation: oral