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The study presents the effect of cutting height (10, 15 and 30 cm) on yield, nutritional value and chemical composition of silage corn. The experiment was carried out under dryland conditions and the silage corn was harvested with three types of self-propelled silage harvesters. Cutting height increased linearly with increasing operating speed of silage harvesters. For all types of silage harvesters, the cutting height of 30 cm had a statistically significant (p=0.05) effect on losses of yields. The numerical value of the R2 factor (from R2 = 0.8978 to 0.9896) shows a strong dependence in all harvesters for all three cutting heights. The regression coefficients (b) show a significant deviation from the theoretical cutting height at 10 and 15 cm (b = 0.6676 and b = 0.6715), and very significant (b = 2.0249) at the theoretical cutting height of 30 cm. With an increase in cutting height, the nutritional value of silage increased. At a cutting height of 30 cm, during the test period in all types of harvesters, the crude protein (CP) content was significantly (p=0.05) higher than at a cutting height of 10 cm (harvester C = 6.94% at 10 cm, harvester B = 8.15% at 30 cm). The cutting height of 30 cm influenced a significantly (p=0.05) lower crude fiber (CF) content of harvester Claas Jaguar 850 (21.19%), compared to John Deere 6810 (24.33%) at a height of 10 cm. The crude ash content (CAsh) did not vary significantly under the influence of cutting height. Starch content was statistically higher (p=0.05) in all types of silage harvesters during the test at a cutting height of 30 cm (28.2% harvester New Holland FX 28, 33.8% harvester Claas Jaguar 850). The content of calcium (Ca) was significantly higher at a height of 30 cm for harvesters John Deere 6810 and Claas Jaguar 850 in the third year, while no significant difference was found for harvester New Holland FX 28. For phosphorus (P), there was no significant difference depending on the cutting height, but it did exist depending on the year. [ABSTRACT FROM AUTHOR]

The paper presents the results of three - year tests (I, II, III) of finishing alfalfa seed of three different purities. Natural alfalfa seeds were classified into three groups: 1) without the presence of quarantine weeds; 2) with the presence of quarantine weeds of Cuscuta spp. and Rumex spp., but in smaller quantities; 3) in which there were also quarantine weeds in larger quantities. The alfalfa seeds were cleaned on a selector with sieves and on a magnetic separator manufactured by Emceka-Gompper. Depending on the purity of natural alfalfa seed, the finishing process had to take place in one to three passes through a system of machines, which caused different finishing output and losses of finishing processed alfalfa seed (9.2 to 38.0%). After finishing, the highest quality of processed seeds was from the group with the highest quarantine weeds (group 3), which was reflected in the lowest percentage of hard seeds (16%) and the highest percentage of germination (83%) in all years. This is also shown by a highly significant negative correlation between germination and hard seed (r=-430) after three years of seed processing. [ABSTRACT FROM AUTHOR]

Observed through agronomic and economic significance, cereals represent the most important group of field plants, and the protein content in grain is the most important chemical parameter of complex grain quality. The research was conducted in order to determine the influence of the variety and different doses of nitrogen on the grain yield and protein content in triticale grain. The experiment, set up according to a random block system in four replications on eutric cambisol soil in the north of Montenegro, included five varieties of winter triticale (Odyssey, Kg-20, Triumph, Rtanj and Tango). In addition to the control (variant without fertilization), four more fertilization variants were applied. The results of the research showed that the application of fertilizers has a significant influence on the values of the observed traits on the one hand, but also that the grain yield and protein content in the grain is largely conditioned by the genotype. In this regard, the highest average protein content in the grain had the variety Triumph in both tested years. The protein content of all tested varieties was significantly lower in the control variant compared to the fertilized variants. The highest grain yield in the first year had the variety Tango while the highest yielding variety in the second year was variety Rtanj. [ABSTRACT FROM AUTHOR]

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