Red clover (Trifolium pratense L.) is one of the most important forage legumes in areas with acidic and nutrient poorer soils where alfalfa fails to growth. In 2010-2011 years period we studied four advanced lines and four commercial varieties of red clover, which are widely used in the production in Bosnia and Herzegovina. Our results showed that the variation in grain yield, thousand kernel weight and germination energy was under control of growth. Across genotypes seed yield in 2010 and 2011 was 205 and 223 kg ha -1 , respectively. The highest yield of seed was obtained from second growth in the second year. Extreme precipitation during anthesis and grain filling and ripening in 2010 negatively affected red clover seed production. Advanced line DS-2 had the highest grain yield (234 kg ha -1 ) and thousand kernel weight (1.75 g). Low seeds yields of the tested genotypes are questioning the cost-effectiveness of red clover seed production at this site.

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Abstract. Natural meadows and pastures are spread over 50% of agricultural land in Bosnia and Herzegovina and represent the most important resource in the forage production of hilly and mountain areas. The quality of roughage in the ration is very important for the efficient production of meat and milk in cattle and sheep production. Hay is a feed, that has the most variable chemical composition and nutritional value due to the influence of weather conditions, agricultural practices, harvest time and other factors. In this study, the impact of agro-technical measures, harrowing, fertilizing and harvest time on the forage yields, botanical composition and nutritional value of natural grassland, type Agroseietum vulgaris, in Sljivno in Manjaca mountain, were analized. Applied agricultural practices influenced the increase in the proportion of grasses and legumes, which contributed to the improvement of the feed quality. The highest average yield of hay was achieved by applying basic fertilization, two nitrogen applications and harrowing (3.48 t ha -1 ). All applied agro-technical measures had a positive effect compared to the control group, and the highest yield was 44% better than the control group.

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Examination of heritability of yield and yield components of autochthonous populations of Jerusalem artichoke was conducted in the experimental field of the Agricultural Institute in Banja Luka during 2015 and 2016. The trials were set up in four replications with ten populations of Jerusalem artichoke in the late October 2014. During the study, the following parameters were observed: plant height, number of stems per plant/clone, stem thickness and dry matter yield per plant/clone. Population Razboj had the highest yield of dry matter per plant/clone. In the first year, the population of Irić bašta had the largest number of stems per plant/clone. Broad sense heritability for plant height and number of stems per plant/clone indicates intermediate hereditary traits. A significant positive genetic correlation between yield of dry matter and plant height was determined.