The article reflects the results of research conducted with studies on performance maize hybrids and shows economic efficiency cultivation different depending mineral fertilizer. Mineral fertilisers are most important element in technology growing new Therefore it is very to study effect fertilizers. Therefore, fertilizers grain productivity corn hybrids, which common our region importance. aim...

Social dynamics in group-housed animals can have important impacts on their welfare, feed efficiency, and production potential. Our objectives were to: 1) evaluate the effects of parity social grouping competition behavior, feeding patterns, 2) investigate cow-level relationships between production, efficiency. Fifty-nine Holstein cows (144.5 ± 21.8 starting DIM, mean SD) housed a freestall pen...