Milk Urea Concentration to the Evaluation of Nitrogen Efficiency Transformation on Dairy Farms
I. Maskaľová, V. Vajda
Effect of Parity and Days in Milk on Milk Urea Concentration and Milk Components in Holstein Dairy Cows
P. Timkovičová Lacková, I. Maskaľová, V. Vajda
Evaluation of Urine Nitrogen Excretion as the Measure of the Environmental Load and the Efficiency of Nitrogen Utilization
I. Maskaľová, V. Vajda, P. Timkovičová Lacková