Figure 2: NH4-N dynamics in manure of the dry season storage experiment. Error bars represent standard error of the mean values. Continuous lines represent the best-fit regression equations for NH4-N dynamics in manure during the dry season experiment. represents the amount of NH4-N (mg/kg manure DM) in the manure. The solid line (—) represents the Medium quality manure, no urine treatment. The dashed line (- - - -) represents the urine-amended Medium quality manure treatment. The dotted line (. . . .) represents the Low quality manure, no urine treatment. The dot-dash line (-··-··) represents the urine-amended Low quality manure treatment. Medium quality manure, no urine: , . Medium quality manure, with urine: , . Low quality manure, no urine: , . Low quality manure, with urine: , . The rate equations for NH4-N dynamics between the manure sources did not differ at significance level α = 0.05.