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Fig. 5. Nitrogen uptake in ryegrass grown after application of poultry manure, mineral fertilizer, and no N. Bars are divided into N uptake in ryegrass harvested in the year of sowing (black) and cumulative N uptake in ryegrass in the three cuts in the second (gray) and third (white) year after initiation of the experiment. Standard errors are shown for the cumulative N uptake (n = 3). Bars denoted with the same letter are not significantly different (P = 0.05).
