Fig. 3. Growth rate of perennial ryegrass treated with daily N as a function of photosynthetic photon flux density (PPFD). Values are means of three replicates. Slope values followed by the same letter are not significantly different at P = 0.05.
Fig. 3. Growth rate of perennial ryegrass treated with daily N as a function of photosynthetic photon flux density (PPFD). Values are means of three replicates. Slope values followed by the same letter are not significantly different at P = 0.05.