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SL346: A Summary of N, P, and K Research with Potato in Florida

Figure 8. Plot of number of occurrences for three yield levels versus the N rate from studies summarized in Fig. 7. We chose to group the responses (90 to 94%) and 95 to 99% for easier viewing. There were no instances where 95% to 99% percent relative yields were significantly different from 100% relative yield. The reader will note that numbers of observations for each N rate varied.