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Eight plant bed fertilizer treatments (N–P–K) were evaluated for the effect on plant production and sweetpotato yield. The treatments ranged from 0–0–0 to 450–450–450 lb/ac. `Beauregard' roots were bedded. After the first plant cutting, 50 lb/ac 34–0–0 was applied to half of the beds. For the second cutting, the 0N–0P–0K treatment without additional N produced plants with less green weight compared to the other treatments; there were no differences between the other 15 treatments. For the first plant cutting, 150–150–150 and 150–300–450 lb/ac produced plants with less green weight compared to 0–0–0, 75–150–300, 300–450–600, and 450–450–450 lb/ac. There were no differences in sweetpotato yield due to plant bed fertilization.

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