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1. Influence of Phosphorus and Potassium Fertilization on Alfalfa Yields Under Intensive HarvestIn the northern part of the North Central (NC) states cutting management schedule and adequate fertilizer are important factors in maintaining alfalfa stands. Recent work in Minnesota by Sheaffer indicates that fall cutting poses some risks to lon-term stand persistance but should be considered as a management alternative to allow greater harvest flexibility. He further states that stand loss can be greatly reduced by high levels of fertilizer (particularly potassium). The study I am reporting on... |
2. Influence of Tillage and Placement on the Location of Phosphorus in the Root ZoneIn recent years, the ridge-till planting operation and the use of the chisel plow have developed into the most widely accepted planting systems for conservation tillage in Minnesota. While there is opportunity to incorporate plant nutrients in the chisel plow system, previous studies have shown that this incorporation is shallow when compared to the moldboard plow system. The ridge-till system, on the other hand, offers only limited possibilities for fertilizer incorporation. Typical broadcast applications... |