Nitrogen, Phosphorus, and Potassium Influence Yield and Chemical Composition of Bluejoint Forage
1969
Laughlin, Winston M.
Field studies were conducted in the Matanuska Valley with bluejoint (Calamagrostis canadensis) from 1963-7 with annual applications of three N rates with and without P and K. N application increased dry-matter yields, N and Mg content, and N, P, and K uptake. N response increased each year when P was used. N decreased Ca, Al, B, Ba, and Sr concentrations. P application increased dry-matter yields, stand density, P, Ca, Mg, K, and Mn contents, and N, P, K, Ca, and Mg uptake and decreased the N percentage. K application increased dry-matter yield and K and Cu content only when P was used. K depressed Ca, Mg, Ba, B, Sr, and Zn contents. Native bluejoint responds favorably to N and K fertilization when adequate P is used.
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