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- W2045540624 abstract "Birdsfoot trefoil (Lotus corniculatus L.) is a forage legume grown widely in cool-temperate regions, but its forage and seed yield responses to P and K are not well documented. Field experiments were established on a poorly drained Brimley silt loam (fine-loamy, mixed, frigid Alfic Haplaquods) in the Upper Peninsula of Michigan and on an irrigated Hubbard loamy sand (sandy, mixed Udorthentic Haploborolls) in east central Minnesota to determine response of Norcen and Viking cultivars to P and K. Plots were seeded at 2 and 10 lb/acre for seed and forage production, respectively. Factorial combinations of P and K were applied annually at each site, 0 to 13 lb P/acre with 0 to 280 lb K/acre in Minnesota and 0 to 22 lb P/acre with 0 to 80 lb K/acre in Michigan. Added fertilizer improved stands and forage yield in only a few cases. Applied P improved stands of Norcen on the poorly drained soil, but effects did not carry over in production years. Stand establishment was not affected by applied K. Forage yields on the loamy sand were not improved by applied K when soil test levels in August exceeded 126 lb K/acre. Added fertilizer K could be accounted for in exchangeable soil K in the uppermost 6 in., K removed in harvested forage, and estimated K contained in roots. Soil test levels of K increased rapidly (0.73 lb exchangeable soil K/1.0 lb fertilizer K) when K fertilizer additions exceeded K removal in forage. Forage yield did not improve with added P, although Bray-1 extractable P was as low as 21 lb/acre in the upper 6 in. of soil. No effects of fertilizer were observed for seed yield or winter survival." @default.
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- W2045540624 date "1991-01-01" @default.
- W2045540624 modified "2023-09-23" @default.
- W2045540624 title "Birdsfoot Trefoil Response to Phosphorus and Potassium" @default.
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- W2045540624 doi "https://doi.org/10.2134/jpa1991.0114" @default.
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