Birdsfoot trefoil response to phosphorus and potassium

(...) 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 (...)