Agronomy Journal -- Lippke et al. 98 (5): 1333 Figure IG8

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Fig. 8. Treatment means for N uptake, Year 1. Model equation: kg ha^–1 = 40.16 + (N_A x 0.5673) + (P_A x 1.314) + (N_A x P_A x 4.332 x 10^–3) – (N_A x N_A x 6.625 x 10^–4) – (P_A x P_A x 2.236 x 10^–2), (n = 20, R² = 0.99, s = 7.70).