Agronomy Journal -- Lippke et al. 98 (5): 1333 Figure IG5

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Fig. 5. Treatment means for P uptake, Year 2. Model equation: kg ha^–1 = 2.809 + (N_A x 0.05415) + (P_A x 0.4300) + (N_A x P_A x 6.046 x 10^–4) – (N_A x N_A x 8.661 x 10^–5) – (P_A x P_A x 5.315 x 10^–3), (n = 21, R² = 0.97, s = 2.05).