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Measured (mean of replicates) and predicted sugarcane yield for five nitrogen response experiments (listed in Table 1). Nitrogen fertilizer application rates ranged between 0 and 240 kg N ha-1. Definitions of statistics presented in the figure are: i, intercept; s, slope; rsqr, r2; RSME, root mean square error; d, index of agreement (Willmott, 1982); ME, model efficiency (Nash and Sutcliffe, 1970).
