highly significantp < 1e −6
3 Results 3.1 Nutrient main effects The overall mean effect of P was found to be highly significant (p < 1e −6 ) with an average yield gain of 251 kg ha −1 at an average rate of 15 kg P ha −1 .
3 Results 3.1 Nutrient main effects The overall mean effect of P was found to be highly significant (p < 1e −6 ) with an average yield gain of 251 kg ha −1 at an average rate of 15 kg P ha −1 .