Parameters estimated for mixed non-linear models (late summer period) describing the effects of the day of year on parameters <i>a</i>, <i>b</i> and <i>c</i> of the curves describing pasture yield (Gaussian model).

Significances are based on likelihood-ratio tests. Interaction between the sand classes (SC I, II and III) and the number of rainy days from the summer growth break corresponding to curve parameter b (PDsg) was included as a fixed effect on parameter a.