Table 2
Distribution of typical and atypical lactation curves according to season of calving

Atypical lactation curve
Calving season	Negative B	Negative B and C	Total	No. typical curve	X2
Spring	2994	1893	4887(26.91 %)	13,273(73.09 %)	–
Summer	3191	2156	5347(28.05 %)	13,711(71.95 %)	–
Autumn	2160	1354	3514(19.92 %)	14,120(80.08 %)	–
Winter	2366	1430	3796(20.97 %)	14,298(79.03 %)	–
Total	10,711	6833	17,544(23.96)	55,402(76.03)	2.11