2.1. Experimental site
Field experiments were conducted at the Crop Research and
Seed Multiplication Farm, Burdwan University, Burdwan,
West Bengal, India. The latitude is 8750037.3500E and longitude
is 231507.2900N with an average altitude of 30 m above
the mean sea level during the winter seasons of 2011–2012
and 2012–2013 with rapeseed (B. campestris L. cv. B9).