Effect of seeding date, nitrogen and phosphate fertilizer on growth, yield and quality of rapeseed in northwest Alberta
Christensen, J.V.; Legge, W.G.; DePauw, R.M.; Hennig, A.M.F.; McKenzie, J.S.; Siemens, B.; Thomas, J.B.
Canadian Journal of Plant Science 65(2): 275-284
ISSN/ISBN: 0008-4220 DOI: 10.4141/cjps85-040
The effects of seeding data, and N and P fertilizer on the agronomic characteristics of 2 rapeseed species (Brassica campestris L. and B. napus L.) were studied for a 6 yr period at 2 northwest Alberta locations. Seeding dates were established at weekly intervals from early May to mid-June. Two fertility levels were established; a control treatment in which no fertilizer was applied and a fertilizer treatment in which N and P were applied to meet the requirements of a 1680 kg .cntdot. ha-1 crop. Maximum yields were obtained most frequently with seeding periods of mid- to late May for B. campestris and mid-May for B. napus. Seeding data had little effect on plant density or seed quality. N and P fertilizer reduced plant densities but increased seed yield where nutrient deficiencies occurred.