Effect of sowing time and sowing rate on seed yield of broad leaf lupins lupinus albus in the winter rainfall region
Agenbag, H.J.C.; Van Rooyen, A.
Applied Plant Science 6(1): 15-23
Field trials were conducted under dryland conditions during 1985, 1986 and 1988 at three sites [in South Africa] to study the influence of sowing time and sowing rate on the seed yield of L. albus. Treatments consisted of four sowing rates (120, 140, 160 and 180 kg ha-1) which, translated into plants per unit area, would normally amount to 35, 40, 45 and 50 plants m-2. There were three planting dates, April 17 (week 16), May 8 (week 19) and June 1 (week 22). Buttercup out-yielded Kiev and Hamburg at all three sites with a mean yield of 2 004 kg ha-1 in comparison with the grand mean of 1 937 kg ha-1. Seed yield did not increase significantly by increasing the sowing rate from 120 to 180 kg ha-1. At Langgewens and Tygerhoek seed yield was reduced when planting was delayed till June 7 while the best yield was obtained from the May 15 planting at Elsenburg.