Cole crop yield response to reduced nitrogen rates

Response of cabbage (Brassica oleracea L. var. capitata), Brussels sprouts (Brassica oleracea var. gemmifera) and broccoli (Brassica oleracea L. var i talica) to reduced N rates was studied over 4 yr. Treatments were applicati on methods, broadcast, split and banded with two rates of N; 120 and 90 kg ha(-1) plus a control of 150 kg ha(-1) broadcast N. Marketable yield was lo wer by 15, 23, and 13 %, respectively, compared to the control. Banding low ered yield of cabbage and broccoli. The lower N rate had the lowest yield i n all crops. Leaf N concentration varied with N rate.