Effect of different sources and rates of nitrogen and phosphorus fertilizer on the yield and quality of cabbage (Brassica oleracea var. capitata)
1988
Humadi, F.M. | Abdul-Hadi, H.A. (Baghdad Univ., Baghdad (Iraq). Coll. of Agriculture)
Treatments consisted of the combination between nitrogen from two sources (Ammonium sulphate and Urea) of rate of 0, 80, 160, and 240 kg N/h and calcium superphosphate fertilizer of rate of 0 and 120 kg P2O5/h were used. Total yield, marketable yield, and average weight of head and plant were significantly increased as nitrogen levels increased regardless of source and by using phosphate fertilizer compare to 80 kg N/h level or to the control. High level of nitrogen (240 kg/h) with 120 kg P2O5/h caused an increase in caroten and protein contents in cabbage heads
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