Response of irrigated groundnuts (Arachis hypogaea L.) to urea fertilization in the central rainlands of the Sudan.
The response of 3 varieties of groundnuts, i.e.: Ashford (A), Barberton (B), and Corinte (C), to different doses of urea nitrogen under irrigation was studied for three years. As a result of extensive tissue analysis, the critical needs of Barberton and Corinte for nitrogen were found to be 1500 ppm NO3-N and 3.7% total-N. Variety Ashford, which outyielded both, did not respond to urea nitrogen. A linear correlation coefficient of r = 0.85 for pod and straw yields gave a pod to straw ratio of 0.72. Kernel protein and oil content were not affected by nitrogen. Larger nodule counts and their total-N indicated better yields.
D000383:Agriculture; D010367:Arachis / Q000032:analysis; D007887:Fabaceae / Q000378:metabolism*; D005308:Fertilizers; D009584:Nitrogen / Q000378:metabolism*; D009586:Nitrogen Fixation; D009821:Oils / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D010946:Plants, Medicinal; D013397:Sudan; D014329:Tropical Climate; D014508:Urea / Q000378:metabolism*
D005308:Fertilizers; D009821:Oils; D010940:Plant Proteins; D014508:Urea; D009584:Nitrogen