Effect of different rates of nitrogen fertilizer on growth, fruit quality and yield of Guava under New Halfa conditions
2006
Dawoud, D.H. (Agricultural Research Corporation, Khartoum North (Sudan). Shamabat Research Station) | A/Raouf , F. (Agricultural Research Corporation, Soba (Sudan). Forestry Research Center) | salih, A.A. (Agricultural Research Corporation, Soba (Sudan). Forestry Research Center)
The present study was conducted during 1988-89, 1989-90 and 1990-91 seasons on 12 years old Guava trees grown at New Halfa sugar factory orchard to study the effect of Nitrogen fertilizer rate on the growth, fruit quality, and yield of Guava trees under New Halfa conditions. N-fertilizer in from of urea was applied in to tow equal doses the first applied in October and the second applied in June next year. The results showed that all rates of Nitrogen led to significant increase in [tree height and trunk circumference, fruit weight, fruit size, fruit circumference, total soluble solids and leaf N content] when compared with the control through out the experimental period. The result revealed that, the economic rate of Nitrogen fertilizer for Guava trees under New Halfa condition, is 600 g urea to be applied in two doses per tree per year
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