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Articles by L.A. Okosun
Total Records ( 1 ) for L.A. Okosun
  L.A. Okosun , M.D. Magaji and A.I. Yakubu
  Two field experiments were conducted during 1998 and 1999 rainy seasons at the Usmanu Danfodiyo University Sokoto Dry Land Farm, Sokoto (Latitude 13° 09`N and Longitude 5° 18`E), with a view to studying nitrogen and phosphorus fertilization on growth, yield components and calyx/seed yields of roselle. Treatments consisted of four levels each of N (0, 20, 40 and 60 kg N ha-1) and P (0, 10, 20 and 30 kg P ha-1), which were combined factorially in a randomized complete block design, replicated three times. Data were collected on plant height, calyx and seed yield of roselle. Results showed that plant height responded significantly to both nitrogen and phosphorus fertilization. Plants treated with 40 and 60 kg N ha-1 were significantly taller than plants that were fertilized at 0 and 20 kg N ha-1, whereas P rates at 10 and 20 kg ha-1 produced the tallest plants than the other P rates. Calyx and seed yields increased with increasing rates of N and P fertilizers up to 60 kg N and 30 kg P ha-1.
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