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Influence of inorganic and organic nitrogen fertilizers regimes on oil content of sunflower in Morogoro, Tanzania

Research Paper | June 1, 2018

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Josiah M. Kinama, Irika M, Habineza M. Jean Pierre

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Int. J. Agron. Agri. Res.12( 6), 166-174, June 2018


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This study was conducted at the Sokoine University of Agriculture to assess the influence of farmyard manure (FYM) and inorganic nitrogen fertilizers on sunflower seed oil content. The treatments consisted were: control (no nitrogen fertilizer, no farmyard manure); 2 t farmyard manure (FYM)/ha applied at planting (AAP); 5 t FYM/ha (AAP); 10 t FYM/ha (AAP); 20kg N/ha applied as UREA at 30 days after planting (DAP); 40kg N/ha applied as UREA at 30 (DAP); 60kg N/ha applied as UREA at 30 (DAP); 2 t FYM/ha at planting + 20kg N/ha applied as UREA at 30 (DAP); 5 t FYM/ha at planting + 40kg N/ha applied as UREA at 30 (DAP); and 10 t FYM/ha (AAP); + 60kg N/ha applied as UREA at 30 (DAP). A randomized complete block design was used and treatments replicated three times. Sunflower variety Record was used as a test variety. Data collected included: soil sample before planting, plant tissue analysis, seed oil content and total seed oil yield per hectare. All data were subjected to analysis of variance (ANOVA) and means were separated using (LSD) P ≤ 0.05. The results showed that unlike the other parameters, oil content was only increased by 10 t FYM/ha in both seasons. It was therefore recommended that farmers in Morogoro to consider application 10 t FYM/ha in order to have high seed sunflower oil content.


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