Browsing by Author "Kareem, Isiaka"
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Item Fertilizer treatment effects on yield and quality parameters of sweet potato (Ipomoea batatas).(Research Journal of Chemical and Environmental Science., 2013) Kareem, IsiakaCurrently the world is moving towards organic production of crops for the discovered and envisaged advantages. Despite this, farmers are faced with the challenges of the bulkiness of organic fertilizer to be used and further gains that could be accrued from it even if sacrifice of using it is made. To be quite sure of the appropriate fertilizer type to be used in improving quality as well as the tuber yield of sweet potato, this work, therefore, evaluated the effectiveness of organic, inorganic and organo-mineral fertilizers on quality determinants of sweet potato as well as its tuber yield. This experiment was carried out at the Teaching and Research Farm, University of Ibadan. The treatments applied were Pacesetter organic fertilizer at the rate of 3t/ha, inorganic fertilizer (NPK 15:15:15) at the rate 130kg/ha while organomineral fertilizer (comprising NPK 15:15:15 and Pacesetter organic fertilizer) was at the rate of 1.5t/ha and the control .The experiment was laid out in randomized complete block design (RCBD) with tree replications and the fertilizer treatments were applied at four weeks after planting. At maturity, destructive sampling was embarked upon and the sampled plants were partitioned into leaves and tubers. The fresh and dry weights of the samples were taken after which their proximate analyses were done to determine the levels of the quality determinants (moisture content, crude protein, crude fat, crude fibre, Vitamin A and ash content) in them. Final harvesting was done at the end of the experiment to determine the yield per treatments. The data collected were analysed using analysis of variance (ANOVA) with the aid GENSTAT 5 package and significant means were separated using Least Significant Difference (LSD) at 5% probability level. The results indicated that all the above mentioned quality determinants of sweet potato leaves and tubers were not significantly increased by the fertilizer treatments used except for ether extract in the tubers which was significantly improved by organic fertilizer. Also, leaf and tuber dry matter production were not significantly increased by the applied treatments. However, inorganic as well as organic fertilizers significantly increased the final fresh tuber yield of the crop. It was also found that leaves of sweet potato had higher levels of quality indicators than the tubers except for energy content which was higher in the tubers. It is, therefore, recommended that organic fertilizer and, to a lesser extent, inorganic fertilizer (NPK 15: 15:15) be relied upon to increase tuber yield of the crop. Finally, sweet potato should be produced with organic fertilizer since it is more advantageous and the inorganic fertilizer did not produce much higher than it did.Item INFLUENCE OF SEED PRIMING ON YIELD, MORPHOLOGICAL AND PHYSIOLOGICAL CHARACTERISTICS OF WATER-DEFICIT STRESSED LOWLAND RICE(Annals of West University of Timişoara, ser. Biology,, 2021) Kareem, Isiaka; Ismail, M.R.; Puteh, A.B.; Kareem, S.A.; Lawal, O.I.; Adekola, O.F.; Abdulkareem, K.A.; Olayinka, B.U.; Abdulaziz, Ayinla; Ahmed, Oladimeji; Baba, H.S.; Kuranga, H.A.; Lawal, Q.O.; Musa, A.I.; Yusuf, Sa'adat Yetunde; Lawal, Mujidat Temidayo; Oyelade, Y.O.One of the potential ways of increasing rice production to cater for ever increasing population of Malaysia is to extend the production area of lowland rice through its production as upland rice. Therefore, this research was conducted to determine the effects of seed priming in alleviating water deficit stress in lowland rice produced as upland rice. The treatments used were 100mM calcium chloride dihydrate for duration of 48hours and temperature of 25oC, 40% w/v polyethylene glycol (PEG) 6000 for a duration of 48hours and temperature of 25oC, 100ppm kinetin for a duration of 24hours and temperature of 4oC, 200ppm methyl jasmonate for a duration of 24hours and temperature of 4oC, stressed control (unprimed seeds) and the unstressed control (unprimed seeds with adequate irrigation). The experiment was laid out in randomized complete block design (RCBD) with three replications. Data were collected on classical growth parameters, germination pattern, gas exchange characteristics, yield and yield components. It was found that priming MR219 rice with PEG could enable the variety to be produced as upland rice with little yield reduction because PEG priming was the best in individual seed mass, final yield, harvest index and water use efficiency. It is, therefore, concluded that 48hours of priming with 40%w/v polyethylene glycol at 25oC be used for MR219 rice seeds whenever MR219 rice variety is to be cultivated as upland rice.Item Stressful Effect of Different Rates of Nitrogen Starter Dose on Nodulation, Growth, Proximate Composition and Yield of Soybean (Glycine max)(NIPES Journal of Science and Technology Research, 2022) Kareem, Isiaka; Lawal, Q.O; Olayinka, B.U; Abdulkareem, K.A.; Lawal, Mujidat Temidayo; Yusuf, Sa'adat YetundeDespite the fact that high nitrogen content in the soil can impede nodule formation in soybean, the need for addition of nitrogen fertilizer as a starter dose to supplement the actions of N-fixing bacteria is a necessity because it restores the drained nutrient and results in high yield. To evaluate the stressful effects of different rates of N fertilizer starter dose, a pot experiment was conducted to evaluate the effect of N fertilizer starter dose on nodulation, growth, proximate composition and yield of soybean. Urea was applied at the rates 0, 50, 75 and 100 kgN/ha at planting using side placement method. The experiment was laid out in Randomized Completely Block Design (RCBD) with three replications. Growth assessment was through taking data on plant height, number of branches, number of leaves and internode length. Also, data on nodulation, yield and yield attributes were taken. Proximate compositions (crude protein, crude fat, crude fiber and ash content) were also determined. It was found that 100 kgN/ha of N-fertilizer improved the total nodulation by 33.95% compared with the control. The yield was greatest with application of 100 kgN/ha compared with other application rates because there was 20% yield increase compared with the control. For the proximate composition, crude protein content was 7% above the control with application of 50 kgN/ha. Furthermore, crude fat content was 37% better than the control with the application of 100 kgN/ha. It was concluded that for profitable soybean production in the study area, the use N fertilizer like urea at 50 kgN/ha as a starter dose is recommended because of its cheapness and high yield that resulted from its application to the crop. Finally, nitrogen starter dose up to 100kgN/ha did not constitute stress to production of soybean variety under test.