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Articles by J.O. Olaniyi
Total Records ( 3 ) for J.O. Olaniyi
  J.O. Olaniyi
  The production and use of amaranth as leaf vegetable and grain production and consumption, calls for more efforts in selecting varieties with high chemical composition and nutritive values. Four varieties of grain amaranth were evaluated for growth, yield, chemical composition and nutritive values in southern guinea savanna of southwestern Nigeria in 2003 and 2004. The varieties tested were NH84/451, NH84/452, NH84/494 and NH84/493-1. These were assigned randomly into three blocks and fitted into a randomized complete block design. Growth, yield and quality data were collected and subjected to analysis of variance and significant means compared using Duncan Multiple range test. Results revealed that the plant height and number of leaves of grain amaranth varieties increased as the plant aged. There were significant (p< 0.05) differences among the varieties from one sampling occasion to another in the 2 years. The highest growth, shoot and grain yields parameters were recorded from NH84/493-1 closely followed by NH84/451 while NH84/452 gave the lowest values in both cropping season. In the two growing seasons, there were significant (p< 0.05) different between the fresh and dry matter yields of different plant parts among the varieties with the stem recorded the highest values. The chemical compositions and the nutritional values in the leaves, stems and roots varied significantly among grain amaranth varieties with the leaves recorded the highest values. The distribution of protein, fat, carbohydrate, fibre and minerals in the plant parts of the grain amaranth were similar irrespective of the varieties. Although, all the four grain amaranth varieties are good sources of quality and mineral elements, the consistent better performance in term of higher yield and nutritive values in both planting seasons of NH84/493-1 variety confirmed its ability to thrive well in the southern guinea savanna zone of Nigeria and its related ecological zones.
  J.O. Olaniyi and J.A. Fagbayide
  `Egusi` melon is an important seed vegetable crop in Nigeria. There is scanty information on its cultural practice requirements for optimum seed yield. Field studies were conducted during the early and late seasons of 2002 on an affisol to determine the appropriate source and time for N fertilizer application and to identify the appropriate index leaf for N diagnosis. One `egusi` melon cultivar, Black edged seed `bara` and two N sources [urea and Calcium Ammonium Nitrate (CAN)] at 0 and 60kg.N ha-1 were investigated. The N fertilizers were applied at five different growth stages as split or single dose. The 25 factorial treatment combinations were arranged in a randomized complete block design and replicated thrice. `Egusi` melon growth parameters, seed yield and nutrient contents in different leaf positions were assessed. Data obtained were analyzed using ANOVA. Split application of N fertilizer significantly (p 0.05) improved `egusi` melon growth and seed yield compared to single dose. Split application of N as half dose at planting and remaining half at vine initiation gave highest melon seed yield. Urea as a source of N fertilizer was found to show an outstanding performance in both seasons, irrespective of the time of N application compare to CAN. The 5th and 6th leaf positions recorded the highest nutrients concentration. Based on the high nutrient contents of the 5th and 6th leaves, they could serve as an indicator of yield and therefore, be used as index leaf.
  W.B. Akanbi , O.A. Olaniran , J.O. Olaniyi , M.A. Ojo and O.O. Sanusi
  Recent survey of indigenous vegetables in south western Nigeria revealed farmers` interest in their cultivation if not for lack of adequate technical knowledge. The efforts to develop appropriate production package prompted us to assess the effects of Cassava Peel Compost (CPC) in combination with or without mineral fertilizer on the growth, shoot yield and nutritional values of Celosia argentea. The treatments applied were: T1 = 375 kg ha 1 NPK; T2 = 2 t ha 1 CPC; T3 = 3 t ha 1 CPC; T4 = 1 t ha 1 CPC + 187.5 kg ha 1 NPK; T5 = 2 t ha 1 CPC + 187.5 kg ha 1 NPK; and T6 = 0 (non-fertilized plant). The treatments were laid out in a randomized complete block design with 4 replicates. Growth and nutritional quality assessments were done on stem height and girth, number of leaves, leaf area, dry matter and shoot yields, shoot proximate and elemental contents. Data collected were subjected to analysis of variance and significant means separated using Duncan Multiple Range Test. The highest growth parameters were recorded with application of 375 kg ha 1 NPK and this was not significantly different from what was observed with T3 and T5. In the case of crop nutritional contents, combined application of 2 t ha 1 CPC + 187.5 kg ha 1 NPK produced plants that were better than other treatments. It could be concluded that the use of cassava peel compost is adequate for celosia production.
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