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Articles by E.Y. Oyinlola
Total Records ( 3 ) for E.Y. Oyinlola
  E.Y. Oyinlola and S.A. Jinadu
  Sand, loam and clay are three main textural classes of soil. However, they differ in their nutrient and water holding capacities. A greenhouse experiment was conducted to determine the effect of five rates of N fertilizer (0, 30, 60, 90, 120 kg N ha-1) grown in 3 different textural classes (sand, loam and clay) of soil on growth, yield and nutrient composition of tomato. Effects of N on all the parameters determined were significant (p≤0.05) except plant height at 2 and 4 Weeks after Planting (WAP). The highest plant height at harvest (12 WAP), mean fruit weight, fruit yield and dry matter yield were obtained at 90 kg N ha-1. Tissue nutrient (NPK) concentrations increased as the rate of N increased. Loam soil produced the highest value of all the parameters determined except tissue N concentration. Tomato growth and yield were significantly influenced by soil texture and N applications; loam soil at 90 kg N ha-1 proved superior to other treatments, in this study.
  E.Y. Oyinlola
  Boron deficiency is prevalent in soils with low activity clay. This study was carried out to determine the response of three cultivars of sunflower (Helianthus annuus L.)-Record, Isaanka and Funtua to boron fertilizer. Four levels of boron-0, 4, 8 and 12 kg B ha-1 were applied and the experimental design was randomized complete block with 3 replications. Results obtained showed that there were cultivar differences in response to boron fertilizer. Record variety recorded the highest plant height at 8 kg B ha-1 while Funtua have the highest seed yield at 4 kg B ha-1. The highest percentage oil content was recorded by Isaanka variety. Toxicity symptoms and reduction in yield were observed at the highest level B (12 kg B ha-1) in all the varieties. Percentage oil content correlated with capitulum diameter and seed yield. Regression analysis also revealed that the optimum B rate for the three cultivars and four years of trial for the various parameters determined ranged from 5.60-8.40 kg B ha-1.
  A.A. Mustapha , N. Abdu , E.Y. Oyinlola and A.A. Nuhu
  Background and Objectives: Savannah soils are mainly coarse textured and thus mostly porous and dry. Cation exchange capacity varies according to differences in pH, organic matter and soil texture. Due to the possible overestimation of results with the use of NH4OAc (pH 7), there arises the need to compare and explore the results that could be obtained with the use of other methods on Nigerian savannah soils. Materials and Methods: Eighty samples were collected from 4 different Savannah zones, Derived Savannah, Sudan Savannah, Northern Guinea Savannah and Southern Guinea Savannah. The different method of determination used were NH4OAc (pH 7), NH4OAc (at soil pH) and BaCl. The obtained results was subjected to analysis of variance by using JMP software. Means separated by using Fishers protected least significant difference. Results: Results obtained using Bacl2 was generally similar to the range obtained with the use of NH4OAc (7) from soils of the savannah region. The use of NH4OAc (soil pH) gives good result on acidic soils with low content of organic matter. Conclusion: The amount of CEC observed with the use of different methods is influenced by the experimental conditions as well as the physicochemical properties of the soil and the exchange ability of the reagent used.
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