Browsing by Author "Afe, A. I."

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    EFFECTS OF COW DUNG MANURE AND SINGLE SUPERPHOSPHATE ON SOIL PHOSPHORUS AVAILABILITY, GROWTH AND YIELD OF MAIZE IN A GLEYSOL OF KABBA, NIGERIA
    (Faculty of Agriculture, University of Uyo, Akwabom State, Nigeria, 2016-09-25) Ogundare1, S. K.; Afe, A. I.; Kadiri, W. O. J.; Etukudo, O. O.
    Field experiments were conducted to determine the effect of cow dung amended with single superphosphate on phosphorus availability, growth and yield of maize in a Gleysol. The treatments consisted of sole application of cow dung 10 t ha-1 and reduced levels of cow dung (2, 4 and 6 t ha-1) combined with varying levels of single superphosphate (30, 20 and 10 kg ha-1) fertilizer. Significant treatment effects were observed in plant height and leaf area whereas stem girth was not significantly affected. Leaf phosphorus (P) concentrations were significantly affected by the amendments and the percentage changes ranged from 0.17 - 0.48 and 0.23 - 0.43 in 2011 and 2012 respectively. The P content of maize leaf significantly improved under combined application of cow dung and SSP compared with sole cow dung application and control. The complementary use of cow dung at 4 t per ha + 20 kg per ha SSP produced the highest seed yields of maize (3.21 and 2.56 t per ha) in 2011 and 2012 respectively. It is therefore recommended that the use of cow dung (4 t per ha) combined with 20kg SSP per ha be adopted for maize cultivation in the study area
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    GROWTH AND YIELD OF SORGHUM AS INFLUENCED BY POPULATION DENSITY AND TIME OF INTRODUCTION OF COMPONENT OKRA
    (2025-02) Afe, A. I.; Alagbe, Y.L; Awoniyi, O.A
    A field trial was carried out at the Teaching and Research Farm of Kwara State University, Malete, and the National Centre for Agricultural Mechanization (NCAM) to investigate the growth, yield, and intercropping advantage as influenced by population density and time of introduction in sorghum/okra intercropping. Four population densities of okra (100 %, 75 %, 50 %, and 25 %) were intercropped with the full population of sorghum at the same time (ST), two weeks before (2WBP) and two weeks after (2WAP). Sole sorghum and okra were included in the treatments as a check. The treatments were arranged as 3 x 6 factorial combinations in a randomized complete block in a split-plot and replicated thrice. Plant height, leaf area, grain, and fruit yield of sorghum and okra were influenced by population density and time of introduction. Regardless of population ratios, the yield of sorghum increased as the population density of component okra decreased and with delayed in the time of introduction. The lowest grain yields 1,534.58 kg/ha and 1,327.83 kg/ha respectively for Malete and NCAM were obtained where the full population ratio of both crops was intercropped. Intercropping advantage as measured by land equivalent ratio (LER) and land equivalent coefficient (LEC) indices demonstrated intercropping advantage at all population ratios and time of introduction. All population ratios and time of introduction tested demonstrated economic advantage as observed in positive monetary advantage index (MAI) values. Simultaneous planting and planting sorghum two weeks before okra at a full population of both crops is recommended for adoption in sorghum/okra intercropping.