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Browsing Articles by Subject "Alfisol, humic acid, organic carbon, nitrogen, soil management"

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    ASSESSMENT OF SOIL CARBON AND TOTAL NITROGEN UNDER SHORT TERM AGRICULTURAL MANAGEMENT PRACTICES IN AN ALFISOL OF GUINEA SAVANNAH
    (Department of Agronomy, Nasarawa State University Keffi, 2022-06-12) Amana, Sani Mathew; Jayeoba, O.J.; Ogbe, V.B.; Ahamefule, Henry Emeka; Agber, P.I.
    Field experiments were conducted in the two consecutive rainy seasons of the year 2015 and 2016 at the Agronomy Research Farm, North core of the University of Agriculture Makurdi, in the Southern Guinea Savannah Zone of Nigeria. The soils are generally coarse textured and are well drained to moderately well drained. The experiment consisted of five management practices, which served as the treatments: Bare plot, Soybean, Maize, Mucuna and Grass Fallow. The experiment was laid out in randomized complete block design and replicated four times. The treatments generally increased total organic carbon content (27.02 and 27.78g/kg), particulate organic carbon (POC) (14.39 and 18.63g/kg), soil organic matter (44.83 and 47.76g/kg), and carbon stock (2663 and 2191kg/ha) compared with the bare fallow (20.13 and 13.32g/kg). There were highly significant differences at both depth and years except for POC at the second depth (18.63g/kg) in the first year. Total nitrogen was not significant in the first year but was significant in the second year at 0-10cm soil layer. The particulate organic nitrogen (PON) was significantly affected by the management practices in the first year at both soil depths while in the second year PON was significantly different at soil both depths. The carbon to nitrogen ratio was significantly different in both years and depth except at the depth 10-20cm of the first year. Humic acid was not significantly different among the treatments in both depths and years. The management practices possibly influenced the changes observed in both carbon and nitrogen in the short term. Thus, Mucuna and Grass Fallow may be recommended as best practices in this area.