Browsing by Author "Asungre, A. P."

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  • Effect of contrasting sources of organic and inorganic fertilizers on growth and yield maize in dry agro-ecology in Northern Ghana
    Kanton, R. L.; Ahiabor, B. D. K.; Ansoba, E.; Asungre, A. P.; Lamini, S.; Mahama, George Y.; Prasad, P. V. Vara (2013)
    Declining maize yields due to a myriad of factors such as inherently poor soils, continuous cropping of cereal after cereal, high cost and unavailability of chemical fertilizers, continuous crop residue removal and soil erosion and run-off have all had their toll low soil fertility and reduced maize yields in northern Ghana. To address this negative trend a field trial was conducted at the Manga Agricultural Research Station in the Upper East Region of Ghana, which represents a Sudan Savanna agro-ecology in the country. The experiment was established as a complete block design with 4 replications with plot dimension of 4.5 m x 5 m. The experimental treatments comprised available sources of both organic and chemical fertilizers currently being used by peasant farmers in Ghana. The experimental factors studied were nitrogen fertilizer rates: 0 kg N/ha; 40 kg N/ha and 80 kg N/ha; length of tied ridges were: 2 m and 4 m wide and crop residue management practices were: total crop residue removal; 50% crop residue removal; 100% crop residue retention and 50% crop residue retention. The trial was established as a randomized complete block design with 4 replications. The results of this study revealed that the chemical fertilizers with micro nutrients such as S, Zn and Mg produced taller plants with superior stem dimensions and also produced tassels and silk significantly earlier than their counterparts. They also produced the best grain and straw yields, due to higher cob numbers, bolder grain and higher harvest indices. Poultry manure and sheep manure were the best amongst the organic sources evaluated.
  • Effects of nitrogen fertilizer on growth and yield of maize varieties with different maturities in a dry agro-ecology of Northern Ghana
    Larbi, A.; Kanton, R. L.; Buah, S.; Kombiok, J. M.; Ansoba, E.; Asungre, A. P.; Lamini, S.; Prasad, P. V. Vara (2013)
    Declining maize yields due to a myriad of factors such as inherently poor soils, continuous cropping of cereal after cereal, high cost and unavailability of chemical fertilizers have all contributed to the above phenomenon. To address this negative trend a field trial was conducted at the Manga Agricultural Research Station in the Upper East Region of Ghana, which represents a Sudan Savanna agro-ecology in the country. The trial was established as a randomized complete block design with 4 replications. The plot dimensions are 4.5 m x 5 m, and maize was sown on ridges made by bullocks. All cultural practices are as recommended for maize production in Ghana. For the extra-early maize, the, however, there were significant differences among the rates of N applied, with application of N at the rate of 120 kg ha-1 recording the highest grain yield. For the early maturity group there were significant (P (MARR) (150%). This means that these treatments 40N and 80N could be recommended for uptake by farmers or for further research work.