Effects Of Commercial Chemical And Microbiological Products In Soil On Maize Growth And Yields

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ABSTRACT

A study was conducted under screenhouse and field conditions at Sokoine University of Agriculture to evaluate the effects of commercial chemical and microbiological products on growth and yields of SITUKA maize variety grown on an Ultisol soil. The study soil had medium organic matter, low available phosphorous (1.02 mg/kg) and very low extractable zinc (0.34 mg/kg) hence the soil was of medium fertility status and only moderately suitable for maize production. Commercial products evaluated were Teprosyn, P-solubilizers and N2-fixers, in each experiment using the randomized complete block design (RCBD) with three replications. Six treatments, namely: i.control (without commercial product and Pfertilizer), ii.commercial product alone at manufacturer’s recommended rate, iii.commercial product alone at double rate, iv.commercial product + 10 kg P ha-1 P-fertilizer, v.10 kg P ha-1 P-fertilizer and vi.20 kg P ha-1 P-fertilizer, were used. In the screenhouse, Teprosyn, Psolubilizers and N2-fixers did not result in significantly (P

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