The study used t-test and OLS to analyze the effects of improved soybean variety on yields of some selected crops in Borno and Kaduna states. Results showed that households in Tropical Legume II (TL II) communities obtained higher yield from cereals. This is an implication that, soybean has improved soil fertility and increase the yield of cereal crops of the TL II participants. The result revealed that factors influencing yield include age, educational level, sex, farm size, credit, farming experience, information and participation in TL II were all positive and significant (P<0.05). The non-TL II farmers should copy from the TL II participants.
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