Agricultural bank as a financial resource has a crucial role for providing credit to farmer in recent decades as almost 64% of total farm credit of Khorasan Razavi province in 2007 has been paid by agricultural bank. With Regard to importance of financial supporting for investment in this sector, this study was done on 133 farmers of credit used group from totally 177 farmers of study that received loan from agricultural bank by Logit model. Results of estimated Logit model showed that the number of installments has the most importance in investment of received credit by farmers and then farm land and previous investment have more importance. In addition, effect of policy changes on investment indicated that applying three options of number of installment, cultivated land area and previous investment, simultaneously have the most effect on investment probability. According to results, attention to policy variables in investment for increasing productivity and decreasing of poverty in agricultural sector suggested.

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