Journal of Agronomy1812-53791812-5417orgz10.3923/ja.2007.382.384SantosBielinski M.2200762Studies were conducted in the Dominican Republic during two years on adult ‘Keitt’ mango (Mangifera indica L.) fields to examine the long-term effect of chemical and organic fertilization programs on marketable fruit yield. The treatments were (a) 1.8 kg 15-15-15 (N-P-K)/tree, once a year (b) 1.1 kg 15-15-15/tree, twice a year (c) 1.4 kg 15-15-15/tree, once a year (d) 1.8 kg 15-15-15/tree, once a year, plus 13.6 kg compost/tree (e) 1.1 kg 15-15-15/tree, twice a year, plus 13.6 kg compost/tree and (f) 1.4 kg 15-15-15/tree, once a year, plus 13.6 kg compost/tree. The results indicate that the application of 1.8 kg 15-15-15/tree, once a year, plus 13.6 kg compost/tree and 1.3 kg 15-15-15/tree, twice a year, plus 13.6 kg compost/tree improved marketable fruit number during both harvest years. The addition of compost for two years increased fruit number by averages of 17 and 24% in comparison with the same treatments without compost.]]>Chia, C.L., R.A. Hamilton and D.O. Evans,1988Chong, C.,2005Crane, J.H. and C.W. Campbell,1994Food and Agriculture Organization (FAO),2003Garcia, C. and T. Hernandez,1997Hartz, T.K.,2006Jordahl, J.L. and D.L. Karlen,1993Litvany, M. and M. Ozores-Hampton,2002Mikkelsen, R.L. and T.W. Bruulsema,2005Raviv, M.,2005SAS Institute,2000Wanitprapha, K., K.M. Yokoyama, S.T. Nakamoto and C.L. Chia,1991Xiuchong, Z., L. Guojian, Y. Jianwu, A. Shaoying and Y. Lixian,2001