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A field experiment was conducted during the two summer seasons of 2009 and 2010 in sandy soil on potato �Sante� to study the effect of using 100% compost (15 t/fed.) and 50% compost + nitrogen fixing bacteria (Azotobacter, and Pseudomonas alone or together) on potato growth and yield as compared to the conventional mineral fertilization (120-75-150 kg/fed. NPK + 5 t compost/fed). No significant differences in tubers yield per plant and per hectare were detected between mineral fertilization (T1) and using 100% compost (T2); however, �T1� significantly produced a high yield per hectare than using 50% compost + any biofertilizer treatment.
