RESPONSE OF RICE AND COMMON BEAN CROPS IN SUCCESSION TO FERTILIZATIONIN CERRADO SOIL

Low soil fertility of cerrado of Brazil is one of the most important y ield limiting factors in crops production. A field study was carried o ut for three consecutive years to evaluate response of upland rice (Or yza saliva L.) and common bean (Phaseolus vulgaris L.) to fertilizatio n in a Dark-Red Latosol in succession. The fertility levels were low, medium, high, and medium + green manure. Average dry matter, grain yie ld, accumulation of nutrients by rice and bean crops and yield compone nts of rice were significantly increased with fertilization. Average m aximum grain yield of rice was obtained with medium soil fertility + g reen manure treatment, whereas, common bean produced average maximum g rain yield at high soil fertility level. Rice yield was decreased with continuous crop production in sequences at all fertility levels.