The effect of malt residue + eucalyptus chip compost, chicken litter and urban solid waste compost was evaluated in Limeira (Brazil) on yield and nutrition of tomato, cultivated in greenhouse, and on chemical properties of an Oxisol soil. The experiment was carried out from May to November/97 and consisted of a complete randomized blocks design, with four replicates and treatments disposed in a factorial design 3 x 4: three organic wastes (malt residue + eucalyptus chip compost, urban solid waste compost and chicken litter) and four application rates equivalent to 0; 100; 150 and 200 kg ha-1 of nitrogen. Such N rates were estimated based on N contents in the organic materials that were applied at 7.0; 10.5, and 14 t ha-1 of malt sludge + eucalyptus chip compost (CLC); 8.2; 12.3 and 16.4 t ha-1 of urban solid waste compost (CL); 2.9; 4.4 and 5.9 t ha-1 of chicken litter (CF). The highest fruit weight was obtained with CLC at the rate equivalent to 150 kg ha-1 of N as compared to CL. The number of fruits per plant and marketable yield were larger with the addition of CLC and CF than the CL. The yield and nutrition of tomato and soil chemical characteristics were not influenced by rates of organic materials applied.
Lycopersicon esculentum; compost; soil chemical properties
