Stem circumference: Stem circumference was affected by treatment (Table 2). The OBF-NPK mix treatment produced plants with the greatest stem circumference. The PM and Gliricidia mixed with NPK produced plants with similar stem circumferences. Treatment with the OBF-NPK mix produced plants with greater stem circumference than those receiving only organic manures. Stem circumference with NPK alone was significantly higher than from the organic materials. The control had smallest circumference of 40 mm.