Experiments were conducted on Para rubber cultivar Tjir 1 seedling stocks for green budding grown on KAbacan loam soil in polyethylene bags for three months to determine the nature of response to GA3 and the effects of N, P, and K either alone or in combination with GA3 on buddability in terms of some growth response parameters, bud-take, sprouting capacity, and latex flow; and to determine the relation of these parameters to the soil and leaf analysis data. Visible effects of GA3 on the rubber seedlings was manifested only at the concentrations of as high as 20,000 ppm by way of elongation of the terminal internodes and longer petioles with pale-green and reduced leaf blades which suggested that subsequent studies be conducted at higher concentration of around 20,000 ppm.
