Abstract
A factorial experiment was conducted in a lath house during the season of 2012 to study the effect of soil addition of growth regulator (Siapton 10L) with three concentrations 0, 2, 4 ml.L_1 and foliar spray with the same concentration and their interaction on vegetative growth of sour orang seedlings using RCBD design with three replicates .
Results showed that the soil addition of growth regulator and foliar application and their interaction had a significant effect on vegetative growth characteristics. The interaction of soil addition 2ml.L_1 of Siapton 10L with spraying of 4 ml.L_1 gave the highest averages of plant height 106.67 cm, branches number 6.20 branch/plant, leaves number 79.67 leaf, and leaf area 2007.68 cm2, while lowest average of these characteristics were 34.33cm , 3.20 branch, 33.20 leaf/plant_1, and 703.84 cm2 at control .
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