THE EFFECT OF HUMIC ACID AND HIGH POTASSIUM ON SOME GROWTH CHARACTERISTICS AND YIELD OF CAULIFLOWER

The experiment was conducted at the agricultural research station during 2018-2019 planting season to determine the effect of two levels of humic acid (1.5, 3.0) g L-1, high potassium composite fertilizer (1.5, 3.0) g L-1 and the number of treatments (twice and three times) on the growth and production of cauliflower. Randomized Complete Block design was used and the mediums were tested by lest significant deference at 0.05 probability. The most important results show that the potassium treatment had a significant increase in most indicators of vegetative growth, yield and chemistry, the maximum yield (25.45 t.ha-1) was obtained with 3 g.l-1. While the humic acid had a significant increase in chlorophyll, percentage ratio of dry matter in leaves and curd, percentage of nitrogen and potassium in leaves. The number of treatment has effect in the curd weight, total yield, carbohydrates and percentage potassium in leaves. The interaction between both factors had significant increase in all characteristics of the study.