Watermelon

Treatment: The experiment is set up with two treatments, namely CK (100 kg/acres of inorganic compound fertilizer) and HA (80 kg/acres). Fertilization is applied evenly in four times, at the periods before transplanting, and 1 month, 2 months, and 3 months after transplanting. Other operations follow conventional practices.

Figure23. The situation of root-knot nematode infestation in watermelon root system under various treatments

Result: Compared with the control, no root-knot nematode infection was observed in watermelon roots treated with humic acid.

Table3. The results of various treatments

Result: Compared with the control, the application of humic acid significantly improved both the quality and sweetness of watermelon.