The Hungnam Fertilizer Complex is producing nutritive liquid fertilizer and supplying it to hydroponic greenhouses.
The fertilizer consists of over ten compound microelements with calcium nitrate and potassium nitrate as a main ingredient. It ensures great economic profitability with less cost.
Hyon Ryong Yon, official of the Jungphyong Vegetable Greenhouse Farm, said: We produced 20 tons of vegetables per hectare and 150 tons to the maximum by soil cultivation. Hydroponic cultivation by means of the liquid fertilizer makes it possible to produce 300 to 500 tons per hectare.