New liq. Ca fertilizer (Ca content 10% by mass) was developed and produced by dissoln. of hydrated lime in aq. soln. of AcOH, HCOOH and HNO(3), addn. of solid CaCl(2), EDTA and micronutrients (B, Cu, Mn, Zn), coagulation and flocculation with a polyelectrolyte of solid impurities and their filtering off. The fertilizer was used as a spray on leaves and fruits in orchards and vegetables. The industrial prod. of the fertilizer will start in 2009.