Reasonable results have been obtained with products such as resin-coated granulate or ammonium nitrate polymer (26% N), sulfur-coated plums (36% N), urea condensates and urea formaldehydes (30–40% N). Fertilizers of this kind are currently considered too expensive for agriculture, but are used in horticultural services and production. Stemprotect® is an anti-pollution product based on the […]