100 страниц. 2011 год. LAP Lambert Academic Publishing Sorghum is a highly Zn sensitive crop in the cereals. Among the major cereal crops sorghum ranks fourth in the world after wheat, rice and maize. Sorghum is mostly grown in Pakistan but mainly under rain fed areas both for forage and grain purposes.Zinc is an essential micronutrient for normal crop growth and Zn deficiency can severely impair crop growth and decrease yields. Zn fertilizers and synthetic chelates like Zn-EDTA can also be used that are organic materials which upon their decomposition release certain substances which serve as natural chelates.