First, there is a clear principle of foliar leaf structure, the basic structure is a leaf foliar leaf prices, petiole foliar companies, stipulate. Leaves also includes epidermis, mesophyll, veins. Mesophyll generally divided into palisade and spongy tissue (that C3 plants and C4 plants are different). Cereal crops such as grain is not full, grain weight decreased, blighted grain more; increased cotton boll rot, reduce boll shell thickness, cotton fiber quality; low sugar content of fruit and sugar cane, poor flavor; potato tubers smaller ; flue-cured tobacco leaf thickening, easy baking, high salinity content, poor quality; legumes lush foliage, little pod, lower crop yields foliar content, celery petiole thinning, leaf large easy to lodging, maternity leaves In late delay fertilizer, along with delayed harvest. In addition, too much nitrogen will increase the nitrate content in leaves, nitrosamines, betaine, oxalic acid, etc., affect the content of vegetable oils and other substances. Resulting in decreased crop quality, production, or even result in the deterioration of physical and chemical properties of soil and groundwater contamination. Especially in the protected cultivation conditions, should pay attention to the rational use of nitrogen fertilizer. Foliar company, Shaanxi fertilizer, bio-technology provided by Shouguang Marvell Marvell biotechnology company. Shouguang Maiwei Biotechnology Limited (www.maiweishengwu.com) strong, credible, Shandong Weifang biological fertilizer industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Marvell biotechnology and you work into the brilliant, for a better future!