Full fertilizer certain fertilizers such as phosphorus, iron, manganese, copper, and zinc, etc., if applied as a root, soil easily fixed, the impact applying effects, and limit the use of foliar application of soil conditions will not be affected. Again, some fruit trees and other crops in some deep roots absorb nutrients than less, if the traditional methods can not be applied to the root fertilization absorption site, we can not fully play its fertilizer, and spraying can get better effect. Nitrogen for crop structure and composition of elements in crop production process of the use of nitrogen is essential, but often result in an excess of nitrogen fertilizer foliar series, crop adverse symptoms appear, to help us in the future fertilizer (leaf leaven) used in scientific fertilization, prone to symptoms of excessive N analyzed as follows: too much nitrogen fertilizer, crop growth period is often delayed, greed green late, short growing season for some crops, can cause longer growing season, vulnerable to frost damage. Excessive nitrogen foliar nutritional leggy body production, thin cell walls, increasing the leaf area, dark green leaves, cell juicy foliar prices, plant soft, vulnerable to mechanical injury and cause fungal diseases of plants. Population density, poor ventilation and light, easily lead to premature aging of the lower leaves, poor resistance, easy to lodging, seed rate. Foliar using biotechnology _ _ Marvell Hainan foliar provided by Shouguang Maiwei biotechnology company. Shouguang Maiwei Biotechnology Limited (www.maiweishengwu.com) (http://www.maiweishengwu.com) Shandong Weifang, a leader in bio-fertilizer, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness , and satisfy customer needs. Marvell biotechnology leader in the staff warmly welcome all inquiries negotiations to create Marvell biotechnology a better future. You can also access (http://www.maiweishengwu.com/supply_details_37848108.html), for more information about the company.