In most parts of the spring maize planted in the north of the country, precipitation during the April-May crop period was higher than usual, soil moisture was better, and the emergence (number and uniformity of emergence) was better than usual, and the density was reasonably increased. However, due to the pre-rainy low temperatures, the growth process of maize in this area is generally slow. At present, it is generally in the period of the small bell mouth of 10 leaves, which is 1-2 leaves later than the same period of the year. Therefore, the main field management measures in the area should be based on promotion. The first is to seize the time to carry out raking, shoveling and other cultivating measures to loosen the soil surface, increase soil permeability and increase the temperature, and promote plant growth. For the soil viscosity and low-temperature plots, it is necessary to increase the intensity of hoeing, shoveling, and other cultivating measures as soon as possible, and early emergence of strong seedlings. The second is timely fertilizer. Adhere to soil testing and formula fertilization, while deep fertilizer Application, and do fertilization and soil and soil combined. The third is to control weeds and remove disease and weak strains. The weeds that grow after chemical weeding and the sick and weak plants that can't bear stalks, the smuts, and the weaker plants can be removed manually to reduce nutrient air consumption. Fourth, watering in time should be severe drought. According to the climate and soil conditions in the area, if there is less rainfall and serious drought, it is necessary to replenish water promptly. The fifth is to promote rapid grain filling and dehydration and maturation in the late period to avoid early frost hazards. The sixth is to increase the mechanical harvesting rate and reduce field losses. Cartridges(Injection Pharmaceutical Cartridges) are mostly welcomed by self-administration of injectable drugs in consideration of safety and convenience. Zhengli top-of-the-range production lines uphold high dimension and surface quality that guarantees compatibility and reliability. Cartridges is a solution for drug storage and safety. Double chamber cartridges is designed for combinations of liquide/ liquid, liquid/powder, liquid/lyophilisate drugs. All Zhengli cartridges are manufactured and packed consistent with ISO 9001 and ISO 15378 standard. we are specialized in all sizes of Pharmaceutical Cartridges,pharmaceutical galss cartirdges,Pharmaceutical Injectable Cartridges,liquid pharmaceutical cartridges,and Injection pharmaceutical cartridges Pharmaceutical Cartridges Pharmaceutical Cartridges,Pharmaceutical Glass Cartridges,Pharmaceutical Injectable Cartridges,Injection Pharmaceutical Cartridges Ningbo Zhengli Pharmaceutical Packaging Co., Ltd. , http://www.zlpharmapkg.com