First, we must pay attention to the application of good reduction fertilizer. Each acre can be applied to the farmer's home made compost or fertilizer about 4,000 kilograms, while the application of nitrogen fertilizer 30 kilograms, 50 kilograms of phosphate fertilizer, potash 10 to 15 kilograms, combined with spraying a new high fat film to improve the effective utilization of fertilizer. Second, it is necessary to plow the pear yards as early as possible. For some low-lying or sloped pear orchards, after the fruit is picked, it must be plucked in the winter to deepen the soil so that the winter sun and winter sun can be used to ripen the soil. The surface of the soil can be sprayed with 600-800 times of new high-fat membrane in time to ensure the water vaporization and evaporation. Sun protection against drought, thermal insulation, anti-freezing, suffocation and isolation of pests and diseases. With the help of dumping the garden to clear the gutters, the water can be discharged in clear water and the dark water can be filtered. Third, early prevention of pests and diseases, purify the living environment. Premature defoliation of pear trees is not only related to fertilizers but also related to pests and diseases. To this end, first of all, we must thoroughly clean up the residue and leaves of pear orchard, and bring them out of the park for burning. Second, scrape off the old bark, dig out the deeper pests, and timely spray the tree to prevent and treat the bacteria. Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.
Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified.
Micro Lens,Micro Cylindrical Lens,Cylindrical Micro Lens,Broad Spectrum Cylindrical Lens ChangChun Worldhawk Optics Co.,Ltd , https://www.worldhawk-optics.com
Worldhawk can offer cylinder Lenses include convex Cylindrical Lens, concave cylindrical lens, Meniscus Cylindrical Lens, and Doublet Achromatic Cylindrical Lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating.
