In addition to applying nitrogen, phosphorus, and potassium fertilizers, cherry tomatoes should be supplemented with calcium and boron fertilizers. The production of 1,000 kilograms of cherry tomatoes requires 3.85 kilograms of pure nitrogen, 1.15 kilograms of phosphorus pentoxide, and 4.44 kilograms of potassium oxide. Before planting, 5000 kg of organic fertilizer was applied per mu, 200 kg of bio-organic compound fertilizer, 50 kg of urea, 30-50 kg of superphosphate, 40 kg of potassium sulfate, 100 kg of calcium fertilizer, and 1.5 kg of borax.
Generally when the first fruit begins to swell, it can be topdressed for the first time, with 5 kg of pure nitrogen per acre and 6 kg of potassium oxide. The second time dressing is the first time the fruit is about to be harvested. When the second fruit is enlarged, 5 kg of pure nitrogen per acre and 6-7 kg of potassium oxide are applied. The third dressing will be harvested in the second ear. When the third ear is enlarged, 4 kg of pure nitrogen and 5 to 6 kg of potassium oxide will be applied per mu.
Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate. Optical Windows do not cause change in the magnification of a system. Worldhawks` Optical Windows are offered in a variety of substrates, such as Germanium (Ge), Silicon (Si), N-BK7(H-K9L), UV Fused Silica, Zinc Selenide (ZnSe). Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR).
Worldhawk offers standard and high precision optical glass windows in round ,rectangular, wedge windows and custom shape and size with different optical glasses,Fused Silica, Sapphire, ZnSe, Zns and IR crystal. The high precision parallelism of 10 arc seconds, surface quality of 40/20 and flatness of λ/10. Single layer or multi-layer anti-reflection coatings are available.
Sapphire Step Windows,Sapphire Glass Windows,Sapphire Special Windows,Polished Sapphire Glasses
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