Corn fertilization should take into account factors such as variety characteristics, soil conditions, yield levels, and cultivation methods. The yield per mu is calculated based on 500-600 kg, about 16 kg of pure nitrogen, about P2O55 kg of pure phosphorus, and about K2O15 kg of pure potassium. The base fertilizer is used to fertilize pigs and cows with a fat of about 1000 kg. When planting, 30 kg of 30% compound fertilizer is used for planting. Add 0.5-1.0 kg of boron fertilizer and 2 kg of zinc sulfate fertilizer and mix well. The fertilizer should not be directly mixed with seeds. Contact, after the seedlings, the application of 30% compound fertilizer 35 kg, potassium chloride 10 kg. When the big bell mouth is used, 15 kg of urea or 40 kg of ammonium bicarbonate is applied per acre, and the soil is deeply applied. The fertilization method of “light, medium and heavy, and then supplement†should be mastered. Flat Field Holographic Concave Grating
The Concave Grating has the advantage of being able to constitute a spectroscopic system without any assistance from concave mirrors or similar types of image-forming elements. For this reason,the Concave Grating is used in a wide range of applications, such as analytical instruments,optical communications,biotechnology,and medical instruments. Spectroscopes incorporating concave gratings are classified roughly into two groups: polychromators or monochromators.
Please contact us for Customing Sizes and types of gratings.
Holographic gratings: Flat Field Holographic Concave Grating,Flat Field Concave Grating,Spherical Holographic Grating,Aberration Corrected Holographic Grating China Star Optics Technology Co.,Ltd. , https://www.opticsrealpoo.com
China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300x300mm2 for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
How to formulate fertilization of corn
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