Commonly used distance measurement methods include tape measure distance and photoelectric distance measurement. The measuring distance of a tape measure is measured along the ground using a tape-like ruler that can be rolled up, which is a direct measuring distance. Photoelectric ranging is to use an instrument to transmit and receive modulated light waves between two points, and measure the distance according to its propagation speed and time. It belongs to electronic physical ranging. Photoelectric ranging is indirect ranging. Inch Tape Measure,Tape Ruler Measurements,Length Tape Measure,1 Inch In Tape Measure Yucheng tengxu Measuring Tool Co., Ltd , https://www.txhardwaretools.com
Second, the use of herbicides in the use of vegetable mulching and cultivation of herbicides in order to be safe, economical and effective. In operation, you should also pay attention to the following points:
1. In the process of applying herbicides, the amount of water per 667 square meters should not be lower than 40-50 kg. Only by ensuring humidity can the penetration of herbicides be enhanced and the herbicidal effect can be ensured.
2, can not be repeatedly sprayed when applying, should be in place, so as not to increase the concentration of vegetables to cause phytotoxicity.
3. The volatility of trifluralin and oxazinone is strong. After application, mix well with the soil and mix well to 2 to 3 cm.
4. When covering the film, it must be tightly sealed, neither leaking the application nor leaking the cover film. It is found that the leakage film should be covered in time to ensure the coverage of the film and the herbicidal effect.
China Pesticide Network
Selection of vegetable mulching and cultivation herbicides
Vegetable cucurbitaceae vegetables, such as zucchini, cucumber, pumpkin, loofah, etc. The herbicides that can be used are: 33% weeding emulsifiable concentrate, 100-200 ml per 667 square meters; 20% grass-killing water agent, 667 square meters per 667 square meters The dosage is 100 ml; 50% acetochlor EC is 70-150 ml per 667 square meters. The above agents are respectively 40 to 50 kilograms of water, coated with a film after application, and then punched and planted.
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