High Resolution Distance Sensor JRT produced the high resolution optical distance measurement sensor for 16 years with lower cost. Our distance measuring sensor have small size, high accuracy. Distance Measuring Sensor,Accurate Laser Measuring Sensor,High Accuracy Distance Sensor ,Optical Distance Sensors Chengdu JRT Meter Technology Co., Ltd , https://www.accuracysensor.com
The laser range finder components is characterized by an above-average measured value output frequency, up to 8hz. The miniature laser distance module is also suitable for monitoring defined distance and height during transport.
The calcium deficiency and its prevention in greenhouse pepper
Recently, many farmers planted peppers in greenhouses to call for advice, how to control the rot of pepper fruit, after investigation found that this is pepper umbilical rot. When the greenhouse pepper lacks calcium, the tips of the leaves and the leaf margins are partially yellow, and the middle ribs of some leaves protrude. When the result was lack of calcium, the fruit developed umbilical rot or dead fruit. Generally, calcium should not be deficient in soil. However, in the greenhouse where vegetables are continuously grown for many years, when the nitrogen and potassium fertilizers are excessively applied, the soil is seriously deficient in water, and the concentration of soil solution increases sharply. Due to the antagonistic action and interaction of ions, it will cause chili peppers. Calcium deficiency. During the cultivation process, organic fertilizer should be added to avoid partial nitrogen fertilizer and prevent soil drought. After irrigation, soil should be loosened in time. In the acid-calcium-deficient soil, calcium-containing fertilizers may be added. Do not make the soil excessively dry and lack of water. When you can spray 300 times the liquid calcium chloride, 1000 times the calcium source 2000, or calcium treasure.