First, caused by root diseases. In the investigation of the pear garden of the farmer Wang Mingshan, it was found that the neck of the tree was covered with white mycelium, which was initially determined to be caused by chalk disease. It could be rooted with 0.3% potassium permanganate solution or multiple Bordeaux mixture. However, in the pear orchards of other farmers, no chalk disease was found in the tree shreds, and the appearance of the roots of the trees was not abnormal.

Second, due to improper fertilization. In the past few years, this phenomenon has also occurred in other pear gardens in Qingxian County, and the chloride ions exceeded the standard. After carefully inquiring about the fruit farmers in the pear garden, they all learned that they had applied compound fertilizer. Most of the compound fertilizers purchased in the agricultural resources market contained potassium chloride. Some of them were labeled as potassium sulfate and actually contained potassium chloride. The farmers did not Identify ability. Pear trees and other fruit trees are bogey of chlorine crops. Long-term application of such chlorine-containing compound fertilizers will cause the soil chloride ions to exceed the standard, causing the tree to weaken and the leaves to dry out.

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Wrist Sphygmomanometer

Electronic smart digital Upper arm and Wrist Blood Pressure Monitor automatic.

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Main Feautures For Electronic Sphygmomanometer Automatic BP Machine Digital Upper Arm Blood Pressure Monitor:

· Measurement method: oscillometric method

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