At present, the prevention and control of crop diseases, insects, and weeds mainly involve the use of medicines to prevent and control a large proportion, and the efficacy of medicines to prevent and control diseases is composed of three parts, namely medicine, equipment, and the techniques of pesticide applicators. Most farmers tend to focus on the pharmaceutical industry. They blindly admire imported drugs and use imported pesticides. They neglect the technology of the devices and the applicators. They only consider that each acre of land uses the instructions to spray the drug into the ground. The degree of atomization of the medicine is good or bad, resulting in the farmers wasting a lot of human and material resources and failing to achieve the control effect. This is why some farmers are not aware of it. When the control effect is good, it is often considered that it is the cause of the medicine. By organizing farmers to participate in training and raising the level of scientific and technological farming of farmers, some big households have already used electric spray equipment. The technology of sprayers has not been systematically trained. It is still necessary for new farmers to really become farmers in science and technology. To further improve the scientific and technological level of farmers, not to waste labor and resources, and truly increase the efficiency of agriculture.
In a hydroponic system, plants are placed in nutrient-enriched water. Mediums such as gravels, sand or vermiculite can also be used. Thus plants which are placed in the water absorb the nutrients very easly. When the nutrients from the water starts finishing , water is recycled or additional nutrients are added.
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