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How to Choose an Automatic Vacuum Cleaner Many robotic vacuum cleaners come with advanced sensors and smart-mapping technology. These features assist them in navigating homes and tackle tough corners. These are also great for those suffering from allergies, since they can reduce the amount of pet hair and dust that come into contact with them. The Eufy X10 is a top pick. It is equipped with the best object avoid

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Taking the main production area of yam in North China Plain as the research area, we analyzed the status of soil fertility and fertilizer application in yam production through field investigation and tracking monitoring, examined soil nutrient balance using the input-output model of nutrients in agricultural system, and assessed the environmental risks in the yam planting system. The results showed that 1) the contents of soil organic matter and total N were extremely low, and the contents of available P and available Zn were both low;