One depends on soil fertilization. Different types of trace elements contained in different soils are not the same. Only knowing that a certain element is lacking in the soil can be effectively used to make up a certain element of fertilizer. At present, the soil content can be determined based on the parent material, soil texture, soil acidity and alkalinity. Such as the lack of boron, zinc deficiency, its boron content of less than 0.5 parts per million, containing zinc less than one millionth of a million, it is a lack of fertilizer. Before we can figure it out, we can apply it on a small area and then apply it on a large area. Otherwise, if we hear about what is missing, it may be counterproductive.
Second, we must look at crops applied to different crops on a variety of micro-fertilizer needs are also different, such as rice needs silicon; rape, legumes and other needs of boron; garlic, onions need selenium.
Third, the appropriate application of trace fertilizer is generally used as base fertilizer. 100 ~ 200 grams of boron per mu, or 100 ~ 150 grams of zinc fertilizer, or 100 ~ 250 grams of ferrous sulfate, or 510 grams of copper sulfate, should not abuse.
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Laser range sensors combine the advantages of a visible red sensing beam with the increased range of a laser. The optical distance sensor devices are Class 2 lasers, support Class 1 customized. The high precision autonics distance sensor is successfully be used to connect to Arduino, Raspberry Pi, with +-1mm to 3mm high accuray, and long-range solutions (max up to 150m) for your application.
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