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. Double Arm Electric Medical Pendant
Double Arm Electric Medical Pendant with multi kinds of gas outlet and power socket can be choosed; The ceiling pendant is modular assembly, to make the medical pendant suitable to different environment use; it is inevitable choice for operation theater and ICU room;The pendant is mainly used to place monitor, electric knives and medical instruments needed by general surgery operations. Its bearing weight is more than 120kg. It could provide the necessary medical gas, power for operations with output terminal. It is equipped with all kinds of pluggable, quickly-connecting gas terminals.
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