The premise of fertilization is to know how much nutrients the soil can supply and how much nutrients the crop needs to absorb. Calculate the amount of nutrients that need to be applied based on the difference between the two and fertilizer utilization, mainly referring to nitrogen, phosphorus, and potassium fertilizers.
In general, by looking at some plant nutrition textbooks or books on the use of fertilizers, one can know the total amount of N, P, and K nutrients that need to be absorbed to reach a yield of 50 kg, and the utilization rate of fertilizers. Want to know about soil nutrients? The situation requires the analysis of local soil samples.
The commonly used soil nutrient measurement values ​​refer to the conventional methods. This method is an experiment and practice over several decades or even hundreds of years. It has universal practicality, reliability, comparability, and repeatability. It is a classical method for soil fertilizer and plant nutrition. However, the conventional method requires a certain amount of capital investment. Even if it does not count the investment in housing, the investment in reagents, glass instruments and analytical instruments should be at least 30,000 yuan. This condition is more difficult for township-level agricultural technology extension departments and individual owners. The rapid test method came into being.
The rapid test method refers to the operation performed using some simple methods including simple sample processing, simple sample leaching, simple instruments, and the like. The advantages are low investment, simple operation and no need for too high technical support. The soil nutrient rapid tester currently on the market can rapidly determine the available nitrogen, phosphorus, potassium, organic matter, and trace elements in soil, fertilizer, and plants. It can also measure soil moisture, pH, and even Reducing sugar in tobacco.
The expert conducted a differential test of two methods that operated using a speedometer and the provided analysis method and operated using a conventional analysis method.
Through the experiment and comparison, it is found that the results obtained by the two methods are: there is a certain correlation between available phosphorus in soil, there is no correlation between available potassium, and there is no correlation between ammonium nitrogen.
In general, by looking at some plant nutrition textbooks or books on the use of fertilizers, one can know the total amount of N, P, and K nutrients that need to be absorbed to reach a yield of 50 kg, and the utilization rate of fertilizers. Want to know about soil nutrients? The situation requires the analysis of local soil samples.
The commonly used soil nutrient measurement values ​​refer to the conventional methods. This method is an experiment and practice over several decades or even hundreds of years. It has universal practicality, reliability, comparability, and repeatability. It is a classical method for soil fertilizer and plant nutrition. However, the conventional method requires a certain amount of capital investment. Even if it does not count the investment in housing, the investment in reagents, glass instruments and analytical instruments should be at least 30,000 yuan. This condition is more difficult for township-level agricultural technology extension departments and individual owners. The rapid test method came into being.
The rapid test method refers to the operation performed using some simple methods including simple sample processing, simple sample leaching, simple instruments, and the like. The advantages are low investment, simple operation and no need for too high technical support. The soil nutrient rapid tester currently on the market can rapidly determine the available nitrogen, phosphorus, potassium, organic matter, and trace elements in soil, fertilizer, and plants. It can also measure soil moisture, pH, and even Reducing sugar in tobacco.
The expert conducted a differential test of two methods that operated using a speedometer and the provided analysis method and operated using a conventional analysis method.
Through the experiment and comparison, it is found that the results obtained by the two methods are: there is a certain correlation between available phosphorus in soil, there is no correlation between available potassium, and there is no correlation between ammonium nitrogen.
Chlorotrimethylsilane is used to silanize laboratory glassware, which makes the surfaces more lipophilic. It is used in the production of trimethylsilyl halides, pseudohalides and various organic silicon compounds. It is also used to produce hexamethyldisilane by reduction.Miscible with ether, benzene, diethylether and perchloroethylene.
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