Fertilizer testing (or experimental research) is a practice activity that is purposely conducted under artificially controlled conditions. According to the purpose of the fertilizer test, it can be divided into two types: comparative test and relational test.
A comparative test is to compare the importance of various factors in a phenomenon and the effects of different states. For example, after developing a formula for a special fertilizer or foliar fertilizer, the effect needs to be evaluated through experiments. Its main purpose is to find out the size and quality of the test effects produced by different test treatments or experimental factors. This kind of test mainly adopts the difference comparison method to determine the effect of the experimental treatment and experimental factors. Comparative tests mainly include comparative tests and factorial tests.
The relationship test is to seek the quantitative laws between various variables in a specific process. For example, in order to achieve quantitative fertilization, the quantitative relationship between crop yield (or quality) and fertilizer amount needs to be established, ie we usually This is called the fertilizer effect equation. Its main purpose is to study the relationship among things, factors, things and factors, including correlation analysis and regression analysis.
In the field effect test of soil testing formula, the "3414" test design scheme is generally recommended. The "3414" program design absorbs the advantages of less regressive optimal design processing and high efficiency. It is a widely applied fertilizer-effective field trial program at home and abroad. "3414" refers to nitrogen, phosphorus, and potassium three factors, four levels, and 14 treatments. The meaning of 4 levels: 0 level means no fertilization, 2 level means the approximate value of the local optimum fertilization amount, 1 level = 2 level 0.5, 3 level = 2 level 1.5 (this level is the excessive fertilization level).
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