Sampling method for soil nutrient determination by soil nutrient rapid tester

Soil testing and formula fertilization technology is an important way for farmers to increase their income. Through two years of work experience accumulation, we found that in soil and crop testing work, in general, sampling error is often better than field operation error, reagent error, food error, etc. Too big. Therefore, it is necessary to pay attention to the collection of representative or typical samples according to the purpose and requirements of the quick test. The soil nutrient rapid tester is one of the important instruments for determining soil nutrient content, and the results are also very accurate and reliable.

When the soil nutrient rapid tester performs soil nutrient rapid measurement, the soil sample usually used for testing is a small amount, and the test results are representative of large-area plots. Sampling errors are generally much larger than assay errors. The key to reducing the sampling error is that the collected soil samples should be fully representative. Generally, the sampling area is first divided into several sampling parcels. The topography in the same sampling plot, recent tillage and fertilization measures, crop phase and yield levels should be basically the same. The area of ​​each sample plot should not be too large, generally not exceeding 3.3 hm2 (50 mu). The distribution of sampling points should take care of the overall situation of the soil as much as possible. Do not concentrate too much. Do not sample at the roadside, ditch, near the channel and at the bottom of the dung. Because these places do not represent the average fertility level of the plot.

Using the soil nutrient rapid tester, it was found that the above sampling method should be combined with local farming and cultivation methods in practical application. For example, in order to formulate a fertilization scheme, it can be sampled on the ridge platform before sowing or before fertilization. The sampling depth should be calculated from the height of the ridge platform, and the soil sample of 0-20 cm deep is taken from the transverse ridge. If during the crop growth period, in order to guide the topdressing sampling, the crop root system should be considered, especially the distance between the corn plants is large, the mouth fertilizer is applied in the hoe during sowing, and the difference in soil fertility near the root zone or far away is large. It is necessary to sample multiple points, and then mix them in the vicinity of the plant (about 10 cm) and between the two ridges. If corn and other crops are intercropped and sampled for corn topdressing, only the area where the corn is planted is sampled.

Strip Cap

Caps and High Quality Caps; We are a professional Chinese manufacturer of Caps, and look forward to your cooperation!