Surrogates: Surrogates are added to all environmental and QC samples. Form Number Tin Iowa State University Extension.
Collecting soil samples by the correct methods is the only way to get accurate, usable data.
How soil testing sample collection can be the soil component of a soil probe or spade, and view soil samples or alkaline. Therefore, collecting and handling soil samples properly is very important. Sampling can take place during any period of the year.
Do not use galvanized metal, brass, or bronze tools to collect samples that will be tested for micronutrients, such as zinc.
Brass sieves should be avoided and it is better to use stainless steel or polythene materials for collection, processing and storage of samples. Optimum growth of turf, flowers, and plants depends on many management factors, one of the most important is ensuring a sufficient supply of plant nutrients.
This accounts for variability in fertilizer spreading as well as assuring soil test levels over critical levels for anticipated crop removal. Laboratory analysis quality control influences soil test value accuracy, but the quality of the soil sample may have an even greater influence on accuracy. The sample bag should be filled from the mixture.
Follow all QC elements defined in the method.
The field is divided into equal grid areas, then subdivided into subgrids, where the sampling point is assigned randomly. Keep your own record of the areas sampled and date mailed to the laboratory. SOIL TESTING LAB Fairview Ave.