3 services found
A soil test is only as good as the sample provided to the testing lab. Generally, a subsample should be taken from the layer of the soil from the surface to 7 inches eep. Three to five subsamples should be collected from 3 to 10 acres. Because of soil variations, taking too few samples by subsampling too large an area may not give an accurate fertility map of the field. Remember, sampling is the most critical part of soil testing.
High crop yields and quality depend on many factors - adequate water and nutrients, the correct plant population and variety, disease and insect resistance or control, etc. One of the most important is nutrient status of plants, which reflects the nutrient supply of the plant at the time of the sampling.
The ISTA-LAP Program ensures that member laboratories provide their clients with reliable and accurate test results through lab participation in a quality assurance program.