12 bucks for the one I got. I can't remember the other three
But I sent them a email asking for a price list
How To Take A Soil Sample...From Waters Agriculture Lab Inc.
Size of Sample Unit
The first step in a sound sampling procedure is to subdivide the area into uniform units. Do not assume that fields enclosed by fences are uniform units. In subdividing a field, use past history and visual differences reflected by changes in soil type for first approximations. Avoid areas where fertilizer or liming materials may have been spilled, gate areas where livestock have congregated, poorly drained areas, or fertilizer band areas of last year’s crop. It is also advisable to stay at least 50 feet from barns, roads, lanes or fence rows. Within fields that appear uniform, 20 to 25 acres is the acceptable unit size, with the size increasing as the area of uniformity increases. Of course, the more borings (sub samples) taken within a sample unit, the greater the accuracy of the sample. However, one sub sample per 2-2 ½ acres should be adequate.
How to Sample
When sampling, work your way through the field in a zigzag pattern collecting the samples with a stainless steel or chrome plated soil probe. Place and mix the soil cores in a clean plastic bucket. Sample depth should be at least 8-10 inches, or plow depth. For turf, lawns, and pastures, sample depth should be 4 inches. After thoroughly mixing the soil, place 6 to 8 ounces (1 cup) of soil in a soil sample bag. The bag should be clearly marked with your name, address, and sample identification. Fill out the soil information sheet as completely as possible. Be sure the sample numbers on the information sheet correspond with the numbers on the sampling bag and is included with samples when shipped to lab.