Car tire numbers are explained using the letters and numbers printed on the side of the tire. These numbers tell you the tires purpose, the complete dimensions, the total load/weight capacity, speed rating and more. These specifications are referred to as the tire code.
Organic Soil for Turnips. Clay soil is high in minerals which are good for turnip growth, however, clay is a very dense material and inhibits the growth of tubers. To solve the problem, mix 1 wheelbarrow of sand into a 100 square foot section, and mix it in well. When mixing clay, be sure that the clumps are broken up and mixed with the sand.
Here are the turnip seeds I will be planting. This variety of turnips is called 'Purple Top White Globe'. They are fairly common, and can be found at amazon.com. These turnip seeds need to be planted at a depth of 1/2-inch deep. I use my finger to poke holes in the soil that are about 1/2-inch deep. I am planting the turnips about 10 inches apart, which enables me to plant 20 turnip plants in this box with those measurements.