Analyzing Your Soil Testing your soil is the smart way to start and maintain your garden. Only by knowing the nutrient levels in your soil can you determine what you need to add to your garden in order to maximize growth. You can't look at the soil, or smell it, or feel it and tell whether it has 10 pounds or 100 pounds of available phosphorus per acre.
Potassium is responsible for seed formation and germination in flowers, fruits, or vegetables.