Take the time to test the soil properly ... and then compare the resulting color against the nitrogen color chart provided ...

Before applying fertilizer or any other soil amendment, it's a good idea to see what the soil already contains. That way you ...

Nitrogen is often the most limiting nutrient in growing plants. When deficient, plant yields and quality are reduced. However ...

Field trials on nitrogen-fixing microbes in corn have yet to show reliable yield benefits, but work continues on their ...