BuildASoil BIG 6 Micronutrients + Humic Acid, 2.2 lb.Build A Soil has done thousands of soil tests and over the years and we've noticed that our particular soils are usually very high in Iron but very low in manganese and 5 other Micro nutrients like Boron, Cobalt, Copper, Molybdenum and Zinc! Once you regain balance in your Iron to Manganese relationship and bypass the limiting factors of the others, you are in a position to drastically increase yield and disease resistance. These 6 Micronutrients are