For decades, growers have been using this famous inoculant, developed by Dr. E. E. Pfeiffer, the father of the Bio-Dynamic movement in the U.S. It contains 55 strains of nitrogen-fixing, decomposing and other soil bacteria, plus enzymes and hormones in a specially prepared herbal base. An outstanding inoculant which creates true humus. Comes with complete directions for use. Each unit inoculates 1 ton (1-2 yd) of raw material.