The the health of your soil use Horn Manure Preparation.
Horn Manure is a specially fermented cow manure preparation. It is sprayed towards evening as rough water droplets directly on the soil prior to sowing and planting. It encourages healthy root growth, assists the plant in finding nutrients and mediates the terrestrial forces of life. Under drought situations it encourages deep rooting.
One unit of horn manure (20mls) or one unit of horn silica (1ml) stirred in 10-15 liters (3gals) of water, is enough for one acre. For larger acreages proportionately less horn manure and more water can be used. Full instructions are sent with each order.