US Patent 9919976 Soil conditioners and method of making them

Soil conditioner compositions including manure-based organic fibers, pyrolytically processed into biochar. Also included are soil amendment compositions including growth factors such as nitrogen, phosphorus and potassium available for plants. Those growth factors may be obtained from the further processing of a liquid portion effluent resulting from heat-agitated anaerobic digestion of manure used to produce the fibers for the manure-based soil conditioner.