fig5

Figure 5. (A) Field plot study at the University of Florida’s Plant Science Research and Extension Unit, Citra, Florida with silage corn (Zea mays). Treatments were: Poultry litter biochar (760 kg biochar ha^-1, same total P rate as inorganic fertilizer), inorganic P (20 kg P ha^-1) per cropping cycle and control plots with no P additions. (B) Mean biomass (t ha^-1) harvested in a two-year-long cropping cycle (rye, silage corn, sorghum) followed by the same letter are not statistically different at the 5% level^[16,84]. Photo credit: Barbra Larson.