An experiment at the USDA-ARS (United States) with lettuce, using animal-derived hydrolyzed protein (PH) at a dosage of 3 ml/l for 30 days, recorded impressive results: Improved photosynthetic rate by 38.5% and chlorophyll content by 27.1% Increased number of leaves by 27.3% Increased fresh stem weight by 50.8% and dry stem weight by 40% These […]