


Review: Humic and Fulvic Acids. A Practical Approach – Christo Malan. PhD (Plant Physiology)
Organic Matter, Humus, Humate, Humic Acid, Fulvic Acid and Humin: Their Importance in Soil Fertility and Plant Health – Dr. Robert E. Pettit – Emeritus Associate Professor Texas A&M University
Nitrogen vs Carbon – New and Important Information – Joel C. Reid – Mesa Verde Resources
