This valuable collection of essays reveals the insights of a brilliant soil scientist who was ahead of his time. In this volume, readers will find a carefully organized and convincing explanation of the relationship between plants and animals. Dr. William Albrecht sustains his theory and observation that a declining soil fertility, due to a lack of organic material, major elements, and trace minerals - or a marked imbalance in these nutrients - was responsible for poor crops and in turn for pathological conditions in animals fed deficient feeds from soils. These papers addressed to scientists, and especially to farmers who worked with nature are an invaluable foundation for anyone interested in sustainable agriculture.