In 1842 Justus von Liebig publishes Animal Chemistry or Organic Chemistry in its applications to Physiology and Pathology. Jöns Jacob Berzelius publishes (6 vols., 1845–50) Jean-Baptiste Boussingault publishes (5 vols., 1860–1874; 2nd ed., 1884). In 1868 Samuel William Johnson publishes How Crops Grow. In 1870 S. W. Johnson publishes How Crops Feed: A treatise on the atmosphere and soil as related to the nutrition of agricultural plants. In 1872 Karl Heinrich Ritthausen publishes Protein bodies in grains, legumes, and linseed. Contributions to the physiology of seeds for cultivation, nutrition, and fodder See also Agronomy Fertilizer Pesticides Notes and references Agriculture Biochemistry