This bulletin is a report of one phase of research in agronomy. What is agronomy? Agronomy is the science of crop production and soil management and includes a scientific study of all phases of soils and soil conservation, irrigation practices, fertilizer usage, crop rotations, plant breeding, selection and management of new crop varieties, weed control, and other practices that lead to increased production of better quality crops.
Nielson, R. F.; Thorne, J. P.; and Baird, G. T., "Bulletin No. 374 - Fertilizer Reuirements of Alfalfa Hay in Utah" (1955). UAES Bulletins. Paper 334.