TY - Data T1 - Irrigation theory and practice A1 - Documentation Information Center DO - 10.12389/ariddc.01907 PY - 2026 DA - 2026-09-17 PB - Arid Land Ecology and Resources Science Data Center AB - Professor Orson W. Israelsen of the Utah State Agricultural College in the United States authored Irrigation Principles and Practices. The first edition was published in the United States in 1932, and a Russian translation was published in the Soviet Union in 1936. The second edition was published in the United States in 1950 after revision and expansion by the author. Professor Israelsen's new edition differs considerably from the first edition: Chapters 15, 16, and 17 were removed; Chapters 18, 19, and 20 were condensed; and certain passages in several chapters were deleted. At the same time, new chapters were added, including those on the drainage of irrigated lands and on irrigation administration in the United States. New material was also incorporated into several chapters: data on irrigated areas up to 1948 were provided; information was added on pumping water, well installations, and the calculation of water-lifting costs in the United States; materials on field moisture capacity, wilting moisture content, and water movement in unsaturated soils were expanded; salinity indicators for irrigation water and salt-tolerance data for various crops were included; data from American research work were updated and enlarged; and a new bibliography containing 300 references on irrigation was compiled.It should be noted that the irrigated-area statistics up to 1948 presented by the author differ from those provided by other authors, particularly Horne and Peterson. For example, according to Israelsen, the irrigated land area of India and Pakistan amounted to 24 million hectares, whereas British sources estimated it at 28 million hectares. The irrigated area of the Soviet Union in 1948 is listed in the book as 3.2 million hectares, while the actual figure was approximately twice as large.The calculations for furrow irrigation were omitted from Chapter 6. Information on this principal irrigation method in the United States is presented rather briefly and in an empirical m DB - EGIDC UR - https://data.dcxjegi.cn/portal/metadata/63fc7560-3ecb-4c4c-9154-f2b1e855b464 ER -