UUS_8p2c12HAR.xml Guide to the George H. Hargreaves papers Hargreaves (George H.) papers Finding aid created by Kaisha Mills, Heather Housley, and Kelly Rovegno Utah State University, Merrill-Cazier Library, Special Collections & Archives 2025

Merrill-Cazier Library Utah State University 3000 Old Main Hill Logan, Utah 84322-3000 Business Number: 435 797-8248 Fax Number: 435 797-2880 scweb@usu.edu https://archives.usu.edu/

This finding aid was produced using ArchivesSpace on 2026-02-09. Description is written in: English, Latin script. Finding aid based on DACS (Describing Archives: A Content Standard), 2nd Edition. 2026 Revised to include additional materials (Box 14) Utah State University, Merrill-Cazier Library, Special Collections & Archives George H. Hargreaves papers Hargreaves, George H. UUS_8.2:12 HAR 6.75 linear feet 14 boxes 1950-2010 This collection contains publications, photographs, office files of George H. Hargreaves, irrigation research engineer and research professor emeritus at Utah State University English , Spanish; Castilian , French .

George H. Hargreaves lived from 1916-2009. He earned his bachelor's degree in soils from the University of California, Berkeley and a civil engineering degree in 1943 from the University of Wyoming. He served as an officer in the US Navy in WWII from 1943- 1946. Hargreaves worked for various universities and governmental agencies in soils, irrigated agriculture, or water resource development. He was employed overseas for over 25 years in 25 countries doing teaching, research, administration, supervision, and planning. These countries include: Brazil, Honduras, Peru, Haiti, Colombia, Philippines, Greece, Nicaragua, Costa Rica, Panama, El Salvador, Guatemala, and Thailand, among others. Hargreaves authored over 60 publications. He was a member or fellow of multiple scientific and professional societies including the American Society of Civil Engineers, the American Society of Agricultural Engineers, the Irrigation Association, and the International Commission for Irrigation and Drainage. He worked at Utah State University as a research engineer and professor from 1970-1986.

This collection contains publications, papers, correspondence, teaching files, research files, and professional and personal files. These files give greater background into the work and life of George H. Hargreaves. He dedicated countless hours to researching and improving irrigation techniques and formulas. His research in irrigation provides understanding to the workings of water resources, crop coefficients, and evapotranspiration methods in the United States and abroad. This data can be used to research his estimates and analysis of the cause and effect of irrigation, allowing for further development of resources and techniques for irrigated agriculture.

No restrictions on access, except: not available through interlibrary loan.

It is the responsibility of the researcher to obtain any necessary copyright clearances.

Permission to publish material from the George H. Hargreaves papers must be obtained from the University Archivist and/or the Special Collections Section Head.

Initial Citation: George H. Hargreaves papers USU_8.2:12 HAR. Special Collections and Archives. Utah State University Merrill-Cazier Library. Logan, Utah.

Following Citations:USU_8.2:12 HAR, USUSCA.

These materials were donated to USU Special Collections and Archives in 2023 by Oliver Hargreaves, grandson of George Hargreaves.

This collection is arranged by material type, then in either chronological order or alphabetical order, depending on type.

Irrigation engineering. Irrigation engineering Irrigation farming--Photographs Irrigation farming--Slides Water management. Land Use I. Personal files Curriculum Vita, biographical information 1968-2000 1 1 Awards 1960-1978 1 2 Masters thesis of George Leo Hargreaves (son): Water Requirements and Agricultural Benefits for the Senegal River Basin 1983 1 3 Tipton Award - ASCE 1997 1 4 Various Employment Forms 1968-2001 1 5 Assorted group photographs 1950's-1990's 1 6 Legal documents 1962-1984 10 1 Assorted Notes, Drawing of Hargreaves undated 13 18 II. Correspondence Correspondence 1971-1999 1 7-18 III. Professional files Professional Services Contract, Honduras 1977 2 1 Academy of Independent Scholars 1982 2 2 United States Committee on Irrigation and Drainage (USCID) meeting minutes 1987-1997 2 3-4 USCID Members 1993-1999 2 5 International Irrigation Center South African Rainfall memorandum undated 2 6 Negatives, slides, photographs of crops, irrigation 1952-1994 2 7-9

Includes images of international travel to Jamaica, Greece, Panama, Venezuela, and Costa Rica. See also Box 5 fd. 32

IV. Teaching Files Grass Eto (evapotranspiration) Graphs 1982 2 10 Irrigation Scheduling Course 1984 2 11 Water Management Synthesis II Project Trip Report Irrigation Scheduling Course 1984 2 12 Course on Irrigation Water Production Functions 1985 2 13 Report of Training Courses in Irrigation Water Production 1985 2 14 Figures and Tables for Irrigation Fundamentals 1994 3 1 Books Sent to Escuela Agricola panamericanna at Zamarano Honduras undated 3 2 Economic Benefits and Employment of Irrigation Development undated 3 3 ETo Teaching Examples and Tables undated 3 4 Figures and Notes for Crop Modeling Course undated 3 5 Graph Overhead Projections undated 3 6 Homework undated 3 7 International Conference on Dryland Farming presentation undated 14 11-12 Selection of Pump and Power Units undated 3 8 Water Measurement undated 3 9 Workshop on Weather and Agricultural Production undated 3 10 Irrigation Scheduling: A Short-Course Manual 1992 13 17 V. Research Files Agrometeorology of Corn undated 3 11 Climate Change Research undated 3 12 Climatic Tables for Project Planning in Selected Countries of Africa and the Near East 1983 3 13 Crop Coefficients undated 3 14 Data Base Accumulation and Management undated 3 15 ETo and Temperature undated 3 16 ETo Comparison Values undated 3 17 Evapotranspiration and Irrigation Scheduling 1996 3 18 Field Observation and Recomendations undated 3 19 Need for Surface Drainage in Honduras undated 3 20 Project Proposal: Agrotechnology Transfer for the Sahel 1984 3 21 Project Proposal: Classification of the Oxisol and Ultisol Areas of Tropical America undated 3 22 Second Evaluation of the USAID/Government of El Salvador Water Management Project 1990 3 23 Standard Deviation of Temperature undated 3 24 Suitability Zoning for Wheat Production in the Philippines undated 3 25 Time from Planting to Maturity for Hybrid Maize undated 3 26 Transfer of Public Sector Irrigation System undated 3 27 VI. Publications and papers Publications by title, alphabetically Accuracy of Estimated Reference Crop Evapotranspiration 1989 3 28 Acquiring and Using Information for Conservation Decisions on Water Resources undated 3 29 The Adequacy and Availability of Surface Water undated 14 1 Advances in Surface Irrigation: Chapter - Fundamental Considerations, with Zohrab A. Samani undated 3 30 Agricultural Benefits for Senegal River Basin, with J. Paul Riley 1985 3 31 The Agroclimatic Model for Agrotechnology Transfer (AMAT) undated 3 32 The Aid and I undated 3 33 Applications of a Climatic Data Base For Africa, with Zohrab A. Samani undated 3 34 Aridity and Other Biases in the Cimis Weather Data undated 3 35 Cambios Climaticos en el Futuro Y las Implicaciones en los Paises en Desarrollo undated 4 1 Case Study 1: Anticipated and unanticipated Changes in the Social System in El Salvador undated 4 2 Climate and Food Grain Production 1980 4 3 Climate and its Influence on Potential Crop Production, with Zohrab A. Samani undated 4 4 Climate Change and Third World Agricultural Development 1981 4 5 Climate Change and Turf Water Use undated 4 6 Climate Manual for Agrotechnology Transfer 1984 4 7 Coeficientes de Cultivo para Uso a Nivel Mundial undated 4 8 A Comparison of Availability and the Field Capacity undated 4 9 A Comparison of Computed Values of ETo for Two Imperial Valley Sites undated 4 10 Comparison of Methods for Estimating Ryegrass ET undated 4 11 A Comparison of Two Methods of Estimating ETo undated 4 12 A Comparison of Two Methods of Estimating Solar Radiation at the Surface undated 4 13 Comparisons With and Use of FAO Crop Coefficients undated 4 14 Competitiveness of Irrigation in the Developing Nations undated 4 15 Computation of ETo Under Nonideal Conditions, with DT Jensen, B Temesgen, RG Allen 1997 4 16 Computation of Irragation Requirements of Sugar-Cane from Climatic Data 1956 4 17 Computing ETo and Relative Potential Crop Yield, with DT Jensen, B Temesgen, RG Allen 1995 4 18 Conjunctive Use of Irrigation and Rainfall in Crop Production, with Zohrab A. Samani undated 4 19 Consumptive Use Derived From Evaporation Pan Data 1968 4 20 Consumptive Use of Water and Irrigation Water Requirements, with Robert W. Will 1977 4 21 Crop ET Modeling 1990 4 22 Crop Production Models in Water Management, with Zohrab A. Samani 1987 4 23 Crop Selection for Irrigated and Dryland Agriculture, with Luis A. Manrique, Fatin Karahaliloglu undated 4 24 Crop Water Requirements and Scheduling Manual for System B of the Mahaweli Development Project 1985 4 25 Crop Water Requirements for Bangladesh, with Zohrab A. Samani 1985 4 26 Crop Water Requirements for the Sengal River Basin, with J. Paul Riley 1983 4 27 Defining and Preparing for Drought in Europe undated 4 28 Defining and Using Reference Evapotranspiration 1994 4 29 Description and Recommendations Honduran Water Resource Institutions 1978 4 30 Designing a Supplemental Irrigation System, with Zohrab A. Samani 1989 4 31 Developing Practical Agroclimatic Models for Sorghum and Millet 1984 4 32 Development of Data Bases for Simulation of Daily Weather in Developing Countries undated 4 33 Discussion of Humid Area Soils and Moisture Factors for Irrigation Design Proceedings 1954 4 34 Discussion of Irrigation Potentialities in Arkansas Proceedings 1954 4 35 Economic Considerations of Deficit Irrigation 1984 5 1 An Economic Model of Deficit Irrigation, with Zohrab A. Samani 1982 5 2 The Effect of Climatic Changes on Evapotranspiration and Runoff 1993 5 3 Effect of Planting Date on Rainfed Agriculture in El Salvador, with Zohrab A. Samani undated 5 4 Environmental Changes from Surface Water Development undated 5 5 Estimating Crop Evapotranspiration Requirements undated 5 6 Estimating Crop Yields from Simulated Daily Weather Data, with Zohrab A. Samani 1987 5 7 Estimating Monthly Runoff from an Ungauged Watershed 1994 5 8 Estimating Potential Evapotranspiration 1982 5 9 Estimating Rainfall Depth-Duration Amounts undated 5 10 Estimating Rainfall Probabilities from Average Values, with Zohrab A. Samani 1986 5 11 Estimating Reference Crop Evapotranspiration (ETo) undated 5 12 Estimating Runoff from Precipitation and Temperature 1993 5 13 Estimating Solar Radiation undated 5 14 Estimating Solar Radiation from Temperature undated 5 15 Estimation of Areal Actual Evapotranspiration undated 5 16 Estimating surface-water runoff from precipitation and temperature undated 14 2 The Estimation of Evapotranspiration undated 5 17 Estimation of FAO Evapotranspiration Coefficients undated 14 3 Estimation of Potential and Crop Evapotranspiration 1974 5 18 Estimation of Solar Radiation 1977 5 19 Estimation of Standard Deviation of Potential Evapotranspiration, with Zohrab A. Samani 1988 5 20 Evaluation of Length of Precipitation Records for Honduras 1977 14 4 Evaluation of the Irrigation Component of the HAD II Project 1991 5 21 Evaluation of Weather Simulation and Maize Yield Models, with Zohrab A. Samani and Edgar Zuniga undated 5 22 Evaluating the Conjunctive Use of Rain and Irrigation, with Zohrab A. Samani and Edgar Zuniga undated 5 23 Evapotranspiration and Its Relation to Ground Water Recharge undated 5 24 Evapotranspiration Comparisons for Haiti, with Zohrab A. Samani undated 5 25 Evapotranspiration Estimates in Extremely Arid Areas undated 5 26 Evapotranspiration Formulae undated 5 27 Evapotranspiration in Rainfed Agriculture 1995 5 28 Extreme Rainfall in Africa and Other Developing Areas 1988 5 29 Final Evaluation of Irrigation Development Project 1993 5 30 Final Report Acuerdo 141 1980 5 31 Greece and Haiti - Success or Failure 1982 5 32 Guide Pratique de L'Agriculture Pluviale a Haiti undated 5 33 A Handbook for Agricultural Technology Transfer undated 5 34 Highlands Agricultural Development Project: Phase II, with others 1991 5 35 Historical Outline of California Irrigation undated 5 36 The History of the Hargreaves ETo and Other Equations undated 14 5 Honduras Reporte Final 1980 5 37 Honduran Food Imports undated 6 1 How Agroclimatic Information Systems Help Farmers 1981 6 2 How Cropping Choices Influence the Economy and the Environment undated 6 3 How Temperature Biases Influence the Use of the Hargreaves ETo Equation undated 6 4 Hydrometerorologic Data for Honduran Water Resources Development 1992 6 5 The Importance of Cropping Choices 1994 6 6 Improved Utilization of Irrigation and Drainage Projects in Latin America undated 6 7 Improving Efficiencies of Irrigation Research, with Zohrab A. Samani undated 6 8 Improving the Use of Weather Data 1991 6 9 Improving Water Use Efficiencies by Irrigation Scheduling undated 6 10 Integrated Approaches to Water Management 1996 6 11 Integrated Development of the Sula and Aguan Valleys 1997 6 12 Investigation Agricola 1990 6 13 Irrigation and Drainage in Harmony with the Environment 1994 6 14 Irrigation and Drainage Problems in Haiti 1955 6 15 Irrigation Fundamentals 1994-1996 6 16 The Irrigation of Sugarcane as Practiced in Haiti and Suggestion for Possible Research and Improved Efficiencies 1953 6 17 Irrigation Requirements Based on Climatic Data 1956 6 18 Irrigation Requirements Computations for Africa undated 6 19 Irrigation Requirements for the Mahaweli Project, with Zohrab A. Samani undated 6 20 Irrigation Requirements from Evaporation, with J.E, Christiansen 1970 6 21 Irrigation Requirements of Sugar Cane and Bananas 1952 6 22 Irrigation Scheduling, with Zohrab A. Samani 1991 6 23 Irrigation Scheudling and Water Management, with George L. Hargreaves undated 6 24 Irrigation Water Requirements for Senegal River Basin, with G. Leo Hargreaves and J. Paul Riley 1985 6 25 Land Development for Agriculture by HIMAT 1993 7 1 Les Recommandations pour les predicitions de l'utilisation des eaux d'irrigation undated 7 2 Lysimeter Methods of Measuring Evapotranspiration undated 7 3 Making Irrigation More Profitable and Competitive in the Developing Countries 1996 7 4 Mean Monthly Tempuratures in Panama undated 7 5 Method for Estimating Consumptive Use of Water for Agriculture, by Wendell C. Munson, discussion by George H. Hargreaves and others 1962 7 6 Methods of Measuring Evapotranspiration undated 7 7 Un Metodo Para Calcular Intensidades de Precipitacion en Centromerica, with Kenneth J. Vogler 1980 7 8 Minimum Climatic Data for Irrigation and Drainage Planning and Design 1993 7 9 Modeling the Hyrologic Influence from Climate Change, with George L. Hargreaves 1992 7 10 Modeling Yields from Rainfall and Supplemental Irrigation, with Zohrab A. Samani and Edgar Zuniga 1989 7 11 Modelos Sencillos Hidrologicos, with Kenneth J. Vogler undated 7 12 Moisture Availability and Crop Production 1975 7 13 Needs and Policies for Irrigation in Guatemala undated 7 14 Needs and Policies for Irrigation in Honduras 1991 7 15 Needs for Irrigation, Drainage, and Flood Control in Colombia, with Luis D. Lasso 1995 7 16 Planning and Management for Agriculture, with Zohrab A. Samani undated 7 17 Planning and Modeling the Conjective Use of Water, with Zohrab A. Samani 1987 7 18 Planning to Meet Future Water Needs 1998 14 6 The Potential for Rainfed Agricultural Production in Senegal undated 7 19 Practical Applications undated 7 20 Precipitation Adequacies for Short Time Periods for Central America 1977 7 21 Precipitacion, Clima Y Potencial Para Production Agricola en Costa Rica, with J. Karl Hancock 1977 7 22 Precipitation Probabilities, Climate and Agricultural Potential for El Salvador, with J. Karl Hancock and Robert W. Hill 1987 7 23 Pre-feasibility Study Suarez River Proposed Irrigation Project Colombia 1971 7 24 Probable Maximum Precipitation 1983 7 25 Prologue undated 7 26 A Proposed Water Development Program for Recursos Hidricos 1980 7 27 A Proposed Water Resources Program for the Ministry of Natural Resources, with H. Van de Wetering 1978 8 1 Rainfall and Water Requirements Manual for Mali, with Zohrab A. Samani 1986 8 2 Rainfed Agriculture in Haiti: a Practical Manual, with Zohrab A. Samani 1983 14 7 Recommendations for Predicting Crop Water Use 1993-1994 8 3 Reference Crop Evapotranspiration from Temperature, with Zohrab A. Samani 1985 8 4 Requirements for Irrigation of Sugar Cane Santa Cruz, Folivia 1971 8 5 Responding to Tropical Climates--An Approach 1981 8 6 Results of Coffee Irrigation and Fertilization, with Eng. Fernando Ribelro do Valle 1970 8 7 Scheduling Sugar Can Irrigaion by Computer Computation 1971 8 8 Selection of Irrigated Crops for the Developing Countries 1988 8 9 Simple Hydrologic Modeling, with Kenneth J. Vogler 1984 8 10 Simple Model for the Impact of Climate Change on Water Yield, with J. Paul Riley and others 1992 8 11 Simplified Data Base for Crop Yield Models, with Zohrab A. Samani and others undated 8 12 Simplified Irrigation Scheduling and Crop Selection for El Salvador, with Zohrab A. Samani 1987 8 13 Simplified Method for Rainfall Intensities 1981 8 14 Small Pumping Plants for Irrigated Agriculture, with Richard E. Griffin undated 8 15 Social and Environmental Reasons for Inventory Resources undated 8 16 Solar Radiation and Irrigation Development undated 8 17 Some Environmental and Social Aspects of Water Development 1996 8 18 Some Uses of Reference Evapotranspiration 1994 8 19 Strategy, Status, and Policies for Irrigation Development in Honduras undated 8 20 Synthesized Weather Used With Crop Models to Optimize Planting Dates, with Zohrab A. Samani and Edgar Zuniga undated 8 21 A Ten Year Program for Irrigation Development 1992 8 22 Use of a Monthly Data Base for Crop Planning, with Zohrab A. Samani and others undated 8 23 User's Guide for Crop Water Use 1993 8 24 Uses for a World-wide Climate Data Base undated 8 25 Using Crop ET in Irrigation Scheduling 1991 8 26 Using ETo in Irrigation Scheduling and Crop Modeling 1997 8 27 A Water and Climate Atlas for Water Resource Development, with Donald T. Jensen undated 9 1 The Water Balance and Irrigation Management in the Arab Countries 1982 9 2 The Water Balance and Stream Flow Typical Areas in Honduras undated 9 3 A Water Balance Study of the Patuca Basin 1998 14 8 Water Balance Synthesis for Irrigated Areas, with K. Ethirajan and Ken Vogler undated 9 4 Water Requirements and Man-Induced Climate Change 1981 9 5 Water Requirements, Droughts, and Extreme Rainfall Manual for the United States, with Zohrab A. Samani 1985 9 6 Water Requirements for Increased Arid Land Productivity undated 9 7 Water Requirements Manual for Irrigated Crops and Rainfed Agriculture 1975 9 8 Water Requirements of Turf Grasses undated 9 9 Water Resource Development in the 21st Century undated 9 10 Water Resource Development Planning with Limited Data, with Eric Olsen 1998 14 9 The Water Resources of the Sula Basin undated 14 10 A World Surface Water Atlas 1997 9 11 World Water for Agriculture (Climate, Precipitation Probabilities and Adequacies for Rainfed Agriculture) undated 9 12 World-wide Estimation of Potential Evapotranspiration undated 9 13 Zonificacion Agroclimatica Para Honduras 1990 9 14 Publications by date, chronologically Economic Commission for Asia and the Far East... Report 1957 11 1 Consumptive Computations from Evaporation Pan Data 1966 11 2 Evapotranspiration and the Water Balance for the UNDP Groundwater Project Nicaragua 1971 11 3 Monthly Precipitation Probabilities for the States... in Northeast Brazil 1973 11 4 Disponibilidades e Deficiencias de Umidade... Brasil 1973 Portuguese. 11 5 Precipitation Dependability and Potentials for Agricultural Production in Northeast Brazil 1974 11 6 Manual de Requerimento de Agua 1976 11 7 Length of Record and Reliability of Precipitation Means and Probabilities 1977 11 8 Improvement of Small Farm Irrigation in the Republic of Honduras 1977 11 9 Monthly Precipitation Probabilities, climate... for Nicaragua 1978 11 10 Moisture Precipitation Probabilities... for Peru 1978 English, Spanish; Castilian. 11 11 Dependable Rainfall and irrigation and Drainage Requirements for Nicaragua 1979 11 12 Monthly Precipitation Probabilities for Moisture Availability for Honduras 1980 12 1 A Crop Water Evaluation Manual for India 1983 12 2 Manual de Programacion del Riego Version Parcial para Apoyo Didactico 1985 Spanish; Castilian. 12 4 Water Requirements and the Water Balance for India 1984 12 3 Manual de Programacion del Riego Traduccion de "Irrigation Scheduling Manual" 1985 Spanish; Castilian. 12 5 A Crop Water Evaluation Manual for India 1985 12 6 Rainfall Probabilities and Agricultural Water Requirements for selected Asian and Pacific Countries 1986 English. 12 7 Manual de Programacion de Riego 1987 12 8 Manual for Dryland and Irrigated Crop Production: Appendix I Monthly Climatic Data Tables for Africa 1988 1988 12 9 Guidelines for Improved Irrigation Planning for Honduras 1990 12 10 Irrigation Scheduling Programacion del Reigo 1991 English, Spanish; Castilian. 12 11 Agroclimatic Information for Irrigated Crop Production 1991 13 1 Manual de campo Para Estudios de Reconocimiento 1991 Spanish; Castilian. 13 2 Programacion del Riego 1991 Spanish; Castilian. 13 3 A Climatic Data Base for Honduran Water Resources Development 1991 13 4 Irrigation Scheduling 1991 13 5 Evaluacion Final del Proyecto Desarrollo de Riego Proriego 1993 Spanish; Castilian. 13 6 My 40 Years of Foreign Development Assistance 1995 13 7 Fundamentos de Riego undated Spanish; Castilian. 13 8 Crop Yield: Economic Considerations of Deficit Irrigation undated 13 9 La Canicula en El Salvador Undated Spanish; Castilian. 13 10 Groundwater Resources for Agricultural Development in El Salvador/ Executive Summary undated 13 11 Resumen Ejectivo Recursos de Aguas Subterraneas para... El Salvador undated 13 12 Irrigation and Drainage in Harmony with the Environment undated 13 13 A Data Base for Crop Planning for Africa undated 13 14 Clima y Evapotranspiracion Potencial para Ecuador undated Spanish; Castilian. 13 15 Manual para Produccion de Cultivos en Secano y Bajo Riego undated Spanish; Castilian. 13 16