Productivity and Efficiency

According to the U.S. Environmental Protection Agency, water efficiency is the smart use of our water resources through water-saving technologies and simple steps. Using water efficiently will help ensure reliable water supplies today and for future generations. Topics addressed in this theme provide insights, lessons, and guidance on how diverse stakeholders are working to improve water management and reduce water use.

Productivity and Efficiency Resources

Calibration and Application of the Jensen - Haise Evapotranspiration Equation

Published: 
January 1, 1975
U.S. Agency for International DevelopmentColorado State University
TO ESTIMATE THE CONSUMPTION USE OF VARIOUS CROPS USING CLIMATIC DATA, A SUMMARY OF THE PROCEDURE FOR DETERMINING EVAPOTRANSPIRATION AFTER CALIBRATING THE JENSEN-HAISE EQUATION IS AS FOLLOWS: 1) DETERMINE MEAN DAILY TEMPERATURE (T) FROM DAILY MAXIMUM AND MINIMUM TEMPERATURES FOR THE SEASON AND...Read more
Regional focus: 
United StatesNorth America

Optimum Utilization of Water for Agriculture, With Emphasis on On-Farm Water Management; Annual Technical Report, 1974/1975

Published: 
January 1, 1975
U.S. Agency for International Development
The report details findings on optimum utilization of water for agriculture, finding evidence that in developing countries there is an urgent need for more food and better nutrition. Food production is closely linked to the water available for transpiration by the growing crop and the water...Read more
Regional focus: 
United StatesNorth America

Effects of Waterhyacinth Cover on Water Chemistry, Phytoplankton, and Fish in Ponds

Published: 
January 1, 1975
U.S. Agency for International Development
Water hyacinth (Eichhornia crassipes (Mort.) Solms) cover of 0, 5, 10, or 25% surface was established in fertilized ponds stocked with the fish, Tilapia aurea (Steindachner), at Auburn, Alabama. Measurements of water chemistry, phytoplankton density, and fish production were made during the 1973...Read more
Regional focus: 
United StatesNorth America

Aspects of the Colombian Fisheries Development Loan

Published: 
January 1, 1975
U.S. Agency for International Development
This Auburn University report on aid to the development of a fisheries program in Colombia discusses four major areas: construction of the Repelon Aquaculture Station, Research Station site selection in the Alto Magdalena, development of an aquacultural research plan, and the establishment of a...Read more
Regional focus: 
United StatesNorth America

Catfish Are Not the Only Fish in the Pond

Published: 
January 1, 1975
U.S. Agency for International Development
MANY OTHER TYPES OF FISH OF EXCELLENT EATING QUALITY HAVE MUCH LOWER FEED AND WATER QUALITY REQUIREMENTS THAN DO CATFISH, AND REQUIRE MUCH LOWER LEVELS OF CAPITAL AND MANAGEMENT. CATFISH DO NOT UTILIZE FEED EFFICIENTLY WHEN THE WATER TEMPERATURE IS BELOW 60 DEGREES F., AND THE TOTAL NUTRIENTS...Read more

Paddlewheels for Catfish Pond Aeration

Published: 
January 1, 1975
U.S. Agency for International Development
A combination of warm weather and cloudy days in late summer can result in low oxygen levels in fed catfish ponds. Several types of mechanical aerators are being used to maintain an adequate dissolved oxygen level in the ponds. These include air blowers, submerged pumps, and propellers. New...Read more

The Role of Fisheries: Aquaculture in Latin America

Published: 
January 1, 1975
U.S. Agency for International Development
This trip report of a three-week visit to Brazil, Panama, El Salvador, and Guatemala describes the state-of-the-art of Latin American fisheries. Part I contains recommendations for AID., part ii discusses the Brazilian situation, and part iii presents the situation in central America...Read more
Regional focus: 
Latin America and the Caribbean

Hatchery Propagation of the Black Basses

Published: 
January 1, 1975
U.S. Agency for International Development
THE MOST PRACTICAL METHOD OF MASS-PRODUCING BASS FINGERLINGS UP TO A TOTAL LENGTH OF 4 INCHES (10 CM) IS TO STOCK SMALL BASS OF AN APPROPRIATE SIZE INTO PREPARED REARING PONDS AT A DENSITY GOVERNED BY THE SIZE BEING REARED. FRY CAN BE PRODUCED IN A SPAWNING POND UNDER THE CARE OF THE PARENT FISH OR...Read more

Ecosystems Modeling: Economic Considerations for a Peruvian Coastal Fishery; A.I.D. Technical Services Project

Published: 
January 1, 1975
U.S. Agency for International Development
MECHANISTIC SIMULATION MODELS OF ECOLOGICAL PROCESSES ARE BECOMING USEFUL TOOLS FOR THE STUDY AND MANAGEMENT OF COMPLEX NATURAL SYSTEMS SUCH AS UPSWELLING COASTAL REGIONS. THE GOAL OF THIS COOPERATIVE PROJECT WAS TO DEVELOP SUCH A MODEL, WHICH WOULD PROVIDE WORKING EXPERIENCE WITH THE METHODS AND...Read more

Artisanal Fisheries in Panama

Published: 
January 1, 1975
U.S. Agency for International Development
A DESCRIPTION OF PERTINENT CHARACTERISTICS OF SELECTED CONCENTRATIONS OF ARTISANAL FISHERMEN IN PANAMA. THEY RANGE FROM GROUPS OF UNORGANIZED INDIVIDUALISTIC FISHERMEN TO HIGHLY ORGANIZED FISHING COOPERATIVES. THE EQUIPMENT USED EXTENDS FROM MOTORLESS DUGOUT CANOES AND HANDLINES TO MOTORIZED...Read more

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