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

Water Management in Philippine Irrigation Systems, Research and Operations

Published: 
January 1, 1973
U.S. Agency for International Development
PRESENTS 18 PAPERS READ AT THE WATER MANAGEMENT WORKSHOP HELD IN DECEMBER, 1972, BY THE UNIVERSITY OF THE PHILIPPINES AND THE INTERNATIONAL RICE RESEARCH INSTITUTE. THEY DEAL WITH SOIL-PLANT-WATER RELATIONSHIPS, SYSTEM AND PILOT PROJECT OPERATIONS, TECHNICAL PROBLEMS, ECONOMIC PROBLEMS, AND THE...Read more
Regional focus: 
PhilippinesEast Asia and Pacific

Freshwater Fish Pond Culture and Management

Published: 
January 1, 1973
U.S. Agency for International Development
A brief but thorough discussion of potential fish protein concentrate (FPC) and projections of its future harvest, accompanied by several illustrative tables. FDC ideally is that product resulting from modern technologies which has been transformed into a stable, dry, high amino acid quality, non-...Read more
Regional focus: 
United StatesNorth America

Management of Irrigation Systems for the Farm, an Interpretive Summary of the ADC/RTN Irrigation Seminar

Published: 
January 1, 1973
U.S. Agency for International Development
This report discusses key components for the management of on-farm irrigation systems. These include establishing systems goals and objectives, design process, inventory of the physical and social environment, implementation of the system and evaluation of the system.Read more

Sediment Routing in Irrigational Canal Systems

Published: 
January 1, 1973
U.S. Agency for International DevelopmentColorado State University
The routing of bed material load through a branching irrigation canal system in such a way as to insure sediment discharge equilibrium is considered. All the sediment entering the system is disposed of with the water. It is shown that the system equilibrium can be more easily achieved if smaller...Read more

Catfish Need Vitamin C

Published: 
January 1, 1973
U.S. Agency for International Development
Previous research indicated that only man, monkey, and gunea pig needed vitamin C in the diet. This document presents research and evidence that catfish additionally need vitamin C.Read more

Response of Intensively Fed Channel Catfish to Diets Containing Various Protein-Energy Ratios

Published: 
January 1, 1973
U.S. Agency for International Development
SIX EXPERIMENTAL CATFISH FEEDS, CONTAINING 29, 36, AND 42% CRUDE PROTEIN AT METABOLIZABLE ENERGY (ME) LEVELS OF 1000 AND 1300 KILOCALORIES (KCAL) PER LB., WERE FED TO FINGERLING CHANNEL CATFISH IN 24, 1/10-ACRE EARTHEN PONDS FOR 165 DAYS. EACH DIETARY TREATMENT WAS ASSIGNED RANDOMLY TO FOUR PONDS...Read more

Development Programs for Inland and Coastal Fisheries for Latin American Countries

Published: 
January 1, 1973
U.S. Agency for International Development
This study covers the development programs for inland and costal fisheries for Latin-American countries.Read more
Regional focus: 
Latin America and the Caribbean

Fish Population Dynamics in Tropical Waters: a Manual for Use With Programmable Calculators

Published: 
January 1, 1973
U.S. Agency for International Development
The use of sprinklers to apply irrigation water is a popular irrigation practice. Interest in using sprinkler irrigation systems continue to grow as the efficient use of water becomes important for profitable crop production. An efficient irrigation system must be capable of applying the water...Read more

Hydraulics of Trickle Irrigation Emitterlines

Published: 
January 1, 1973
U.S. Agency for International Development
A study was conducted to investigate the flushing flow characteristics of flushing emitters, the hydraulics of emitter lines under steady flow conditions, and the uniformity of distribution of emitters as influenced by emitter variations and other environmental factors. The study was composed of...Read more

Biotic Interactions Between Different Species of Algae

Published: 
January 1, 1973
U.S. Agency for International Development
Species of green algae seldom grew as well in two-species cultures with other green algae, or with blue-green algae, as when cultured alone. Several species of algae apparently excreted one or more substances into the medium which inhibited the growth of the second species. Inhibition of growth of...Read more

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