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

Tubewell Irrigation in the Punjab

Published: 
January 1, 1970
U.S. Agency for International Development
the purpose of this paper is to estimate the time required to irrigate an acre of land with varying tube well installations in India. This is done by estimating the brake horsepower required by various tube well installation under varying conditions of soil seepage, varying size of pipes and...Read more
Regional focus: 
IndiaSouth East Asia

Fishculture Survey Report for Peru

Published: 
January 1, 1970
U.S. Agency for International Development
A survey of fisheries in Peru during May 22 to June 6, 1970. The visit, under the sponsorship of USAID and Peru, was for the purpose of providing technical advice to the development inland fisheries.Read more
Regional focus: 
PeruLatin America and the Caribbean

Inland Fisheries Program of Thailand

Published: 
January 1, 1970
U.S. Agency for International Development
Recommendations for an expanded program of fisheries development in Thailand are based upon conferences held with personnel of the Thai department of Fisheries and USAID. Observations were made during visits to provide recommendations while addressing stocks of fish and the species which are most...Read more
Regional focus: 
ThailandEast Asia and Pacific

Prospects of the World's Fishery Resources With Emphasis on the Western Hemisphere

Published: 
January 1, 1970
U.S. Agency for International Development
The world's production from the aquatic environment, excluding whales, was doubled in the decade between 1952 and 1962, from 22 million metric tons to 45 million metric tons and in the period from 1962 to the present, from 45 million metric tons to about 70 million metric tons. The most rapid...Read more
Regional focus: 
United StatesNorth America

Food Habits and Feeding Chronology of Channel Catfish, Ictalurus Punctatus (Rafinesque) in Conowingo Reservoir

Published: 
January 1, 1970
U.S. Agency for International Development
The single 24-hour feeding chronology study indicated that subadult and adult catfish fed heavily during the daylight hours although some feeding also occurred in the night. The major foods eaten by subadults and adults differed over the 24-hour period. Fishes formed the hulk of the diet at 0600...Read more
Regional focus: 
United StatesNorth America

Alkalinity, Hardness, and Productivity of Lined Ponds

Published: 
January 1, 1970
U.S. Agency for International Development
THE APPLICATION OF 1120 KILOGRAMS OF BASIC SLAG PER HECTARE (HA) RAISED THE CONCENTRATIONS OF CALCIUM, MAGNESIUM, CARBONATES, AND BICARBONATES, DEPRESSED CARBON DIOXIDE TENSION, AND ELEVATED PH, BUT SIGNIFICANT TREATMENT EFFECTS IN THE PHOTIC ZONE WERE SOMETIMES MASKED BY THE DIEL EFFECTS OF...Read more

Computerized Hydrologic Data Acquisition System, a Facility for Upgrading Instruction in Watershed Management

Published: 
January 1, 1970
U.S. Agency for International Development
Technological explosion, population expansion, urban sprawl, changing patterns of land and water use and increasing emphasis on environmental quality control are presenting vast new challenges to natural resource scientists and land managers. These scientists and managers need an understanding of...Read more

Irrigation Requirements from Evaporation and Climatic Data

Published: 
January 1, 1970
U.S. Agency for International Development
Evapotranspiration data are available from lysimeters, field plot sampling and other methods for a variety of crops at various locations. At a given location there is frequently considerable spread or scatter in the data. This paper presents formulas and methodology for estimating evaporation...Read more

Observations on Spawning and Growth of Four Species of Basses (Micropterus) in Ponds

Published: 
January 1, 1970
U.S. Agency for International Development
Brood stock of bass were obtained from the following locations during March to April 1969: Micropterus coosae (Alabama race), Alabama River system; M. coosae (Apalachicola rate), Apalachicola River system; M. notius, Suwannee River system; M. Punctulatus henshalli, Tallapoosa River system; M. p...Read more

Agriculture Development: Fisheries.

Published: 
December 1, 1969
U.S. Agency for International Development
This USAID aquaculture project report provides updates on activities related to an aquaculture production project. It includes an implementation schedule and output production figures.Read more
Regional focus: 
LaosEast Asia and Pacific

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