A MULTICROP PRODUCTION MODEL OF IRRIGATED AGRICULTURE, APPLIED TO WATER ALLOCATION POLICY OF THE BUREAU OF RECLAMATION

Recipients of irrigation water from the Bureau of Reclamation (BuRec) face a future of water conservation. By formally modeling surface water as a fixed, allocatable input to a multioutput firm, this research captures the institutional constraints governing water allocation and , simultaneously, establishes a cohesive approach to analyzing the production effects of BuRec allocation policy. Econometric results show that BuRec-served irrigators'Â’ crop supply and land allocation decisions are generally inelastic with respect to the water constraint. Using the elasticities, a policy simulation of a 10% reduction in BuRec water allocation indicates that production response to reduced water supply would affect the national price of three of ten major crops produced by BuRec-served farms.Resource /Energy Economics and Policy,

The Marine and Brackish Water Mollusca of the State of Mississippi

The study of marine life of the Gulf of Mexico has progressed slowly as compared to other regions of the United States. Much of this lack of progress is probably due to the absence of universities in the coastal area, and the absence of large populated centers where marine research would be encouraged. The early work was done by travelers and expeditions from places remote to the Gulf. Only in the present century has there been any attempt to establish marine laboratories on this seaside. Most of these laboratories have been located in rather remote, inaccessible places, and have usually suffered from inattention by the parent institution. In recent years, however, the search for oil, industrial growth of coastal cities, and the development of beach resorts have brought new roads and more people to the coast. During the same time the Gulf fishing industry expanded enormously, and, in value, became the largest fishery of the several important fishing regions of the United States. For instance, according to Fisheries Industries of the United States for 1956, the Gulf coast produced more in pounds and value than the Pacific coast, and more in value than the New England states. This new growth has stimulated a demand for more scientific knowledge of the Gulf and its waters. The scientific study of the Mollusca of the Gulf of Mexico has been carried on in the past in museums far from this region. The bulk of this work has dealt mainly with taxonomy, and even the geographical distribution of most species is poorly known. The writer’s purpose in the present work is to give a brief history of prior work on Mollusca along the Mississippi coast, to identify the species found in the area studied, and to discuss what is known of the distribution, abundance, and habits of many of the species. The work was done at the Gulf Coast Research Laboratory in Ocean Springs, Mississippi, and was carried on concurrently while the writer was engaged in other duties and activities. Most of the specimens were collected near the Laboratory or around Horn and Ship Islands, but both ends of Mississippi Sound received attention, and it is believed that the collections are representative of the entire area. The writer did not attempt to work in fresh water, and limited the marine collections to the area inside a line drawn one mile south of the barrier islands

The Marine and Brackish Water Mollusca of the State of Mississippi

The study of marine life of the Gulf of Mexico has progressed slowly as compared to other regions of the United States. Much of this lack of progress is probably due to the absence of universities in the coastal area, and the absence of large populated centers where marine research would be encouraged. The early work was done by travelers and expeditions from places remote to the Gulf. Only in the present century has there been any attempt to establish marine laboratories on this seaside. Most of these laboratories have been located in rather remote, inaccessible places, and have usually suffered from inattention by the parent institution. In recent years, however, the search for oil, industrial growth of coastal cities, and the development of beach resorts have brought new roads and more people to the coast. During the same time the Gulf fishing industry expanded enormously, and, in value, became the largest fishery of the several important fishing regions of the United States. For instance, according to Fisheries Industries of the United States for 1956, the Gulf coast produced more in pounds and value than the Pacific coast, and more in value than the New England states. This new growth has stimulated a demand for more scientific knowledge of the Gulf and its waters. The scientific study of the Mollusca of the Gulf of Mexico has been carried on in the past in museums far from this region. The bulk of this work has dealt mainly with taxonomy, and even the geographical distribution of most species is poorly known. The writer’s purpose in the present work is to give a brief history of prior work on Mollusca along the Mississippi coast, to identify the species found in the area studied, and to discuss what is known of the distribution, abundance, and habits of many of the species. The work was done at the Gulf Coast Research Laboratory in Ocean Springs, Mississippi, and was carried on concurrently while the writer was engaged in other duties and activities. Most of the specimens were collected near the Laboratory or around Horn and Ship Islands, but both ends of Mississippi Sound received attention, and it is believed that the collections are representative of the entire area. The writer did not attempt to work in fresh water, and limited the marine collections to the area inside a line drawn one mile south of the barrier islands

Corn Harvesting Handling Marketing in Ohio

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Experimental evaluation of two turning vane designs for fan drive corner of 0.1-scale model of NASA Lewis Research Center's proposed altitude wind tunnel

Two turning vane designs were experimentally evaluated for corner 2 of a 0.1 scale model of the NASA Lewis Research Center's proposed Altitude Wind Tunnel (AWT). Corner 2 contained a simulated shaft fairing for a fan drive system to be located downstream of the corner. The corner was tested with a bellmouth inlet followed by a 0.1 scale model of the crossleg diffuser designed to connect corners 1 and 2 of the AWT. Vane A was a controlled-diffusion airfoil shape; vane B was a circular-arc airfoil shape. The A vanes were tested in several arrangements which included the resetting of the vane angle by -5 degrees or the removal of the outer vane. The lowest total pressure loss for vane A configuration was obtained at the negative reset angle. The loss coefficient increased slightly with the Mach number, ranging from 0.165 to 0.175 with a loss coefficient of 0.170 at the inlet design Mach number of 0.24. Removal of the outer vane did not alter the loss. Vane B loss coefficients were essentially the same as those for the reset vane A configurations. The crossleg diffuser loss coefficient was 0.018 at the inlet design Mach number of 0.33

A Commensal Relationship Between a Foraminifer and a Bivalve Mollusk

During June, 1960, the M/V Hermes of the Gulf Coast Research Laboratory made several trawl hauls south of Horn Island, Mississippi. One haul was made June 27 at a depth of 20 m. on sandy mud botton at 30°04’30” N., 88”36’ W., or about 10 nautical miles south of Horn Island. A considerable number of animals, including starfish, hermit crabs and tube worms, were caught in the trawl. Pieces of the parchment-like worm tube of Chaetopterus variopedatus (Renier) were caught in the meshes of the net and were also collected. A small bivalve mollusk, Notocorbula operculata (Philippi 1848) was found to be attached to most of the Chaetopterus tubes. Microscopic examination showed that the bivalves were attached at the anterior ventral margin with a byssal thread. This little clam has been found under similar conditions at Dry Tortugas, Florida (Harvey R. Bullis, Jr., personal communication). It has been reported as abundant in 22-65 m. of water on mud bottom along the entire northern coast of the Gulf of Mexico (Parker 1960). It was also noticed that a single species of Foraminifera was attached to many of the clams. The attachment was not very strong, seeming to consist merely of a weak cement holding the ventral surface of the foraminifer to the bivalve shell, nor was it confined to a particular area on the bivalve, but occurred in any position on either valve

A Commensal Relationship Between a Foraminifer and a Bivalve Mollusk

During June, 1960, the M/V Hermes of the Gulf Coast Research Laboratory made several trawl hauls south of Horn Island, Mississippi. One haul was made June 27 at a depth of 20 m. on sandy mud botton at 30°04’30” N., 88”36’ W., or about 10 nautical miles south of Horn Island. A considerable number of animals, including starfish, hermit crabs and tube worms, were caught in the trawl. Pieces of the parchment-like worm tube of Chaetopterus variopedatus (Renier) were caught in the meshes of the net and were also collected. A small bivalve mollusk, Notocorbula operculata (Philippi 1848) was found to be attached to most of the Chaetopterus tubes. Microscopic examination showed that the bivalves were attached at the anterior ventral margin with a byssal thread. This little clam has been found under similar conditions at Dry Tortugas, Florida (Harvey R. Bullis, Jr., personal communication). It has been reported as abundant in 22-65 m. of water on mud bottom along the entire northern coast of the Gulf of Mexico (Parker 1960). It was also noticed that a single species of Foraminifera was attached to many of the clams. The attachment was not very strong, seeming to consist merely of a weak cement holding the ventral surface of the foraminifer to the bivalve shell, nor was it confined to a particular area on the bivalve, but occurred in any position on either valve