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Articles 37831 - 37860 of 39785
Full-Text Articles in Physical Sciences and Mathematics
Abstracts Of Contributed Papers, 94th Session, Iowa Academy Of Science, April 16-17, 1982, Iowa Academy Of Science
Abstracts Of Contributed Papers, 94th Session, Iowa Academy Of Science, April 16-17, 1982, Iowa Academy Of Science
Iowa Academy of Science Documents
Presentation abstracts from the annual meeting of the Iowa Academy of Science
The Annual Meeting Of The Iowa Academy Of Science April 16-17, 1982 [Program, 94th Meeting], Iowa Academy Of Science
The Annual Meeting Of The Iowa Academy Of Science April 16-17, 1982 [Program, 94th Meeting], Iowa Academy Of Science
Iowa Academy of Science Documents
No abstract provided.
You Can Make Money Producing And Marketing Alfalfa In The 80'S, David C. Petritz
You Can Make Money Producing And Marketing Alfalfa In The 80'S, David C. Petritz
Kentucky Alfalfa and Stored Forage Conference
We are today, as we were during most of the 70's, concerned with the future of the forage enterprise and the livestock species that depend on it. Will they survive an environment in which the emphasis is on grain exports? Will they survive in an environment in which consumers are not able (but hopefully willing) to pay prices for red meats which are profitable for all segments of the livestock industry? Will they survive in the 80's when real interest rates will be relatively high?
Marketing Alternatives For Kentucky Alfalfa: Needs, Challenges And Opportunities, J. Kenneth Evans
Marketing Alternatives For Kentucky Alfalfa: Needs, Challenges And Opportunities, J. Kenneth Evans
Kentucky Alfalfa and Stored Forage Conference
There are unquestionable needs for more high quality alfalfa in the Southeastern U.S. From these needs arise the challenge and opportunities for those who are researching, informing, teaching, and even promoting alfalfa. Likewise, there are income opportunities for those who own resources which could be used in producing and marketing alfalfa. This paper will discuss some of the factors which should be considered in hay marketing, i.e., (1) a dependable supply of hay; (2) producing high quality hay; and (3) planning to supply the highest quality hay to the highest priced market.
Hay - The National And International Traveler, Harry D. Gates Jr.
Hay - The National And International Traveler, Harry D. Gates Jr.
Kentucky Alfalfa and Stored Forage Conference
Prior to 1883, packing, shipping and hauling hay was an irregular business. There was no established custom to govern, and every transaction was typical of the parties engaged in it.
The hay crop had become the leading agricultural product in value, and its importance commercially was appreciated. The amount of hay leaving the farm had steadily increased, but trade environment did not offer much encouragement for businessmen of regular methods, or the capitalist to embark in the business, and it was apparent to every thinking person that for the proper development of so important an industry it was necessary in …
Development Of Local Hay Association, Roger Sparrow, Eric Hinton, J. H. Ragland
Development Of Local Hay Association, Roger Sparrow, Eric Hinton, J. H. Ragland
Kentucky Alfalfa and Stored Forage Conference
The need for a Hay marketing "system" had been obvious to hay sellers and agricultural leaders in Larue County for some time. Five or six hay producers had been selling mainly alfalfa hay to truckers, who would transport the hay to a buyer and reap the profit. Hay was mostly sold by the bale and at a low price. Because of the land and soil type, Larue County had a good potential to produce alfalfa as a cash crop. The development of this potential was being limited by an unreliable and unprofitable market. Given these conditions, the development of a …
Alfalfa From The Consumer Standpoint, John Williams
Alfalfa From The Consumer Standpoint, John Williams
Kentucky Alfalfa and Stored Forage Conference
Traditionally, horsemen in this part of the United States have fed grass hay mixed with good red clover hay to their horses in training as well as their horses on the farm. Knowing that legume hay is high in protein, horsemen found this is a good source of the needed protein for their animals no matter what activity they were engaged in. A few problems were found with clover hay. First of all, it was usually dusty and, if not made under ideal circumstances, the hay was dark and in some cases moldy. The hay could never be purchased in …
Innovations In Hay Harvesting And Storing, V. L. Lectenberg, D. A. Holt
Innovations In Hay Harvesting And Storing, V. L. Lectenberg, D. A. Holt
Kentucky Alfalfa and Stored Forage Conference
Haymaking in the humid parts of the U.S. is the most risky operation that farmers engage in. Standing hay is extremely high in moisture and must be dried to at least 25% moisture less before it can be stored without spoilage. Most farmers rely on natural field drying processes to cure their hay. Natural drying is often slowed by high relative humidity. Rainfall frequently occurs before the hay has dried which further slows the drying process and can result in serious nutrient and yield losses. Haymaking is also a labor-intensive farming operation and, until recently, involved a large amount of …
Breaking The Alfalfa Yield Barrier, J. Paul Mueller
Breaking The Alfalfa Yield Barrier, J. Paul Mueller
Kentucky Alfalfa and Stored Forage Conference
During the past one-hundred or so years, alfalfa production has spread and flourished in the United States. It has contributed to progress in many phases of the livestock industry.
No-Till Establishement Of Alfalfa, Harlan E. White, Dale D. Wolf
No-Till Establishement Of Alfalfa, Harlan E. White, Dale D. Wolf
Kentucky Alfalfa and Stored Forage Conference
The no-till concept has been widely accepted in Virginia for corn and soybean production. However, alfalfa is still commonly established by plowing and tilling the soil into a fine seedbed. Each year many tons of productive topsoil is eroded by rainfall on those prepared seedbeds. The resulting gullies remain in the hayfield for the life of the stand to damage equipment and "rattle the teeth" of the operator.
Current Disease Problems In Alfalfa, William C. Nesmith
Current Disease Problems In Alfalfa, William C. Nesmith
Kentucky Alfalfa and Stored Forage Conference
Alfalfa is attacked by many fungi, bacteria, viruses and nematodes which USDA estimates reduces hay yields by 24% annually in the U.S. Even greater losses occur in Kentucky. However, it is the diseases of the root and crown which cause the greatest damage because they limit the number of years a stand can remain productive.
Quality Alfalfa Seed Production In The West, Vern L. Marble
Quality Alfalfa Seed Production In The West, Vern L. Marble
Kentucky Alfalfa and Stored Forage Conference
Alfalfa seed production in the western United States has become a specialized business, and can no longer be considered as a "catch crop" to be harvested along with a hay production program in historical production areas in the Plains and Rocky Mountain states which produced approximately 80 percent of all of the seed produced in the late 1940's and early 1950's. In 1981 the seven western states of California (47.8 percent), Idaho (12.2 percent), Nevada (8.7 percent), Washington (7.7 percent), Oregon (4.2 percent), Montana (4.5 percent), and Utah (3.2 percent) produced 87.5 percent of the total 1981 production of 117 …
High-Temperature Battery Calorimeter, L. D. Hansen, R. H. Hart, D. M. Chen, H. F. Gibbard
High-Temperature Battery Calorimeter, L. D. Hansen, R. H. Hart, D. M. Chen, H. F. Gibbard
Faculty Publications
A battery calorimeter was built for the measurement of thermal energy generation of high-temperature lithium–aluminum/iron sulfide battery cells, which are under development for electric vehicle propulsion and other energy storage applications. The calorimeter was designed with a temperature range of 400˚–500˚C, a detection limit of 1 mW, and an upper limit of heat flow of 50 W. The results of measurements on 200-Ah LiAl/FeS cells were in excellent agreement with the predictions of thermodynamic calculations based on precise measurements of the total cell polarization and the temperature coefficient of the emf. Details of the construction and operation principles of this …
A Comparison Of Recruitment Strategies Among Brachyuran Crustacean Megalopae Of The York River, Lower Chesapeake Bay And Adjacent Shelf Waters, David Franklin Johnson
A Comparison Of Recruitment Strategies Among Brachyuran Crustacean Megalopae Of The York River, Lower Chesapeake Bay And Adjacent Shelf Waters, David Franklin Johnson
OES Theses and Dissertations
Twenty-one stations forming a transect of the Pamunkey River, York River, lower Chesapeake Bay and adjacent coastal waters were sampled from July through September 1980. The megalopa stages of 11 brachyuran species were sampled. Vertical and horizontal distributions are described for each species in relation to salinity and water column stratification. The megalopae are assigned to three apparent recruitment strategies: retained estuarine, expelled estuarine and retained coastal megalopae. the megalopa stages of estuarine adults, such as Hexapanopeus angustifrons, Neopanope sayi, Panopeus herbstii and Pinnotheres ostreum, are retained in estuarine epibenthic waters, while Rhithropanopeus harrisii are retained in slightly shallower …
A Laboratory Study Of Nongenetic Embryonic Adaptation To Salinity And Its Subsequent Effects Upon Larval Development Of The Grass Shrimp Palaemonetes Pugio Holthius, Paul Jay Anninos
OES Theses and Dissertations
Fertilized embryos of the grass shrimp Palamonetes pugio Holthuis (Decapoda; Caridea) were exposed to two levels of salinity [5 ppt (exposed) and 20 ppt (control)] during incubation to determine the extent to which embryonic adaptation influences subsequent larval development. Larval response to embryonic exposure was measured at three salinities (5 ppt, 10 ppt, and 20 ppt) as the fraction of larvae surviving to metamorphosis and the duration (in days) of larval development. The survival rate of larvae hatched from control, or non-adapted, embryos was significantly influenced by rearing salinity. The differences in survival of pre-adapted larvae (exposed group), however, were …
Ortho Cyclization Reactions Of Catecholamines, Robert Lee Hudkins
Ortho Cyclization Reactions Of Catecholamines, Robert Lee Hudkins
Chemistry & Biochemistry Theses & Dissertations
A study was undertaken to examine the potential for ortho cyclization associated with the synthesis of 1,2,3,4,-tetrahydroisoquinolines using the Pictet-Spengler reaction. Specif1cally, the condensation of the biogenic amines, dopamine, norepinephrine and epinephrine were carefully examined in light of current literature and the facility and extent of ortho cyclization in each case. The para isomers of these three biogenic amine condensation products were isolated and characterized, while only the ortho isomer derived from dopamine was found stable and could be isolated, and structurally identified. These studies demonstrate that a second cyclization product does, in fact, form in each instance and that …
The Prairie Naturalist Volume 14, No. 1. March 1982
The Prairie Naturalist Volume 14, No. 1. March 1982
The Prairie Naturalist
LEGUME DISTRIBUTION AND NODULATION IN ARAPAHO PRAIRIE, ARTHUR COUNTY, NEBRASKA ▪ L. A. Kapustka and J. D. DuBois
BREEDING BIRDS IN TWO DRY WETLANDS IN EASTERN SOUTH DAKOTA ▪ D. E. Hubbard
RELATIVE EFFICIENCY OF THREE SMALL-MAMMAL TRAPS IN PRAIRIE WETLANDS G. W. Pendleton and R. P. Davison
WHITE PELICAN POPULATIONS AT CHASE LAKE, NORTH DAKOTA, EVALUATED BY AERIAL PHOTOGRAPHY ▪ J. G. Sidle and E. L. Ferguson
MOSQUITOES (DIPTERA:CULICIDAE) CONSUMED BY BREEDING ANATINAE IN SOUTH CENTRAL NORTH DAKOTA ▪ M. I. Meyer and G. W. Swanson
BOOK REVIEWS:
Peterson's revised field guide ▪ J. M. Andrew
Midwestern turtles ▪ …
The Aquatic Toxicity Of Organic Compounds To Embryo-Larval Stages Of Fish And Amphibians, Jeffrey A. Black, Wesley J. Birge, Willaim E. Mcdonnell, Albert G. Westerman, Barbara A. Ramey, Donald M. Bruser
The Aquatic Toxicity Of Organic Compounds To Embryo-Larval Stages Of Fish And Amphibians, Jeffrey A. Black, Wesley J. Birge, Willaim E. Mcdonnell, Albert G. Westerman, Barbara A. Ramey, Donald M. Bruser
KWRRI Research Reports
Aquatic toxicity tests were conducted on 11 organic compounds considered hazardous to water resources. The toxicity of each compound was evaluated using embryo-larval stages of two to eight fish and amphibian species. Exposure was initiated at fertilization and maintained through 4 days posthatching. The animal test species exhibited varying degrees of sensitivity to the selected toxicants. Combined frequencies for mortality and teratogenesis at 4 days posthatching gave LC50 ranges of 3.66 to 8.25 mg/L for benzene, 1.16 to 22.42 mg/L for carbon tetrachloride, 0.11 to 1.20 mg/L for chlorobenzene, 2.03 to > 68 mg/L for chloroform, 3.01 to 5.56 mg/L …
Sunlight Induced Movement Of Planktonic Organisms And Their Relationships To Water Movements, John Calkins, Ed Colley, Jay Wallingford, Carol Hulsey, Kathy Lohr, Marc Bolling
Sunlight Induced Movement Of Planktonic Organisms And Their Relationships To Water Movements, John Calkins, Ed Colley, Jay Wallingford, Carol Hulsey, Kathy Lohr, Marc Bolling
KWRRI Research Reports
Previous studies have shown the planktonic organisms of various natural water bodies to be quite sensitive to the levels of solar ultraviolet radiation incident at the water surface in summer. It has been assumed that the majority of the phytoplankton are simply carried about in the mass of the water which they inhabit with little control of their position or sunlight exposure. Photosynthetic microorganisms must strike a delicate balance with regard to solar radiation; they must obtain enough visible light for adequate photosynthesis while avoiding an excessive exposure to the injurious solar UV-B radiation.
It is proposed that the circulation …
Pasture Research At Esperance., M D A Bolland
Pasture Research At Esperance., M D A Bolland
Experimental Summaries - Plant Research
Serradella species and strain evaluation trials. Aim: There are only two strains of serradella available commercially in Australia, Ornithopus compressus, Pitman and Uniserra. There have been approximately 400 strains of the different serradella species collected by Australian scientists and their European colleagues in the Mediterranean region. The aim of these experiments was to screen a selection from this collection in an attempt to broaden the genetic diversity of serradella available commercially. Serradella germination trial. Aim: To measure per cent germination in selected strains of serradella species, with ± pods. Trifolium brachycalycinum hardseed experiment.Results of 1981 sown experiment (1982 not yet …
Nitrogenous Fertilisers For Cereals And Rape Results From 1982 Trials., M. G. Mason
Nitrogenous Fertilisers For Cereals And Rape Results From 1982 Trials., M. G. Mason
Experimental Summaries - Plant Research
Residual value of fertiliser nitrogen, Chapman research station, Nabawa, 81 C 2. Residual value of fertiliser nitrogen, Merredin research station, 81 M 1. Residual value of fertiliser nitrogen Wongan Hills research station, 81 WH 1. Evaluation of the nitrification inhibitor,DIDIN, R. Auld, North Eneabba. 82 TS 40. Evaluation of the nitrification inhibitor, DIDIN, D. Hooper, Perillup, 82 AL 35. Evaluation of the nitrification inhibitor, DIDIN, Badgingarra research station, 82 BA 9. Evaluation of the nitrification Inhibitor, DIDIN, Esperance Downs research station, Gibson, 82 E 4. Evaluation of the nitrification inhibitor, DIDIN, J.B. Wood, Lancelin, 82 MO 3. Nitrogen fertiliser requirement …
Grapevines - Herbicide Tolerance, Sorrel - Effects Of Nutrients, Bracken - Wick Application, Pennyroyal - Control, Blackberry – Control., John Moore
Experimental Summaries - Plant Research
Grapevines - Herbicide tolerance Sorrel -Effects of Nutrients Bracken- Wick application Pennyroyal - Control Blackberry - Control 82 MT 57, 82 MT 58, 82 MT 59, 81 MT 60, 80 KA 40, 80KA39, 82 AL 48, 80 AL 10, 81 AL 101,
Effect Of Herbicides On Performance Of Aerobic Dairy Lagoons, John D. Bottom, Joseph L. Taraba
Effect Of Herbicides On Performance Of Aerobic Dairy Lagoons, John D. Bottom, Joseph L. Taraba
Biosystems and Agricultural Engineering Faculty Publications
The herbicides glyphosate, bromacil, and dalapon were assessed for their affect on the oxygen uptake of microorganisms from an aerated dairy lagoon at 20 °C. The maximum recommended addition of herbicide active ingerdient to a lagoon is: glyphosate (isopropyl amino salt)—0.42 mg/L; bromacil—3.70 mg/L; and dalapon (85.8 percent Na salt and 14.2 percent Mg salt)—1.95 mg/L. In addition, microorganism isolates from the aerobic dairy lagoon were incubated under aerobic and anerobic conditions at room temperature to assess the effects of the herbicides. Under aerobic incubation, it was found that neither herbicide type nor herbicide concentration affected isolate growth. Under anaerobic …
Simulation Of Burley Tobacco Harvesting-Housing Systems, Ronald L. Bingner, Larry G. Wells, Thomas C. Bridges, George A. Duncan
Simulation Of Burley Tobacco Harvesting-Housing Systems, Ronald L. Bingner, Larry G. Wells, Thomas C. Bridges, George A. Duncan
Biosystems and Agricultural Engineering Faculty Publications
A computer model has been developed using systems analysis techniques to simulate the labor and equipment aspects of harvesting burley tobacco. By varying the parameters of the model the user can determine a harvesting and housing strategy based on labor and equipment availability.
Sorrel, Dicamba Soil Residual Effects, Glean, Veldt Grass, Declared Weeds Blackberry, Pattersons Curse, Penny Royal, J Moore
Experimental Summaries - Plant Research
CONCLUSIONS This trial has confirmed the field observation that 2,4,5-T whilst giving good initial control of Pennyroyal, fails after a number of years. Round up has a far longer term effect. This can only be attributed to a more complete initial kill as both herbicides are essentially non residual. Further work needs to be conducted on Round up in combination with soil residual chemicals or multiple applications to overcome the problem of reinfestation from seed reserves. 81A1 -01
Summary Of Experimental Results 1982., M J. Barbetti
Summary Of Experimental Results 1982., M J. Barbetti
Experimental Summaries - Plant Research
Cercospora disease of sub-clover fungicidal control of cercospora disease on sub-clover. 82M04, 82M05. Aim: To determine the efficacy of several fungicides in controlling Cercospora disease of subterranean clover. 82AL19, 82BU2. Aim: To test the effectiveness of various seed treatments for controlling seed-borne and soil-borne damping-off and root rot causing fungi so as to allow successful stand establishment in root rot affected areas. Rapeseed, yield losses from white leaf spot. 82MT4. Aim: To determine the yield losses from white leaf spot and grey stem (Pseudocercosporella capsellae) on a range of rapeseed varieties.Rapeseed effect of fungicides on white leaf spot of rapeseed. …
Foliar Diseases Of Wheat., A. G.P. Brown
Foliar Diseases Of Wheat., A. G.P. Brown
Experimental Summaries - Plant Research
Leaf diseases in the wheatbelt. Fungicides to control Septoria nodorum. Fungicide rate. Fungicides on yellow spot. Effect of stubble residues on septoria. Septoria: economic control on farm crops. 82Ba38 82BA37
Medic Inoculation Experiments., D. L. Chatel
Medic Inoculation Experiments., D. L. Chatel
Experimental Summaries - Plant Research
Inoculation trials conducted at Merredin Research Station and Merredin Research Station lease block. 1. To test the field effectiveness of promising strains of Rhizobium meliloti and to compare them with standard strains. 2. To examine the performance in subsequent years of R. meliloti as colonizers of acid soils. The new strains included in this experiment represent promising isolates from acid soils in Sardinia. Their ability to persist will be determined by second and third year nodulation assessments. 3. To compare the performance of Medicago murex with previously used medic hosts under acid conditions. 4. To assess the effect of lime …
Seed Ecology Of Weeds. Control Of Calotropis And Parkinsonia. Calotropis/Buffel Grass Interactions., A H. Cheam
Seed Ecology Of Weeds. Control Of Calotropis And Parkinsonia. Calotropis/Buffel Grass Interactions., A H. Cheam
Experimental Summaries - Plant Research
Emergence of weed seedlings from different soil depths, 82 MT 49, 82 NR 12, 82 c 37. Longevity of buried weed seeds, 82 MT 50, 82 NR 13, 82 c 38. Emergence of weed seedlings in relation to soil type and cultivation. Date of planting study with selected weed species. Chemical control of calotropis, 81 KU 2, 81 KU 3. Chemical control of Parkinsonia, 81 PH 2, 81 PH 3.
Low Rainfall Pasture Project., M. Ewing
Low Rainfall Pasture Project., M. Ewing
Experimental Summaries - Plant Research
1. Variety Trials - large plots: 82ME47, 82ME48, 82ME49, 82ME50, 82ME51, 82M27, 82N044, 82N31, 82TS27, 82LG32, 82TS32 2. Variety Tests – rows: 82M40, 82M44, 82M45, 82M49, 82M59, 82ME77. 3. Pasture Establishment and Re-establishment: 82M41, 82M42. 4. Lupins - Rates of P. 82ME64.