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Articles 57121 - 57150 of 59538
Full-Text Articles in Entire DC Network
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westernman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westernman
Memorandum
No abstract provided.
Respiratory Metabolism Of Utah Chub (Gila Atraria), R. H. Kramer, P. K. Rajagopal
Respiratory Metabolism Of Utah Chub (Gila Atraria), R. H. Kramer, P. K. Rajagopal
Memorandum
No abstract provided.
Water Uptake By Plants Under Desert Conditions, H. K. Qashu, D. D. Evans, M. L. Wheeler, Theodore Sammis
Water Uptake By Plants Under Desert Conditions, H. K. Qashu, D. D. Evans, M. L. Wheeler, Theodore Sammis
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, David F. Balph
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Memorandum
No abstract provided.
Terrestrial Models: Introduction And Main Programs, D. W. Goodall, C. Gist
Terrestrial Models: Introduction And Main Programs, D. W. Goodall, C. Gist
Memorandum
No abstract provided.
Terrestrial Models: Plant Processes (Version I, Ii, Iii), W. Valentine
Terrestrial Models: Plant Processes (Version I, Ii, Iii), W. Valentine
Memorandum
No abstract provided.
Terrestrial Models: Animal Processes (Versions I, Ii), S. Payne
Terrestrial Models: Animal Processes (Versions I, Ii), S. Payne
Memorandum
No abstract provided.
Sensitivity Analysis, I. Noy-Meir, D. Goodall
Aquatic Models, Wayne Minshall
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, Peter L. Comanor
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, Peter L. Comanor
Memorandum
No abstract provided.
Measurements Of Carbon And Nitrogen Changes In Soil, Eugene E. Staffeldt, Kristina Bemond Vogt
Measurements Of Carbon And Nitrogen Changes In Soil, Eugene E. Staffeldt, Kristina Bemond Vogt
Memorandum
No abstract provided.
Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, Inge Dirmhirn, Frank Eaton
Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, Inge Dirmhirn, Frank Eaton
Memorandum
No abstract provided.
Diest, Food Preference And Reproductive Cycles Of Some Desert Rodents, Russell P. Balda, Clark E. Franz, O.J. Reichman, Kent M. Van De Graaff
Diest, Food Preference And Reproductive Cycles Of Some Desert Rodents, Russell P. Balda, Clark E. Franz, O.J. Reichman, Kent M. Van De Graaff
Memorandum
No abstract provided.
Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa
Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V.H. Shoemaker, K.A. Nagy, W.R. Costa
Memorandum
No abstract provided.
Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton
Chronic Toxicity Of A Copper, Cadmium And Zinc Mixture To The Fathead Minnow (Pimephales Promelas Rafinesque), John G. Eaton
United States Environmental Protection Agency: Publications
Fathead minnows were exposed to a series or concentrations of a copper, cadmium and zinc mixture during a 12.5 month chronic test in water of 200 mg 1-1 total hardness. The metal concentrations in the mixture were selected on the basis of results obtained during previous chronic exposures to each of the metals individually in the same water. Strict summation of the chronic toxicities of the metals was not indicated when they were tested in combination. Toxic effects of the mixture attributable to copper appeared to be increased, but that attributable to cadmium was reduced. The effects thought to …
Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert
Captan Toxicity To Fathead Minnows (Pimephales Promelas), Bluegills (Lepomis Macrochirus), And Brook Trout (Salvelinus Fontinalis), Roger O. Hermanutz, Leonard H. Mueller, Kenneth D. Kempfert
United States Environmental Protection Agency: Publications
The toxic effects of capt an on survival, growth, and reproduction of fathead minnows (Pimephales promelas) and on survival of bluegiIIs (Lepomis macrochirus) and brook trout (Salvelinus fontinalis) were determined in a flow-through system. In a 45-week exposure of fathead minnows, survival and growth were adversely affected at 39.5 μLg/Iiter. Adverse effects on spawning were suspected but not statisticaIly demonstrated at 39.5 and 16.5 μLg/Iiter. The maximum acceptable toxicant concentration (MATC), based on survival and growth, lies between 39.5 and 16.5 μLg/liter. The lethal threshold concentration (LTC) derived from acute exposures was 64 μLg/liter, …
Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount
Chronic Effect Of Low Ph On Fathead Minnow Survival, Growth And Reproduction, Donald I. Mount
United States Environmental Protection Agency: Publications
Fathead minnows (Pimephales promelas Rafinesque) were continuously exposed to reduced pH levels of 4.5, 5.2, 5.9, 6.6 and 7.5 (control) during a 13-month, one-generation test. Survival was not affected, even at the lowest pH tested. Fish behavior was abnormal, and fish were deformed at pH 4.5 and 5.2. Egg production and egg hatchability were reduced at pH 5.9 and lower, and all eggs were abnormal. A pH of 6.6 was marginal for vital life functions, but safe for continuous exposure. Free carbon dioxide, liberated by the addition of sulfuric acid to reduce the pH, may have had an unknown …
Seismicity Preceding Moderate Earthquakes In California, Robert L. Wesson, William L. Ellsworth
Seismicity Preceding Moderate Earthquakes In California, Robert L. Wesson, William L. Ellsworth
United States Geological Survey: Staff Publications
Regional seismicity data have been examined to determine the nature of seismicity in the years preceding these moderate earthquakes in California: 1952 Kern County (M = 7.7), 1963 Watsonville (M = 5.4), 1964 and 1967 Corralitos (M = 5.0, 5.3), 1966 Parkfield-Cholame (M = 5.1, 5.5), 1968 Borrego Mountain (M = 6.4), 1969 Santa Rosa (M = 5.6, 5.7), and 1971 San Fernando (M = 6.4). In each instance the moderate earthquakes occurred in areas characterized by a relatively high level of small earthquake activity. In most cases the preceding activity in the area immediately surrounding the epicenter was high …
Time Of Planting And Rate Of Seeding On Lupin Yield, G Walton
Time Of Planting And Rate Of Seeding On Lupin Yield, G Walton
Experimental Summaries - Plant Research
Of the four time of planting trials twodefinitely showed superiority of earlier seeding (73BA5, 73E6). The two trials in the Southwest (73BR14 and 73MT7) gave highest yields with June sowing compared to May. Three trials (73BR14, 73E6 and 73BA5) appear to have a Variety x Time interaction for plant density, but no definite trend for either Uniharvest or Unicrop although later sowing reduced plant density. Seeding rates in excess of 82 kg/ha gave the highest yields in all trials. The rate of seeding experiments (73BA5 and 73MT7) show that the best crop density for yield (graph) lies between 8 and …
Summary Of 1973 Field Experiments With Advisers, M L. Poole
Summary Of 1973 Field Experiments With Advisers, M L. Poole
Experimental Summaries - Plant Research
SECTION I: Effect of times of planting x Benlate seed treatment on incidence of blackleg in Span and Zephyr rapeseed. SECTION II: Rapeseed Variety Trials 1973 including times of planting. This report provides a record of two series of trials carried out in 1973. Trials - 73A4, 73AL10, 73AL11, 73AL12, 73BR9, 73BR12, 73BR13, 73ES7, 73ES8, 73GE3, 73JE4, 73JE5, 73KA3, 73KA7, 73M2, 73MO11, 73MO13, 73MT5, 73MT6, 73NA6, 73NA7. Effect of times of planting x Benlate seed treatment on incidence of blackleg in Span and Zephyr rapeseed, series of 12 trials were set up, mainly in the southern agricultural areas, near previous …
1973 Legume Seed Inoculation, D L. Chatel
1973 Legume Seed Inoculation, D L. Chatel
Experimental Summaries - Plant Research
Lupin Experiments - Eleven trials were sown during 1973 with the aim of further examining the response of lupins to inoculation on old clover land, new to lupins, and some on new land. The lime pellet and gum slurry methods were compared. The opportunity was also taken to compare a new rhizobia, WU8, with the current commercial inoculant WU425. 1. Inoculation of Uniharvest lupins - time of sowing, strain of rhizobia and method of inoculation. Sown as second crop on old clover land - WILLIAMS. 2. Inoculation of Uniharvest lupins sown as a first crop on old clover land - …
Progress And Data February 1973, D Tennant
Progress And Data February 1973, D Tennant
Experimental Summaries - Plant Research
This report summarizes progress and data available for the following investigations. Lupin Growth Analysis, Rape Growth Analysis, Fallow Re-assessment, 72M29 Wheat Variety - Root Growth Study,
1973 Rates Of Phosphate On Lupin Yield, G Walton
1973 Rates Of Phosphate On Lupin Yield, G Walton
Experimental Summaries - Plant Research
Comments on results New land sites (Graphs 1 & 2) The three sites were very responsive with the point of inflexion about 600 kg/ha super rate (similar to 1972 result). The seed x super rate interaction shows the quicker response to super with .higher seeding rates. Low super bank (800 kg/ha) (GRAPH 3) The two sites showed very little response to super applied. On the Eradu sandplain no response to super for either Unicrop or Wheat. On the Watheroo yellow sandplain ( 73M015) the two lupin cultivers and the wheat gave different responses. High super bank ( >1 OOOkg/ha) (GRAPH …
Protection Of Our Fragile Upper Atmosphere, Clayton Clark
Protection Of Our Fragile Upper Atmosphere, Clayton Clark
Faculty Honor Lectures
Termination of U.S. government support for the Supersonic Transport, SST, may eventually cost the United States its leadership in aviation and billions of dollars in international trade losses, yet if the world wide SST program is allowed to continue, the costs to mankind as a result of damage to environmental resources could be much higher. The decision to terminate the project was heavily based upon concern for possible changes in the properties of the upper atmosphere as a result of SST operations in that realm, with consequent danger to plant and animal life on the Earth below. Briefly, the concern …
A Geochemical Study Of A Marsh Environment, Thomas F. Lytle, Julia Sever Lytle, Patrick L. Parker
A Geochemical Study Of A Marsh Environment, Thomas F. Lytle, Julia Sever Lytle, Patrick L. Parker
Gulf and Caribbean Research
The goal of this study was twofold: 1) chemically to characterize a specific salt marsh, the sediments and associated biota and 2) to establish clear relationships between the chemical substances residing in the sediments and similar or identical substances occurring in the biological specimens. In this particular study it was felt that the hydrocarbons would yield the most significant organic geochemical information. These compounds are ubiquitous but minor components of all organisms. Though their function is not entirely understood, it is known that they are concentrated in the waxy coatings of plants and most likely aid in the protective mechanisms …
1973 Lupin Cultivar Comparison, G Walton
1973 Lupin Cultivar Comparison, G Walton
Experimental Summaries - Plant Research
Comparison of lupin varieties - 73LG6, 73LG7, 73LG78, 73A15, 73BA6, 73C3, 73MT8, 73MT20, 73N3.
1973 Seasonal Results Phosphorus And Sulphur Group, J W. Bowden
1973 Seasonal Results Phosphorus And Sulphur Group, J W. Bowden
Experimental Summaries - Plant Research
Summary of 1973 Seasonal results phosphorus and sulphur group. Stocking rate x super rate Residual value of superphosphate - 1972 'Decide' Maintenance assessments PXS trials Rates of super on pasture - CSIRO/NSFP Rate/super on wheat - Sources of sulphur - Gyplap - Bunbury - Lake Grace Lime Trials - Lake Jasper - Northcliffe
62MB9, 65N5, 65A1, 65C5, 65A166M30, 66ME3, 66NO7, 66LG1, 66NA3, 67NO5, 67NO5, 67GE2, 67NO11,68AL36, 68B1, 68BR5, 68BR6, 68B1, 68BR7, 68BU2, 68NO5, 69AL2, 69AL3, 69E6, 69WH15, 72M034, 72M042, 72NA35, 72NA39, 72N40, 72N037, 72N040, 72M043, 72N057, 72NO57, 72BA33, 73BA16, 73BY10, 73BY11, 73BY12, 73BY13, 73LG3/3A, 73MA9, 73MA10, 73MA12, 73MA13, 73MA14.
1973 Pasture Species Investigations - High Rainfall Area, D. A. Nicholas
1973 Pasture Species Investigations - High Rainfall Area, D. A. Nicholas
Experimental Summaries - Plant Research
1. Clover cultivar grazing trial - North Bannister 2. Clover cultivar grazing trial - Chowerup 3. Pasture types x stocking rate trial - Denmark Research Station 4. Low oestrogen clover cultivar trial - Mobrup 5. Stocking rate and conservation for steer beef production - Mt. Barker Research Station. 6. Perennial versus annual grass grazing trial – Manjimup Research Station. 68NA1, 701BR15, 72D1, 68BR27, 71MTT46, 72MN5,
1973_Pasture Species Investigations - Wheatbelt, N. R. Mckeown
1973_Pasture Species Investigations - Wheatbelt, N. R. Mckeown
Experimental Summaries - Plant Research
Results from trials comparing the growth and persistence of a number of annual pasture legumes in 1973 are presented in this report. Rainfall conditions during the year are described briefly and a table of annual and growing season rainfall at relevant centres is appended. The experiments are grouped as follows according to average annual rainfall:- Zone A - Average annual rainfall 400 mm. Zone B - Average annual rainfall 345 - 400 mm. Zone C - Average annual rainfall 345 mm. and then further on soil type. 70GE4, 70ME3, 70ME4, 70NA3, 70TS2, 70TS5, 71LG16, 71TS22, 72LG3, 72LG26,