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Articles 10741 - 10770 of 11977
Full-Text Articles in Physical Sciences and Mathematics
Atlas Illustrating The Characteristics Of Groundwater In Nebraska, Vince Dreeszen
Atlas Illustrating The Characteristics Of Groundwater In Nebraska, Vince Dreeszen
Conservation and Survey Division
No abstract provided.
Airborne Thermal Mapping Of A "Flow-Through" Lake In The Nebraska Sandhills, Donald Rundquist, Gene Murray, Lloyd Queen
Airborne Thermal Mapping Of A "Flow-Through" Lake In The Nebraska Sandhills, Donald Rundquist, Gene Murray, Lloyd Queen
Conservation and Survey Division
No abstract provided.
Annual Outflow Of Water From Nebraska, 1950-1984, Conservation Survey Division
Annual Outflow Of Water From Nebraska, 1950-1984, Conservation Survey Division
Conservation and Survey Division
No abstract provided.
Significant Rises And Declines In Nebraska Groundwater Levels (From Pre-Development As Of Fall 1984)/Registered Irrigation Wells In Nebraska (As Of January 1, 1985, Conservation Survey Division, U.S. Geological Survey
Significant Rises And Declines In Nebraska Groundwater Levels (From Pre-Development As Of Fall 1984)/Registered Irrigation Wells In Nebraska (As Of January 1, 1985, Conservation Survey Division, U.S. Geological Survey
Conservation and Survey Division
No abstract provided.
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Journal of the Arkansas Academy of Science
Soil characteristics of the mineral surface soil (0-6 cm) on three small watersheds in the Ouachita Mountains of Arkansas from which the pine forests have been clearcut, crushed, and burned for site preparation were studied for the first two years following clearcutting and compared to soils from adjacent uncut pine forest watersheds. Following clearcutting and burning, soil pH was generally higher than in uncut forest soils. The greatest pH differences occurred within several months of burning and generally decreased through the end of the second year. Soil organic matter content was lower immediately following clearcutting and burning and increased to …
Using Urea Nitrogen As A Fertilizer, Kenneth L. Wells
Using Urea Nitrogen As A Fertilizer, Kenneth L. Wells
Soil Science News and Views
Solid granular or prilled urea (45-46% N) has become widely available in Kentucky, as has 28% nitrogen solution (UAN solution) which is half urea and half ammonium nitrate. When applied to a field, urea is transformed to ammonium N soon after application. The rate of transformation is greatly increased by urease, the enzyme found to varying degrees in soil and on plants and plant residues. Due to the chemical reactions involved as urea nitrogen undergoes transformation, there is some degree of likelihood for volatilization loss of some N. Whether such a loss will occur, and how much N will be …
B805: Field Appraisal Of Resource Management Systems: Crop Yield And Quality Relationships With Soil Erosion—1981, Paul R. Hepler, Lauren H. Long, Kenneth J. Laflamme, John H. Wenderoth
B805: Field Appraisal Of Resource Management Systems: Crop Yield And Quality Relationships With Soil Erosion—1981, Paul R. Hepler, Lauren H. Long, Kenneth J. Laflamme, John H. Wenderoth
Bulletins
This document presents objectives and results of the Field Appraisal of Resource Management Systems (FARMS) study'S second year. The principal objectives of FARMS were to study the relationship of crop yields to soil erosion and to simulate the economic nature of this relationship. Crop management, soils, conservation practices and management, crop yields, soil chemistry, and sociological data were collected from 800 plots in 1981. This report presents statistics for rill and sheet soil erosion, which are estimated by the Universal Soil Loss Equation (USLE) and assumed to represent a long-term rather than short-term effect. The report also presents summary statistics …
Geology Of Ponca State Park, Nebraska, Roger K. Pabian, Dennis R. Lawton
Geology Of Ponca State Park, Nebraska, Roger K. Pabian, Dennis R. Lawton
Conservation and Survey Division
No abstract provided.
Effectiveness Of Liming Materials, Monroe Rasnake
Effectiveness Of Liming Materials, Monroe Rasnake
Soil Science News and Views
A number of different sources of liming materials are available to Kentucky farmers and homeowners. The best one for any particular use depends on several factors:
- Size of area being treated
- How quickly the reaction is needed
- Method of application
- Cost of the material
- Quality (neutralizing value) of the material
Following is an evaluation of some liming materials based on those factors.
Fertilizing Alfalfa For Optimum Yields, William O. Thom
Fertilizing Alfalfa For Optimum Yields, William O. Thom
Soil Science News and Views
Alfalfa is one of the most important forage crops in Kentucky. It is grown on a wide range of soil types, has the ability to produce high yields, and will respond to good management including a sound soil fertility program.
Plant Available Water And Plant Water Stress, Ronald E. Phillips
Plant Available Water And Plant Water Stress, Ronald E. Phillips
Soil Science News and Views
The 1983 growing season in Kentucky was a vivid reminder that water is essential for good plant growth. And the water used by plants is taken from the reserve or water stored in soil.
Developing A Fertilizer Program For Tobacco, J. L. Sims
Developing A Fertilizer Program For Tobacco, J. L. Sims
Soil Science News and Views
Use of adequate amounts of required fertilizer nutrients are necessary to increase both yield and quality of tobacco if they are lacking in a soil. However, to insure maximum profits from the tobacco crop, careful consideration must be given to fertilizer management (kinds, rates, and methods and times of fertilizer application), the chemical and physical characteristics of the soil, and the crops grown in rotation with tobacco. To develop a profitable fertilization program for tobacco requires thoughtful planning on the part of the grower. Late summer and early fall is a good time to make these plans for the future.
Soil Testing: Improving Reliability, John H. Grove
Soil Testing: Improving Reliability, John H. Grove
Soil Science News and Views
Late summer is a good time to check forage and row crop fields for possible nutritional problems and to make plans for fall soil sampling. "Problem" areas can be identified for selective sampling and the test results can be used to plan fertilizer and lime expenses for the next crop production season. Fields scheduled for tobacco, small grain and/or double cropping need to be sampled first in order to determine lime, phosphorus (P) and potassium (K) needs before fall application.
A Study Of Alternative Sites For Equestrian/Hobby Farm Development In The Karratha Area, Bernard Kok
A Study Of Alternative Sites For Equestrian/Hobby Farm Development In The Karratha Area, Bernard Kok
Resource management technical reports
This report has been prepared in response to a request from the Shire of Roebourne to assess the land use capabilities for equestrian/hobby farm development in the Karratha area.The report comprises five parts; a brief review of the areas climate,discussion of the geological soil units and vegetation, water supply, alternative areas of development and recommendations.
Inventory Of Irrigation Water Use Box Butte County, Nebraska 1981, Dennis R. Lawton, Larry L. Teahon
Inventory Of Irrigation Water Use Box Butte County, Nebraska 1981, Dennis R. Lawton, Larry L. Teahon
Conservation and Survey Division
No abstract provided.
Sewage Sludge For Land Application, William O. Thom
Sewage Sludge For Land Application, William O. Thom
Soil Science News and Views
Sewage sludge is a product of waste water treatment plants that function as environmentally acceptable pollution control facilities. In past years most of the sludge had been landfilled, dumped at sea or buried. But environmental and economic considerations have resulted in greater interest in its application on cropland.
Groundwater Levels In Nebraska, 1983, Martin S. Johnson, Darryll T. Pederson
Groundwater Levels In Nebraska, 1983, Martin S. Johnson, Darryll T. Pederson
Conservation and Survey Division
No abstract provided.
Does Use Of Gypsum Improve Soil Structure In Kentucky?, V. P. Evangelou, Kenneth L. Wells
Does Use Of Gypsum Improve Soil Structure In Kentucky?, V. P. Evangelou, Kenneth L. Wells
Soil Science News and Views
Gypsum is sometimes recommended as a soil amendment in order to improve structure. Although this practice is often used for reclamation of sodic soils (Na+ saturated) in the western USA, it's value in improving soil structure in Kentucky is questionable. The following discussion explains way.
Weed And Feed, William W. Witt, Harold B. Rice
Weed And Feed, William W. Witt, Harold B. Rice
Soil Science News and Views
Fertilizer and herbicide combinations are often applied prior to planting, at planting, or after crop emergence, a procedure sometimes called "weed and feed". The opportunities for utilizing this system are numerous with the major advantage being saving an extra trip across the field. In order for the system to work, it must ensure that both fertilizer and herbicide are present when needed. When both the crop plant and weedy plant are at growth stages which allow for compatible applications with a single treatment, this can be highly successful. Conversely, when these two plant systems are not at compatible growth stages, …
Causes Of Soil Compaction And Ways To Minimize Them, Lloyd W. Murdock
Causes Of Soil Compaction And Ways To Minimize Them, Lloyd W. Murdock
Soil Science News and Views
In order for a soil to become compacted, two conditions must be present, pressure and a soil that will compact . Different soils have different compaction characteristics. Sandy loam soils compact most readily; however, most soils with a high percentage of sand compact easily. Silt loam soils are more resistant to compaction, but they too are easily compacted when wet. When silt loam soils are not wet, it requires high pressure to compact them. When the soil is wet, each particle is lubricated and less pressure is required to compact the soil. Clayey soils can be compacted; but, as they …
Use Of Urea For Crop Production In Kentucky, Wilbur W. Frye
Use Of Urea For Crop Production In Kentucky, Wilbur W. Frye
Soil Science News and Views
Current trends indicate that urea will become the major source of solid and liquid N fertilizer in the future. Although urea has several advantages over other N fertilizers, especially in manufacturing, transporting, and marketing, there are some potential agronomic problems that farmers should keep in mind when using urea.
A Resource Survey Of The Coastal Lands From Vlaming Head To Tantabiddi Well, West Cape Range Region, P A. Hesp, J G. Morrissey
A Resource Survey Of The Coastal Lands From Vlaming Head To Tantabiddi Well, West Cape Range Region, P A. Hesp, J G. Morrissey
Resource management technical reports
The report comprise four parts; a brief review of the area's climate, discussion of the geomorphology of the major landform units, an assessment of the potential erosion hazards of the surveyed landforms, and recommendations for development.
Cereal Crop Tolerance To Herbicides, D Bowran, R Madin, A Lindsay
Cereal Crop Tolerance To Herbicides, D Bowran, R Madin, A Lindsay
Experimental Summaries - Plant Research
The 1984 experimental programme was a continuation of that started in 1981. The programme was aimed at evaluating the major herbicides in current use for cereals as well as new herbicides against the recommended varieties at three main sites, these being Wongan Hills, Merredin and Mt Barker. In addition Stage 4 breeding lines were evaluated against the same herbicides but only at Wongan Hills. The herbicides used and their rates and time of application are presented in Table 1. Herbicides were applied at both the recommended and twice the recommended rates of application, except in the breeding line trial where …
Sources Of Phosphorus Trials. Miscellaneous Trials., J W. Bowden, R Lunt, M Baker
Sources Of Phosphorus Trials. Miscellaneous Trials., J W. Bowden, R Lunt, M Baker
Experimental Summaries - Plant Research
I Sources of phosphorus work. Pasture trials - 77MT1 - New land (1977) continuous pasture trial, gravel. 80BA6 - Ley 1984. Serradella weeds and lupin regrowth, sand. 84N069 - New land (1984) pasture, gravel. Crop trials - 76WH9 - New land (1976) run down on one dressing of P W.L.S. 76WH10 - Young land Topdressed annually, biennially and once off. 76WH14 - Old land Topdressed anually and biennially. 76N4 - New land (1976) Topdressed annually biennially and once off, gravel. 84M63 - New land (1984) Once off dressing. Trials not sampled - 77WH2 - Old land Sources trial 77MT2 - …
Studies On The Effects Of Nutrition And Tillage Systems On Cereal Root Diseases, R F. Brennan
Studies On The Effects Of Nutrition And Tillage Systems On Cereal Root Diseases, R F. Brennan
Experimental Summaries - Plant Research
1. Split Applications of Nitrogen and Take-all 84N1. 2. Split Applications of Nitrogen and Take-all 84E2. 3. Split Applications of Nitrogen and Take-all 84MT4. 4. Split Applications of Nitrogen and Take-all 84LG1. 5. Nitrogen and Phosphorus Rates and Take-all 83ES41. 6. Nitrogen and Phosphorus Rates and Take-all 83ES42. 7. Nitrogen and Phosphorus Rates and Take-all 83ES43. 8. Micronutrients (Cu, Zn) and Take-all 83ES39. 9. Micronutrients (Cu, Zn) and Take-all 83ES40. 10. Cu Residual on Wheat and Take-all 67E9. 11. Cu Residual on wheat and Take-all 67E8. 12. Take-all and Manganese/Ammonium Interaction 84LG2. 13. Take-all and Manganese/Ammonium Interaction 84MT5. 14. Take-all …
Foliar Disease Of Wheat, A. G. P. Brown
Foliar Disease Of Wheat, A. G. P. Brown
Experimental Summaries - Plant Research
Wheat leaf diseases were at much reduced levels in 1984. This may have been caused by prolonged summer rain prematurely setting off dispersal of spores and also initiating microbiological breakdown of stubble residues. No survey was carried out in 1984 but a good indication of the seasonal effect can be gained by noting that in the spray-timing experiment at Badgingarra disease levels were extremely low until the end of August some 90 days after sowing. Timing of fungicide for Septoria and Yellow Spot control. 84BA32, 84GE59. Effect of Yellow-spot at Merredin (with S. Trevenen) 84ME57. Yellow-spot is common though not …
Control Of Black Spot; Peas, Potatoes, Lettuce, Eleanor M. Carter
Control Of Black Spot; Peas, Potatoes, Lettuce, Eleanor M. Carter
Experimental Summaries - Plant Research
Please find attached summaries for all experiments completed as at February 1, 1985. Crop Trial number Title Status Peas - 84MT49 Control of black spot Completed. Potatoes - 84PE25 Varietal susceptibility - Powdery scab Completed 84MD46 Varietal susceptibility to soft rot Erwinia Completed 84PE31 Yield loss and disease damage of potatoes due to Erwinia species Aborted 84MD37, 84PE32, 84PE33: Incidence of soft rot Erwinia in potato/cauliflower rotations Completed 84MN31 Yield loss and disease damage of potatoes due to Erwinia species Continuing 84MN32 Varietal susceptibility to soft rot Erwinia Continuing 84MN33 Incidence of soft rot Erwinia in potato crops Continuing Lettuce …
Soil Acidity Survey. Lime Responses In The Central Wheatbelt, P J. Dolling
Soil Acidity Survey. Lime Responses In The Central Wheatbelt, P J. Dolling
Experimental Summaries - Plant Research
Introduction: In 1984 a project commenced to examine the influence of soil acidity on barley production in the main barley growing areas of Western Australia. To carry out some of the projects objectives a soil survey was carried out.
Aims: 1. To select nine sites for liming trials in 1985. 2. To obtain more information about the soil acidity problem in the medium rainfall region of W.A. 3. To determine if there is a relationship between the pH and aluminium content of the soil.
Survey details: Area covered - Katanning and Narrogin District Office (DO) areas. Sampling period - Mid …
The Ecology Of Skeleton Weed .(Chondrilla Juncea L.) In Western Australia , Afghan Thistle (Solanum Hoplopetalum) Ecology, J. Dodd
Experimental Summaries - Plant Research
1. The ecology of skeleton weed .(Chondrilla juncea L.) in Western Australia - 84PE18 Seed production and water use in the glasshouse. 1.2 Seed production and water use of field-grown skeleton weed (84BA17, 84BA18). Water use. 1.3 Germination in relation to soil water content. 2. Afghan thistle (Solanum hoplopetalum) ecology. 2.1 Water relations (84N048). 2.2 Growth in Afghan thistle (84N050). 2.3 Afghan thistle reproductive biology (84N049, 84N063, 84PE19).
Doublegee Seed Dormancy And Longevity, Lupins - Radish Control, Peas - Broadleaf Weed Control, D J. Gilbey, R. Klemm
Doublegee Seed Dormancy And Longevity, Lupins - Radish Control, Peas - Broadleaf Weed Control, D J. Gilbey, R. Klemm
Experimental Summaries - Plant Research
Doublegee - Seed dormancy and longevity. Doublegee seed longevity x depth – 76C9, 75KA8. Lupins - Radish control. Radish control in lupins – 84A4, 84GE54, 84ME45, 84TS35. Pre-emergence grass weed control. Pre-emergence grass control in lupins – 84BA30, 84BA33. Post-emergence grass weed control - 84A5. Simazine rates on qravel soils – 84NO61, 84NA26. Herbicide in peas – 84ME56. Peas – Broad leaf weed control. Broad leaf weed control in grain peas – 84KA30, 84ME46, 84NO64.