Digital Commons Network^™

Grass Control In Pastures., C W. Thorn

Experimental Summaries - Plant Research

Crop Yields after Pasture Manipulation in 1980. Effect of Grass Control on Pasture Production. Effect of Grass Control on Animal Production. Pasture Density Effects and Composition on Soil Nitrogen. The Effect of Kerb (R) on Rapeseed, Linseed and Barley Grass. 80M041, 80M040, 80AB2, 81A23, 81 A188, 81Ba2, 81 N3, 81 N2, 81 A11 81N21, 81Ka1, 81Ka2, 81 Na3, 81NO5, 81MO1

Grain Legume Agronomy Programme, G Walton

Experimental Summaries - Plant Research

Lupin agronomy, series 1 - growth factor interactions. To evaluate the relative influence that various growth factors exert on crop yield. Lupin agronomy, series 2 - harvest index response to density. To establish whether the harvest index of the plants at maximum crop yield density remains constant over a range of environmental conditions and whether differences exist between cultivars. Lupin agronomy - nutrition. To compare the grain yield response to potash rates. Grain legumes for wheatbelt rotations. To compare the soil fertility after one year growth of different legume species. In the 1981 experiments, Derrimut field pea yielded well, outyielding …

Geology And Groundwater Supplies Of Southern Dawes And Northern Sheridan Counties, Nebraska, Vernon L. Souders

Conservation and Survey Division: Faculty and Staff Publications

The upland plain in southern Dawes and northern Sheridan counties of northwest Nebraska is underlain by rocks of Tertiary age. These rocks overlie those of Cretaceous and Jurassic ages in this region of about 2250 square miles . Strata of Tertiary age are a source of groundwater for most of the irrigation, municipal, stock, and rural-domestic needs of the area.

Nine stratigraphic units of Tertiary.age were defined by examination of test hole samples and logs and by examining electric logs of oil and gas tests, driller's logs of irrigation wells, and outcrops. Stratigraphic correlations are difficult in the area because …

Annual Outflow Of Water From Nebraska, 1950-1980, Conservation Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1981

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Groundwater Reservoir Management Policy Issue Study: A Contract Report For The State Water Planning And Review Process-Nebraska Natural Resources Commission

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Fertilizer Recommendations, William O. Thom

Soil Science News and Views

Fertilizer recommendations are interpreted from a soil test value. The interpretations are based on field research that compares crop yield to soil test levels and the amount of fertilizer applied. These field studies provide data to compare relative yield of a crop for a measured soil test value and fertilizer recommendations are then calibrated to these soil test values.

Bulletin 3929 - Irrigation In Western Australia, K S. Cole

Bulletins - 3000 - 3999

Irrigation is essential in many parts of the world to produce essential food and profitable cash crops. Generally, those areas of land with less than 360 mm of rain spread over a distinct wet season of several months cannot grow crops for food or cash on rainfall alone. Then irrigation becomes necessary unless some peculiarity such as an oasis exists.

Soil Drainage---Effects On Crop Production, Kenneth L. Wells

Soil Science News and Views

One of the major physical properties of soil which is important to crop production is drainage through the rooting zone. This characteristic greatly influences aeration in the rooting zone, and the degree of aeration greatly influences several important biochemical reactions of economic importance to crop production.

Conservation Tillage Practices, Monroe Rasnake

Soil Science News and Views

The loss of topsoil from farmlands has become a serious problem in some parts of Kentucky. During the past 20 years, grain crop acreage has tripled. The production of soybeans, which leaves the soil in a condition more susceptible to erosion, has grown from almost none to 1.7 million acres. Much of this increased acreage has come at the expense of soil conserving crops such as hay and pasture on sloping class II and III land with an erosion hazard. Use of large equipment, larger fields, chemical weed control, etc., has added to the scope of the problem with which …

Climate Of Nebraska, Richard E. Myers

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Use Of Annual Legumes As Winter Cover For No-Till Corn, Robert L. Blevins

Soil Science News and Views

Legumes in crop rotations hsve traditionally provided nitrogen for nonlegume crops since the early history of agriculture. When in association with the proper strains of Rhyzobium bacteria, legumes are capable of fixing atmospheric nitrogen, which when residues from the legumes decompose, enrich the soil content of nitrogen. Legume cover crops recycle other nutrients, thus reducing leaching losses that often occur in soils during the winter and spring seasons. In addition to these advantages, legume cover crops used with no-tillage corn provide a surface mulch which reduces soil erosion, slows evaporation of soil moisture, increases infiltration of rainfall, and increases soil …

Groundwater Levels In Nebraska, 1979, Martin S. Johnson, Darryll T. Pederson

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Effects Of Soil Erosion On Productivity, Wilbur Frye

Soil Science News and Views

About 75 percent of Kentucky's agricultural land is sloping enough that potential erosion losses must be considered in its management. In addition to the effect of soil erosion on water pollution is the question of its effect on the productivity of the soil. This is a complex question due to the interactions of the many factors that affect crop growth. Furthermore, the same degree of erosion has a greater adverse effect on some soils than on others. The kind of erosion that has taken place or is taking place is a major factor in making land use decisions for crop …

Effects Of Changes In Surface Water Regime And/Or Land Use On The Vertical Distribution Of Water Available For Wetland Vegetation: Dynamic Model Of The Zone Of Aeration (Part 1 Of Completion Report For Project A-023-Ark), Robert N. Maccallum, R. A. Sims

Arkansas Water Resources Center Technical Reports

A mathematical model by Green, simulating one-dimensional vertical ground-water movement in unsaturated soils of the prairie region of Kansas, has been adapted for use in a wetlands environment typified by the wetlands forest of Eastern Arkansas. The model consists of two second-order, non-linear, partial differential equations and an algorithm for their numerical solution. The original model was extended to include functions for seasonal changes in transpiration and for drainage of excess precipitation. Before the addition of the two functions, the model reliability was limited to one growth season.

Delayed Nitrogen Applications On Corn, Grant W. Thomas

Soil Science News and Views

A method of fertilizer application that was standard practice 30 to 50 years ago has become important once again, and for the same reason. When nitrogen fertilizer was expensive and corn was cheap, it was considered prudent to save back some of the nitrogen fertilizer and apply it when the corn was "knee-high." This was thought to be safer because some of the nitrogen added at planting might be lost before the corn was big enough to take advantage of it. The increasing cost of nitrogen fertilizer has made efficient use of this product important again.

Influence Of Las Vegas Wash Density Current On Nutrient Availability And Phytoplankton Growth In Lake Mead, John R. Baker, Larry J. Paulson

Publications (WR)

Density currents are commonly formed in reservoirs because of temperature or salinity induced density differences between inflowing and receiving waters. Anderson and Pritchard (1951) were among the first to demonstrate this in their investigations of density currents in Lake Mead. They found that the Colorado River formed an underflow in Lake Mead during the winter, an overflow in the spring and an interflow in the summer and fall. Wunderlich and Elder (1973) have since described the hydromechanics of these types of flow patterns, and density currents have been reported for several other large reservoirs (Carmack et al. 1979, Johnson and …

Relationship Of Tecate Cypress Distribution To Soil Types, David E. Stottlemyer

Loma Linda University Electronic Theses, Dissertations & Projects

The Tecate Cypress (Cupressus forbesii Jeps.) is a gymnosperm tree of limited distribution. To determine if soil is an influencing factor in its distribution, the soil characteristics of a Tecate Cypress grove in the Santa Ana Mountains of Orange County, California, were compared with soils from neighboring communities and other Tecate Cypress groves. Soil samples were analyzed for texture, saturation percent, pH, and electrical conductivity. Tests were also run for nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, iron, manganese, copper and zinc.

Results seem to indicate that the Tecate Cypress soils are: 1) significantly more acidic than the soils …

Soybean Inoculation, J. L. Sims

Soil Science News and Views

Well-nodulated soybean plants are needed for most efficient soybean production. Recent research by University of Kentucky Agronomy Department personnel indicated that on Maury soil without N fertilizer, nodulating plant types of Clark 63 variety yielded 8 bushels per acre more than the non-nodulating Clark 63. With application of 125 lbs N per acre to the non-nodulating type only, both types yielded the same, showing the value of good nodulation.

Characteristics And Genesis Of Certain Soils In The Southern Foothills Of Central Alborz, Iran, Firouz Rooyani

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Characteristics and genesis of five pedons representing some of the soils of the central Alborz mountain northeast of Tehran were investigated. The present climate of the area is similar to the Mediterranean climate. The parent materials for the soils under study have apparently been derived from the Ecocene Alborz Green Beds (a thinly bedded light green mudstone), the Pliocene Hezardareh Formation (a poorly-cemented conglomerate) and Recent alluvium and colluvium. Pedons 2 and 4 are located at lower elevations (plain and river terraces) on 1 to 2 percent slopes. Pedons 3 and 5 are located at higher elevations (hills that surround …

Sorrel - Effects Of Soil Nutrients, Dock – Control, Lupins - Residual Dicamba. Peas - Herbicide Screening, Rape - Herbicide Tolerance, Ryegrass - Effect On Wheat Yield, ‘Round Up’ - Drift Test, Artichokes - Herbicide Screening., John Moore

Experimental Summaries - Plant Research

Sorrel - effects of soil nutrients - 80KA39, 80KA40, Dock – control - 80AL74, 80AL76. Herbicides for Spray Graze of Dock in Clover Pasture. J. Tuffley, Albany. Herbicide mixtures for Dock in Clover - R. Pugh, Narrikup. Lupins - residual dicamba - 80MT44. Spray graze with cattle - 80AL80 Peas - herbicide screening - 80AL77. Rape - herbicide tolerance - 80MT45. Ryegrass - effect on wheat yield - 79A32. ‘Round up’ - drift test - 80AL79. Artichokes - herbicide screening - C. Barone, Elliot Road, Wanneroo.

Determination Of Sediment Filtration Efficiency Of Grass Media, David T. Kao

KWRRI Research Reports

Vegetative filters serve the purpose of retarding flow. As a result the sediment carrying power of flowing water in a vegetated channel is greatly reduced and silting takes place along the section where the vegetation is planted.

The mechanism of the filtering action of real or artificial vegetation can be described by a simplified principle, in that a gross reduction of turbulent fluctuation of the fluid is involved. This in turn allows the sediment particles to settle under the force of gravity more readily. In the case of nonsubrnerged flow, solid particles may settle out even faster due to the …

Botanical And Ecological Aspects Of Coastal Raised Peatlands In Maine : And Their Relevance To The Critical Areas Program Of The State Planning Office, Ian A. Worley

Maine Collection

Botanical and Ecological Aspects of Coastal Raised Peatlands in Maine : and Their Relevance to the Critical Areas Program of the State Planning Office.

by Ian A. Worley

A Report Prepared for the Maine Critical Areas Program, State Planning Office, 184 State Street, Augusta, Maine 04333.

Planning Report No. 69 (January 1980)

Contents: Foreword / Abstract / Table of Contents / List of Figures / List of Tables / Acknowledgements / Introduction / Natural History and Ecology of the Coastal Raised Peatlands / Selection of Coastal Peatlands Recommended for Evaluation by the Critical Areas Program / General Evaluation of Coastal …

Wheat Potential Yield Trials 1980, M Perry, A Brown, R Weir, D Tennant, E Harvey, L Linton

Experimental Summaries - Plant Research

80C34, 80TS9, 80BA4, 80WH8, 80KA7, 80N20, 80E41.

Part I. Take-All Of Cereals, Rhizoctonia Bare Patch. Part Ii. Minimum Tillage Trials 1980, G C. Macnish

Experimental Summaries - Plant Research

A. Take-all of cereals. Take-all survey. Effect of nitrogen sources on take-all - 76LG25 (N = 50 kg/ha), 77E4 (N = 25 kg/ha), 77MT19 (N = 45 kg/ha), 77MT18 (N = 45 kg/ha) Oats (1977 Results).

Take-all and the economics of Agras No. 1 (1979 Results) – 79BA30 (N = 10 to 90), 79ES14 (N = 10 to 90), 79LG4 (N = 10 to 90).

Take-all, row spacing and rates of Agras No. 1 - 79ES41 (1979 Results).

Take-all and paddock grass history - 68NA1, 80NA58, 80NA59.

Take-all following cleaning crops - 79El2.

Take-all build-up on new land rotation - …

Septoria Diseases, A. G. P. Brown

Experimental Summaries - Plant Research

Effect of stubble and seed infection on S. nodorum at Badgingarra. Fungicide timing on Septoria control.

Double cropping wheat was simulated by spreading stubble fragments collected from an adjoining paddock at 30 g/m2. Infected seed was from a 1979 sowing at Badgingarra, clean seed was pedigree Gamenya ex Merredin. Treatments were thus:- 1. Clean seed, no stubble. 2. Clean seed plus stubble. 3. Infected seed, no stubble. 4. Infected seed plus stubble. Plots were 10 x 25 m separated by equal sized barley buffers.

Deep Ripping Trial, Wongan Hills Research Station/ Avondale Research Station. Rates Of Ryegrass And Rates Of N On Wheat Yield, M. L. Poole

Experimental Summaries - Plant Research

80WH52, 80A44, 80WH53. 80M41, 80M42.

The Effect Of Soil Acidity On Crop And Pasture Production, W Porter, W Cox, R Klemm

Experimental Summaries - Plant Research

Contents: 1. Summary. 2. Details of research. 2.1 Problem definition glasshouse trial. 2 (a) Vegetative yield affected by topsoil acidity. 2 (b) Root growth in acid subsoil . 2.2 Field Trials. (a) Wheat - Grain yield - Vegetative Growth. (b) Clover. (c) Acidification of soils from the use of nitrogen fertilisers 3. Appendices - trial data. Summary: 1. Problem defining glasshouse trials on soil from 12 sites were conducted in summer/autumn. Results showed that the components of soil acidity affecting wheat growth... 2. The lime and molybdenum requirements of wheat and clover were examined at the sites from which soil …

Grass Control And Minimum Tillage Herbicides, J. E. Holmes

Experimental Summaries - Plant Research

Bromegrass. Wheat loss caused by bromegrass - 80WH47. Herbicides for bromegrass control - 80WH48. Bromegrass control - spraytop - 79NO41. Control of bromegrass – spraytop - 79BA59. Brome and barley grass control - 80NA62. Wild oats. Wild oat control - comparison of commercial treatments – 80NO44. Wild oat control - minimum tillage system - high challenge SITE - 80NO45. Ryegrass. Ryegrass control. Hoegrass effect of rates x volumes x times of application - 80SG41. Barley grass. Barley grass control in wheat - 80SG40. Pasture manipulation. Pasture manipulation - grass reduction - 79A31. Pasture manipulation - rates of herbicide - 80AB3. …

Legume Seed Inoculation, D. L. Chatel

Experimental Summaries - Plant Research

List of experiments 1. 8ONA9A - The response of inoculated and non-inoculated field peas to fertilizer nitrogen on land not previously sown to peas. NARROGIN. 2. 8ONA9B - The response of inoculated and non-inoculated field peas to fertilizer nitrogen on land previously sown to peas. 3. 79GES8 - The performance of different strains of Rhizobium meliloti on different medics. TENINDEWA (Second year).