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Effects Of Different Intensities Of Grazing On Depth And Quantity Of Roots Of Grasses, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

The writer has been interested in prairies, pastures, and root depth and distribution over a period of many years. He had the privilege of examining these relationships in the Palouse prairie of Washington long ago while numerous representative areas still remained in a virgin condition (5, 6). Extensive studies have been made in the hardlands of Colorado, Kansas, and Nebraska many years before, during, and following the great drought of 1933-40 (7, 8, 1, 11). Vegetation and root habits have been studied in sand hills (7, 8, 4), in bluffs of wind-blown loess (12), and wet soils of lowland. The …

Microorganisms And Soil Structure, T. M. Mccalla

Department of Agronomy and Horticulture: Faculty Publications

SUMMARY

Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.

Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …

Bulletin No. 342 - The Nutritive Content Of The Grazing Sheep's Diet On Summer And Winter Ranges Of Utah, C. Wayne Cook, Lorin E. Harris

UAES Bulletins

Approximately two million sheep graze the native ranges of Utah each year. These animals are on the range most of the year and their food supply must come from range plants as they are normally selected. The nutritive value of range forage is often borderline or deficient in essential nutrients, yet, sufficiently adequate to prevent obvious physiological disorders. These mild deficiencies may affect the productive efficiency of the animal even though no symptoms are apparent.

Genetic And Taxonomic Studies In Gilia: I. Gilia Capitata, Verne Grant

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Notes On The Horticultural History Of California Irises, Lee W. Lenz

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Grassy Lake: A Biologist's Paradise, Dwight M. Moore

Journal of the Arkansas Academy of Science

No abstract provided.

Manual Of The Grasses Of The United States, Second Edition, A. S. Hitchcock, Agnes Chase

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

By the late A. S. HITCHCOCK (died December 16, 1935), principal botanist, Division of Plant Exploration and Introduction; second edition revised by AGNES CHASE, formerly senior botanist and later collaborator, Division of Plant Exploration and Introduction, Bureau of Plant Industry, Soils, and Agnculturat Engineering, Agricultural Research Administration, and research associate, United States National Museum, Smithsonian Institution.

Of all the plants of the earth the grasses are of the greatest use to the human race. To the grasses belong the cereals, sugarcane, sorghum, and the bamboos; and, since they furnish the bulk of the forage for domestic animals, the grasses are …

How To Make It: Rabbit Trap Is Easy To Build

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The rabbit trap described in this leaflet has proved satisfactory and is easy to build. It consists of a box with a drop door, held up by a projecting wire, one end of which is attached to a false floor or treadle. The weight of the rabbit on the treadle beyond the fulcrum pulls back the wire and releases the door.

Seed And Forage Production In Four Clonal Lines Of Alfalfa As Influenced By Lygus Infestation, John Keith Noyes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

No other forage crop cultivated in the United States can be used in as many ways as alfalfa. The variety of its uses make it a most useful forage crop.

The distribution of alfalfa is world wide and it plays a leading role in the production of livestock and their products. For general feeding of farm animals, alfalfa is unsurpassed. Used for pasture, it has a high capacity, which leads to large gains in grasing animals. If properly rotated and cared for, it adds nitrogen to the soil in a form that is available to plants and thereby increases crop …

Effect Of Grass On Intake Of Water, F. L. Duley, C. E. Domingo

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A large proportion of the land area of the United States is in grass. With the increasing interest in soil and moisture conservation and flood control, the intake of water from rainfall continues to be an important question in connection with grassland management. As has been shown by numerous investigations, many factors affect the rate of intake of water by soils. Among these are the type of soil, character of the rainfall, and the condition of the surface. In this paper are presented the results of infiltration tests made on different types of grassland. The tests were carried out in …

Bulletin No. 336 - Utah Agricultural Experiment Station Biennial Report, 1946-1948, R. H. Walker

UAES Bulletins

During the past biennium there has been a general expansion in the research program of the Agricultural Experiment Station. This was made possible through increased state legislative appropriation and through federal funds made available by the Agricultural Research and Marketing Act which passed Congress in August 1946, although funds were not available until August 1947. Grants-in-aid by state and private agencies have also made other research possible.

Drug Plants Of California, Frederick Louis Beauchamp

University of the Pacific Theses and Dissertations

Many books and articles have been written covering the flora of California. Few, however, have dealt specifically with those plants yielding drug principles used in the materia medica of the medical and pharmacy professions. Over one thousand different species of native and introduced drug plants are growing in the state. Many of these, it is true, have fallen into disuse, either because of lack of medicinal value, or substitutes have been found in the laboratories of the chemist.

The development of the drug farming industry will not only give employment to the state’s increasing population, but will enable our nation …

Mechanical Transmission Of A Plant Tumor Virus To An Insect Vector, Karl Maramorosch, Myron K. Brakke, L. M. Black

Department of Plant Pathology: Faculty Publications

Most plant viruses transmitted by leafhoppers have not been demonstrated to be infective in extracts. The virus dealt with in this paper causes tumors in certain susceptible plants, is carried by leafhoppers, and like others in that group has proven difficult to detect in extracts. It is our purpose to recount briefly the variety of methods that failed to transmit the virus and to report on the success of insect-to-insect transmission by injection.

Evidence For A Tryptophane Cycle In Neurospora, Francis A. Haskins, Herschel Mitchell

Department of Agronomy and Horticulture: Faculty Publications

The work of Snell on lactic acid bacteria provided the first evidence that anthranilic acid may act as a precursor to tryptophane in vivo. Since the strains of bacteria which utilize anthranilic acid in the place of tryptophane also use indole, it was not possible to establish the order in which these two precursors occurred. In 1943 Tatum, Bonner and Beadle found that anthranilic acid was accumulated in the culture medium by a Neurospora crassa mutant, strain 10575, which required either tryptophane or indole for growth. It was therefore indicated that anthranilic acid is a precursor to indole in …

Seed And Soil Treatments For Vegetable Crops Grown In Nebraska, M. W. Felton, J. E. Livingston

Nebraska Agricultural Experiment Station: Historical Circulars

Tests conducted during the past four years at the Nebraska Agricultural Experiment Station have shown that when seeds are planted in cold, wet soils, better stands of vigorous seedlings are generally obtained when the seeds are treated before they are planted.

The Effect Of Derris Root (Rotenone) Upon Plankton And Bottom Fauna Organisms Of A Small Minnesota Lake, Frank F. Hooper

Journal of the Minnesota Academy of Science

No abstract provided.

Taxonomic And Distributional Studies Of The New World Cypresses, Carl B. Wolf

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Changes In Vegetation And Production Of Forage Resulting From Grazing Lowland Prairie, J. E. Weaver, R. W. Darland

Department of Agronomy and Horticulture: Faculty Publications

When the early settlers came to Iowa, Nebraska, and adjacent territory they entered an almost boundless sea of grass. Throughout the years the prairie has been largely broken for crop production, but even today there still remain considerable tracts of native grassland annually mowed for hay and far greater ones of native pasture (Weaver and Fitzpatrick, '34). Climax grassland when grazed lightly or moderately may retain essentially its natural composition over extremely long periods. It is only when grazing animals are circumscribed in their range by fences and when too large a population is thus confined for too long a …

Effects Of Mowing Frequency On The Yield And Protein Content Of Several Grasses Grown In Pure Stands, L. C. Newell, F. D. Keim

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This paper presents results of a five-year experiment conducted at the Agricultural Experiment Station, Lincoln, Nebraska, on the adaptation, yield, and quality of several grasses subjected to different frequencies of harvest as a means of determining their forage value.

Ec1551 Insect Control In The Production Of Alfalfa Seed, Ephriam Hixson

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 1551 discusses insect control in the production of alfalfa seed.

Bulletin No. 327 - Utah Agricultural Experiment Station Biennial Report, 1944-1946, R. H. Walker

UAES Bulletins

During the past biennium there has been a general expansion in the research program of the Utah Agricultural Experiment Station. Although some of the investigations were curtailed by lack of personnel and equipment and the pressure of wartime assignments, many of the staff were able to devote more time to research because of a lessening of the teaching load at the College. The emergency caused a re-examination of the research program, old projects, no longer urgent were weeded out, others were revised to meet the needs of the changing times, and many new projects were initiated to extend the research …

Farm Fishponds, Verne E. Davison

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

An important part of soil and moisture conservation is making the best use of every acre on the farm. Where a suitable site for a farm pond exists, no better use can be made of such land than to develop it for the production of fish for the farm family. The recreation the pond affords adds much to the pleasure of rural life.

Thousands of farms have good pond sites. Properly developed and managed ponds may provide both food and pleasure to more than a million farm people.

This bulletin tells how to have good ponds. It explains how to …

Reduction Of Un-Grazed Mixed Prairie To Short Grass As A Result Of Drought And Dust, F. W. Albertson, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

Table of Contents:

Introduction
Soil and Soil Moisture
Vegetation
Early Results Of Drought
Alternating Moist Periods And Drought (1935-1939)
Period Of Most Critical Drought
Beginning of Dominance of Short Grasses
Spreading Of Short Grasses (1941)
Continued Spreading of Short Grasses and Consolidation of the Cover
The Record From Quadrats
Literature Cited

Bulletin No. 325 - An Economic Study Of Sheep Production In Southwestern Utah, Dee A. Broadbent, George T. Blanch, W. Preston Thomas

UAES Bulletins

Range sheep production has been one of the major agricultural enterprises in Utah, particularly in the southwestern part of the state, since these areas were first settled. Stock sheep numbers in Utah were about 2,100,000 by 1890, which is approximately the present number in the state. Since 1890 the numbers have fluctuated between 2,000,000 and 2,775,000.

This important industry has, from the time of its introduction, been closely associated with the use of public range lands. The unrestricted grazing of public range lands resulted in damage to a considerable area and was one of the important factors that led to …

North And South Dakota Horticulture, June 1946, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 19, Number 6

The Redstart, O.A. Stevens
Newslants, H.A. Graves
Garden Notes, W.E.H. Porter
Manitoba News Letter, W.R. Leslie
Garden Club Gleanings, Mrs. G.M. Jorgensen
Plants and Animals, H.R. Woodward
Beebe's Philosophy, H.E. Beebe
Fruit and Vegetable Notes, F.X. Wallner
Blizzard Belt Gardener, Mrs. Harold Miller
Iris Gleanings, Rev. E.L. Jackson
Secretary's Corner, W.A. Simmons
Book Review, W.R. Simmons

Bulletin No. 324 - Some Physical And Chemical Responses Of Agropyron Spicatum To Herbage Removal At Various Seasons, L. A. Stoddart

UAES Bulletins

Management of arid western ranges must be based upon the physiology of the individual plants which constitute the range. Too little is known of the ability of range plants to continue normal functioning under stress of grazing. Grazing doubtless has some beneficial influences in arid climates because it reduces transpiring surface. Possibly "pruning" has some stimulating effect, especially upon shrubs, and also, grazing animals plant seeds through trampling action. Despite these possible benefits, both trampling and removal of herbage by grazing must be .regarded as fundamentally detrimental to the welfare of plants, especially in arid climates. Trampling, especially on wet …

Legends And Uses Of Plants On The West Coast Of Greenland, Cecil Houghton

Journal of the Minnesota Academy of Science

No abstract provided.

Length Of Life Of Roots Of Ten Species Of Perennial Range And Pasture Grasses, J. E. Weaver, Ellen Zink

Department of Agronomy and Horticulture: Faculty Publications

It is well known that death of the tops of practically all prairie grasses occurs each fall in temperate grasslands where the soil is regularly frozen. Year after year new shoots replace the old ones in this vegetation of long- lived perennials. But as to what portion of the root system is retained and over what period of time, we are almost without information. This maintains despite the fact that much work has been done to increase our knowledge of the root systems of prairie grasses. Since the early studies of Weaver (6, 7) on their depth and lateral extent, …

Carotene Content Of Native Nebraska Grasses, I. L. Hathaway, H. P. Davis, F. D. Keim

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The carotene content of twenty-four grasses native to Nebraska were determined at approximately monthly intervals from June to November. While the carotene concentration of most of the grasses was moderately high during the growing season, it declined to a rather low point by late November. With the exception of Switchgrass, Hairy Grama, Little Bluestem and Prairie Dropseed, all of the grasses contained enough carotene to supply the needs of range cattle until late November. However, only eighteen of the grasses still contained enough carotene by the latter part of September to furnish the carotene required by dairy cows. Even as …

Injury And Death Or Recovery Of Trees In Prairie Climate, F. W. Albertson, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

Several years of decreasing precipitation initiated the 7 years of drought. By midsummer of 1934 it vas clear that the prairie region of the Middle West was undergoing the greatest drought since the beginning of its recorded weather history. The 12 months following June, 1933, was the driest weather period ever recorded not only for the Dakotas, Minnesota, Nebraska, Iowa, Illinois, and Missouri, but also drought in Kansas, Oklahoma, and Colorado was very severe (Kincer 1934). This intensely dry period, as well as those in several of the following years was accompanied by record-breaking temperatures, extremely low humidities, and exceptionally …