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Climate And Plant Growth In Certain Vegetative Associations, Arthur W. Sampson

Aspen Bibliography

The relation of climate to the growth and development of vegetation is of profound importance in both practical and experimental agriculture. It is extremely useful to know the cause of successful growth and establishment, or of partial success or failure, of various species in different plant associations and under widely contrasted climatic conditions. The climatic requirements of various plant types are largely responsible for the results obtained in the case of experimental seedings and plantings of most species. Once the adverse climatic factors are definitely known, failures with plants may be largely avoided by the judicious selection of sites or …

Common Parasites Of Swine, J. T. E. Dinwoodie

SDSU Extension Circulars

The publication of this bulletin is designed to convey to hog raisers of this state information regarding some of the common parasites of swine. All of the parasites described herein have been found infesting swine within the state. Some of the parasites may be common in some localities, and uncommon in others. Undoubtedly all sections of South Dakota are in danger at any time of experiencing loss from these parasites.

Bulletin No. 163 - Composition Of The Irrigation Waters Of Utah, J. E. Greaves, C. T. Hirst

UAES Bulletins

Analytical work which has so far been published on the composition of the irrigation waters of the Intermountain Region indicates a wide variation in their composition. Some are exceptionally pure, being nearly free from alkali, and may be used without fear of injury to soils; others contain larger quantities of alkali and must be used with care; still others are so heavily charged with soluble salts that they must be used with extreme caution, otherwise the growing crop will be injured and in time the soil rendered unfit for agricultural purposes. The land then must be either reclaimed or abandoned, …

Studies Concerning The Elimination Of Experimental Error In Comparative Crop Tests, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

It is apparent that many sources of error have unconsciously entered into comparative crop yield tests. The very important matter of overcoming variation in soil conditions as a source of experimental error has been quite extensively studied and reported by various investigators during the past decade. The means suggested for reducing such error have been (1) repetition of plats and (2) correction of yields according to check plats planted to a uniform variety or treatment at stated intervals. Both methods have proved of value and a combination of both may often be used advantageously. Some danger always exists of error …

Studies Concerning The Elimination Of Experimental Error In Comparative Crop Tests, Theodore A. Kiesselbach

University of Nebraska-Lincoln Extension: Historical Materials

It is apparent that many sources of error have unconsciously entered into comparative crop yield tests. The very important matter of overcoming variation in soil conditions as a source of experimental error has been quite extensively studied and reported by various investigators during the past decade. The means suggested for reducing such error have been (1) repetition of plats and (2) correction of yields according to check plats planted to a uniform variety or treatment at stated intervals. Both methods have proved of value and a combination of both may often be used advantageously. Some danger always exists of error …

Bulletin No. 158 - Soil Moisture Studies Under Dry-Farming, F. S. Harris, J. W. Jones

UAES Bulletins

Profitable cultivation of land under dry-farm conditions is dependent on the efficient use of precipitation. Soil fertility is not at present the limiting factor in crop production on most arid lands, but insufficient moisture to make available the fertility of these dry-lands is not only a limiting factor, but in most cases the controlling factor in crop production. The rainfall in the principal dry-farming areas of Utah varies from 12 to 15 inches a year. During different years it may range from 10 to 22 inches; therefore the best use must be made of the water that falls.

Bulletin No. 159 - Soil Moisture Studies Under Irrigation, F. S. Harris, A. F. Brakcen

UAES Bulletins

Under normal precipitation the variety of crops which can be successfully grown in the West is limited. Of necessity, irrigation was practised and with it came many complex problems. The water requirements of different crops, the water-holding capacity of soils, the movement of soil moisture, and numerous other related problems have given themselves up for investigational work.

Color And Color-Pattern Mechanism Of Tiger Beetles, Victor E. Shelford

University of Nebraska State Museum: Entomology Papers

In 1903 the writer undertook a study of variation of the tiger beetles. The work here presented is the outgrowth of this beginning, and indeed includes some small portions regarding color patterns that were written in that year. The work has been prolonged for many reasons, but chief of these was the very large number of species in the group and the fact that an adequate understanding of the material could not be attained without consulting many large collections. Further, the experimental results obtained in 1906 demanded a firsthand study of the variations of the species concerned and their natural …

Front Matter

Journal of the Minnesota Academy of Science

The last address of the late Newton Horace Winchell. Originally presented before the Iowa Academy of Sciences, at Cedar Falls, Iowa, April 24, 1914.

The Antiquity Of Man In America Compared With Europe, Newton Horace Winchell

Journal of the Minnesota Academy of Science

Last Lecture of Prof. N. H. Winchell, at Cedar Falls, Iowa, April 24, 1914, a week before his death; read also from this revised copy (by Warren Upham) at the monthly meeting of the Minnesota Academy of Science. February, 1916.

Ecological Studies In The Tension Zone Between Prairie And Woodland, J. E. Weaver, Albert F. Thiel

Department of Agronomy and Horticulture: Faculty Publications

Upon the completion of a series of investigations in southeastern Washington and adjacent Idaho, in which there was found to be a direct relation between the available water content of the soil and the evaporating power of the air as succession progressed from grassland through scrub to forest, the senior writer moved to Minneapolis, Minnesota. Here such excellent conditions of prairie invaded by scrub and followed by forest offered themselves for study that the services of the junior author were enlisted and an analysis of the situation attempted. Later this study was supplemented by similar work carried on at Lincoln, …

Spraying Experiments In Nebraska, J. Ralph Cooper

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The more important questions which were considered during the three years covered by the present report were as follows: 1. How many summer sprays are required and when should they be applied? 2. What is the difference in efficiency between various brands of arsenate of lead? 3. What are the relative values of lime sulphur and Bordeaux as fungicides for spraying apples? 4. Is it possible to lessen or prevent Bordeaux injury and at the same time control fungous diseases? 5. Is it possible to interchange Bordeaux and lime sulphur in a spray schedule in such a manner as to …

Bulletin No. 151 - The Freezing Of Fruit Buds, F. L. West, N. E. Edlefsen

UAES Bulletins

There are many orchards in this country, so located that every few years a frost almost completely destroys the crop, either by killing the buds in the spring of the year, or by freezing the fruit in the fall, just before it is picked. Utah is no exception. A report made by the county agricultural agents of the state, shows that in the spring of 1916, 85 percent of the apples, 90 percent of the peaches, and 65 percent of the mall fruit were killed by frost with a corresponding amount of damage to field crops.

Some Neotropical Megachilid Bees, T. D. A. Cockerell

Co

No abstract provided.

The Insect Association Of A Local Enviornmental Complex In The Dsitrict Of Holmes Chapel, Cheshire., Alfred E. Cameron

Bu

No abstract provided.

A Study Of The Vegetation Of Southeastern Washington And Adjacent Idaho, J. E. Weaver

University Studies (University of Nebraska) (1888–1984)

Noone at all botanically inclined can travel through southeastern Washington without being impressed with the marked changes which a distance of only a few miles may show in the vegetation. Traveling eastward from a point fifty miles west of the Idaho state line, one passes from a region of scab-land sagebrush through one of rolling hills covered with bunch-grasses. Upon steadily ascending the great Columbia Plateau, the 'bunchgrasses give way to well developed prairies, and these in turn, near the Idaho line, to forests of yellow pine, Douglas fir, white fir, tamarack, and cedar. Or starting from Spokane in the …

A Study Of The Vegetation Of Southeastern Washington And Adjacent Idaho, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

Introduction
Extent and position of area
Physiographic regions and geology
Soils
Topography and drainage
General plant-life conditions
General vegetational distribution
Outline of developmental series
Evaporatidn and soil moisture in relation to succession
Soil temperature in relation to succession
The prairie-plains formation
Agropyron-Festuca association
Festuca consociation
Agropyron consociation
Rhizocarpon-Lecidea associes
Gyrophora-Parmelia associes
Grimmia-Tortula associes
Poa-Polygonum associes
The desert scrub formation
Artemisia-Atriplex association
Artemisia consociation
The Pacific Coast forest formation
Thuja-Tsuga association
Symphoricarpos-Opulaster associes
Pinus-Pseudotsuga associes
Larix-Abies associes
Thuja consociation
Adsere Alnus-Salix associes
Subsere Natural reforestation in cut-over areas and in burns
Hydrosere
Chara-Potamogeton associes
Nymphaea-Potamogeton associes
Scirpus-Typha associes
Eleocharis-Carex associes
Wet …

Transpiration As A Factor In Crop Production, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The object of experiments reported in this bulletin has been to determine principles according to which water is used by crops. In many agricultural districts, water is frequently a seriously limiting factor in crop production. It has been thought that some means might be devised through a correct understanding of the principles involved, whereby economy in the use of water in farm practice could be increased. In this effort there are two chief points of attack, namely, (1) adjusting the external factors to the needs of the plant, and (2) selecting plants adapted to the conditions.

The Colloidal Swelling Of Wheat Gluten In Relation To Milling And Baking, F. W. Upson, J. W. Calvin

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Our experiments deal with the changes in hydration capacity of gluten under different conditions and were carried out by determining accurately the amount of water absorbed by gluten from solutions of varying concentrations of different acids, both with and without the presence of salts.

Bulletin No. 144 - Water Table Variations: Causes And Effects, A. B. Ballantyne

UAES Bulletins

No abstract provided.

Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker

University Studies (University of Nebraska) (1888–1984)

Briefly stated the purpose of the present investigation is to inquire into the effect of the more important habitat and seed factors upon the germination and early development of certain American forest trees in control cultures in the greenhouse for the purpose of obtaining data that may be used in the ~ilvicultural management of these species.

Prefatory Note 1 / Preliminary Considerations 7 / Historical 7 / Classification and Resume of Habitat Factors 11 / The Germination Process 15 / Method of Attacking Problem at Hand 19/ Methods and Apparatus Used 2 1/ The Control of Habitat Factors 24 / …

The Effect Of Climate And Soil Upon Agriculture, Russell R. Spafford

University Studies (University of Nebraska) (1888–1984)

Field studies in farm management are at present almost whclly confined to measu ring the profitableness of a farm business and analyzing the effect of those factors which fall largely within the control of the farm operator. While factors beyond individual control have always been recognized in field work, very little attempt has thus far 'been made to measure their influence upon farming; It is true that with present weather, soil, botanical, census, and farm management data only preliminary measurements can be made, but nevertheless such measurements do much toward correlating what at present are disconnected facts in agricultural science. …

Evaporation And Plant Zones In The Cedar Point Marsh, Paul B. Sears

Papers in Ecology

Yapp in trying to account for the xerophytic structure of marsh plants by means of evaporation studies has shown a definite correlation to exist between the strata of marsh vegetation and rates of evaporation at corresponding levels. The following studies were made in an attempt to discover what additional correlations, if any, exist between distribution of marsh plants and the evaporational power of the air at different portions of the habitat. While the exact quantitative significance of such work as the following may be brought into question, as it often is, the striking results obtained by Transeau, Livingston, Fuller, Weaver, …

Bulletin No. 141 - Variation In Minimum Temperatures Due To The Topography Of A Mountain Valley In Its Relation To Fruit Growing, L. D. Batchelor, F. L. West

UAES Bulletins

The most destructive weather enemy in all fruit growing sections is the late spring frost which frequently occurs after warm weather has caused the fruit blossoms to become fully developed. The variation in severity of such frosts in mountain valleys is a phenomenon well known to the practical orchardist. The actual extent of this variation and the contributing causes have claimed only a very little attention from scientific workers in the mountainous regions. The present publcation is a preliminary report of investigations which were planned to measure the extent of such temperature variations, and acertain if possible some of the …

Raising The Dairy Calf, E. G. Woodward

University of Nebraska-Lincoln Extension: Historical Materials

There are in Nebraska more than 600,000 dairy cows. The average period of usefulness of the dairy caw is not more than eight years. This means that to maintain the dairy herds of Nebraska at their present size between 70,000 and 80,000 heifer calves must be raised each year. To mate these cows properly with dairy bred bulls will require the rearing of about 8,000 bulls yearly. Aside from the necessity of maintaining the herds at their present size, the importance of calf raising to the Nebraska dairyman lies in the fact that this is the surest and most satisfactory …

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Department of Biology Faculty Publications

No abstract provided.

Breeding Habits Of The Heteronereis Form Of Platynereis Megalops At Woods Hole, Mass., E. E. Just

Faculty Reprints

No abstract provided.

Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard

Journal of the Minnesota Academy of Science

No abstract provided.

The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The profitable cultivation of the non-irrigable lands in west central and western Nebraska is limited by the amount and efficient use of the precipitation. There are tracts of land in the sand hills and minor tracts of badly worn heavier soils where the need of soil fertility is becoming evident. But, in the main, the great problem at present is not one of soil fertility, but of how to get enough water to make use of the fertility now present. The rainfall of this section, which varies from an actual shortage to seldom more than a meager sufficiency, makes it …

Newton Horace Winchell, 1839-1914, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.