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Physiological Significance Of Internal Water Relations To Crop Yield, R. O. Slatyer

Department of Agronomy and Horticulture: Faculty Publications

The overall effects of water deficits on crop yield are known to everybody. Moderate water deficiencies can result in stunting, distorted development, and much reduced crop yields, and prolonged drought can cause complete crop failure.
Despite these visible symptoms of deficiency, a clear and unambiguous statement as to the effect of deficits on crop yield is difficult to make, for a variety of reasons. Firstly, despite the importance of the phenomenon to agriculture in most of the food producing countries of the world, relatively little attention has been devoted to its water deficits. Secondly, and in part this is a …

Physiological Aspects Of Crop Yield (Frontmatter), Jerry D. Easton, Francis A. Haskins, C. Y. Sullivan, C. H. M. Van Bavel

Department of Agronomy and Horticulture: Faculty Publications

Foreword
Preface
Contributors
Contents

This volume is the outgrowth of an international symposium held at Lincoln, Nebraska, January 20-24, 1969. It was sponsored by the University of Nebraska in cooperation with the American Society of Agronomy and the Crop Science Society of America with partial financing by the Rockefeller Foundation and the International Biological Program.
The symposium planning committee was broadly based and was able to bring specialists from many parts of the world to the conference. Thus, the technical presentations were drawn from outstanding authorities backed up by a clear perspective of social needs. This was a happy combination …

Germ Plasm Manipulations Of The Future, George Sprague

Department of Agronomy and Horticulture: Faculty Publications

The topic, Germ Plasm Manipulations of the Future, could cover the entire field of genetics. This would be a very difficult assignment and, were I willing to attempt it, one that might not best serve the specific purpose of this symposium. I shall take a much more restrictive view and consider only certain phases of genetics which, in my opinion, will become of increasing importance in crop improvement.
In the period since 1900 genetics has achieved close and reciprocally productive relations with several fields of science. A partial listing of these would include genetics and cytology to yield cytogenetics; genetics …

Development, Differentiation, And Yield, John Heslop-Harrison

Department of Agronomy and Horticulture: Faculty Publications

The task of reviewing some of the ways development and differentiation may act as determinants of economic yield would be much simpler had knowledge advanced to a point where the basic principles concerned in the control of these processes in eukaryotic organisms were clear. Unfortunately, this stage has not yet been reached. There is no shortage of schemes and hypotheses to set beside a mountain of observational and experimental data, but the unifying thread which might allow us to pick out the significant and reject the irrelevant in any particular context is still lacking. What is incontestable is that development …

Plant Morphology And Stand Geometry In Relation To Nitrogen, Robert F. Chandler Jr.

Department of Agronomy and Horticulture: Faculty Publications

During the past decade, the importance of plant morphology and spacing in relation to nitrogen responsiveness in terms of crop yield has been increasingly recognized, particularly in the case of the cereal grains.
It is the purpose of this paper to present examples of experimental results obtained by rice research workers which support certain significant principles. Although this treatise will be confined to the rice plant (Oryza sativa L.),as Wittwer (1968) points out, the principles elucidated are applicable to many other crops, and particularly to the small grains, such as wheat (Triticum aestivum L.), oats (Avena sativa …

Physiological Responses To Nitrogen In Plants, Yoshio Murata

Department of Agronomy and Horticulture: Faculty Publications

Recent advances in crop physiology have given us some clues for analysis of the complex relationships of environmental factors, cultural conditions and genetic factors to crop yield. However, in order to accomplish this analysis, it is quite necessary to have concrete knowledge about the causal relationships and the time sequence of the processes of yield-formation.
In grain crops, the process of yield-formation may be divided into the following three phases:
1) Formation of organs for nutrient absorption and photosynthesis,
2) Formation of flower organs and "yield-container," and
3) Production, accumulation and translocation of "yield-contents."
The effect of nitrogen, which has …

Interrelationships Among Photosynthesis, Respiration, And Movement Of Carbon In Developing Crops, Volkmar Stoy

Department of Agronomy and Horticulture: Faculty Publications

From the preceding lectures we have learned a great deal about how external conditions may influence various internal physiological processes within plants, and it therefore appears appropriate to consider briefly how these processes influence one another and also the manner in which they relate to yield. The main processes of interest in this connection are photosynthesis, respiration, and carbon assimilate translocation; but aspects of growth, development, mineral nutrition, etc., will also be considered when relevant.

The Identification Of Cis-Ii, I2-Methylene-2-Hydroxyoctadecanoic Acid From Thiobacillus Thiooxidans, H. W. Knoche, J. M. Shively

Department of Biochemistry: Faculty Publications

A polar fatty acid has been observed as a component of an

ornithine-containing lipid of Thiobacillus thiooxidans. A

comparison of thin layer chromatographic mobilities of reference

compounds to those of the natural acid and its derivatives

suggested that the acid was a 2-hydroxy fatty acid.

The presence of a cyclopropane function in the acid was

indicated by l4e-Iabeling experiments and infrared spectroscopy.

Mass spectrometry of the methyl ester and the acetylated

methyl ester of the natural acid provided a molecular

weight for the acid. Equivalent chain lengths were determined

for the natural acid, the acid obtained by oxidative

decarboxylation of …

Axenic Ovarial Explants From The Marine Nematode Deontostoma Californicum On Culture Media, D. R. Viglierchio, Armand R. Maggenti, R. N. Johnson

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The gonads of Deontostoma californicum were isolated from the organismal environment by dissection. In an attempt to approximate the in vivo condition and to maintain in vitro architecture and function ten media recommended for the culture of insect cells or organs were tested. The media were prepared in two series: one according to published recommendations and the second substituting filtered seawater for the inorganic salts and distilled water. Media were prepared as both liquid and gel (agar) with and without antibiotics. Whole animals and eggs were placed on the same culture media series as the ovarial explants. Ovarial explant reaction …

Systems Analysis Of Natural Resources And Crop Production, Marion Clawson

Department of Agronomy and Horticulture: Faculty Publications

Human history is a seamless web; every event has its antecedents, its contemporaries, and its consequences. Each event arises out of the past, each is associated with other events at the time, and each leads to new events, in an endless chain. Indeed, there is difficulty in isolating any single event; when did it begin, what are its boundaries, when did it end? These are some of the problems of the social scientist generally, and of the historian in particular.
Nature is equally a seamless web. Every natural process or event has its cause or antecedent, each takes place within …

Namru-3 Translations Of Parasite Literature From Russian, French, Japanese, Etc. Into English (1909-1969) T301-T400, United States Naval Medical Research Unit Number Three, Cairo, Medical Zoology Department

United States Naval Medical Research Unit 3: Publications

T301. TRANSLATION FROM ITALIAN. TORTONESE, E. (1948). Ecological notes on a desert area of Lower Egypt (Tel-El-Kebir). Boll. Mus. Zool. Univ. Torino (1942-48), 1(13):155-183.

T302. TRANSLATION FROM RUSSIAN. EROPOV, V. I. (1962). Some data on diurnal activity of Ixodes persulcatus P. Sch. in Irkutsk Oblast. Mater. Yubil. Nauch. Konf. Irkutsk. Nauch. -Issled. Inst. Epidem. Mikrobiol. pp. 15-16.

T304. TRANSLATION FROM CHINESE. CHANG, P. -H. LOU, W. -Y., TENG, C. -C. and HSU, A. -C. (1964). Studies on tick infestation of domestic animals in Nanking. Acta Zool. Sin., 16(1):132-138.

T305. TRANSLATION FROM RUSSIAN. NIKOL'SKY, S. N. and MESHCHERYAKOVA. V. D. (1964). …

Predicted Versus Measured Production Differences Using Summer Air Conditioning For Lactating Dairy Cows, Leroy Hahn

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

Predicted summer production losses were made for Holstein cows in three widely separated locations in the United States where field investigations of air conditioning for dairy barns have been completed. These losses, based on a functional relationship developed from Missouri Climatic Laboratory data and local climatological data, were compared to the measured losses at each location. Correlation of losses for Holstein cows varied from excellent in northern Ohio to good in southern Louisiana and central Missouri. Variations due to hotter- or cooler-than-normal summer seasons and level of production were reasonable at all locations.

Agricultural Experiment Station News December 1968

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE ACTING DIRECTOR'S DESK
FIELD LABORATORY DEVELOPMENT - 1968
PERSONNEL ACTIONS
NEW GRANTS, CONTRACTS AND COOPERATIVE AGREEMENTS
GENERAL NOTES
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - DECEMBER 1968
STATION AND RESEARCH BULLETINS PRINTED

82nd Annual Report Of The Nebraska Agricultural Experiment Station

Agricultural Research Division: News and Annual Reports

Contents:
Foreword
Administration and Staff
Nebraska Agricultural Experiment Station Research Projects
Experiment Station Publications
Publications of the Staff
Report of Income and Expenditures

Department Of Entomology Newsletter - No. 3, 1968, Bruner Entomology Club, Jon J. Tollefson

Hexapod Herald and Other Entomology Department Newsletters

Bruner Entomology Club

University of Nebraska State Museum, Division of Entomology

Field Trip, 1968

Insect Pathology Program

New Staff: Earle S. Raun (Chairman), John B. Campbell, Thomas J. Helms

Undergraduates and Undergraduate Teaching

Staff: Roscoe E. Hill, Kenneth P. Pruess, James M. Shalk, J. Derril Munson, Walter R. Akeson, Robert E. Roselle, Donald E. Lawson, Earle S. Raun, S. Dean Kindler, Robert Staples, Lloyd W. Andersen, Harold J. Ball, George R. Manglitz, Paul C. Peterson, Calvin M. Jones, John B. Campbell, David L. Keith, Thomas J. Helms

Clerical and Technical Staff: Esther A. Schock, Carla M. Tollefson, Barbara J. Lloyd, …

Agricultural Experiment Station News September 1968

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTORS OFFICE
INTERDISCIPLINARY RESEARCH PROGRAMS
PERSONNEL ACTIONS
NEW GRANTS, CONTRACTS AND COOPERATIVE AGREEMENTS
GENERAL NOTES
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – September 1968

Agricultural Experiment Station News July 1968

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
FACILITIES• PROGRESS
PERSONNEL ACTIONS
NEW GRANTS, CONTRACTS, AND COOPERATIVE AGREEMENTS
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - JULY 1968

The Biology Of Choristoneura Houstonana (Lepidoptera: Tortricidae), A Pest Of Juniperus Species, E. A. Heinrichs, Hugh E. Thompson

Department of Entomology: Faculty Publications

Choristoneura houstonana (Grote) lays eggs singly in July. Egg development ranged from 8 to 11 days, with the majority hatching 10 days after oviposition. Larvae are solitary, and mine during early instars, but later instars feed externally on leaves in shelters made by webbing foliage together. There is one generation each year, and overwintering occurs in a hibernaculum, in mined leaves. Field-collected head-capsule width frequencies indicated nine larval instars. Rearing larvae on seedling junipers indoors indicated a range of 8–11 instars. Pupation occurs during June and July in the shelter where the larva feeds. The pupal stage lasted about 10 …

Improvement Of Beef Cattle Through Breeding Methods. Summary Of Results From Regional Project Nc-1, Larry V. Cundiff, Keith E. Gregory

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This publication is a revision of North Central Regional Publication 120, published by the Nebraska Agricultural Experiment Station (Research Bulletin 196) in July, 1961. It summarizes the more important results from this project during its first 19 years of operation. It is by no means complete and includes only what is considered to be the "highlights" of findings at this time. A bibliography of all publications that provided the basis for this summary statement is included. This publication is in the nature of a progress report on many aspects of beef cattle breeding research. Although it is based on considerably …

Influence Of Advance In Season On Nutritive Value Of Forage Consumed By Cattle Grazing Western Nebraska Native Range, C. L. Streeter, D. C. Clanton, O. E. Hoehne

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The purpose of this study was to determine the influence of the advance in season on the nutritive value of forage consumed by cattle grazing western Nebraska summer range. Eleven digestion trials were conducted during the summer grazing season of two consecutive years.

Ec68-649 Why Milk Fat Tests Vary, C. Nibler, F. Owen, T. Evans

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-649 discusses why milk fat tests vary.

Ec68-129 Nebraska Swine Progress Report

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-129 is the 1968 Nebraska Swine Progress Report.

Ec68-1423 Turkey Management Guide, Thomas W. Sullivan, Earl W. Gleaves, Ted E. Hartung

University of Nebraska-Lincoln Extension: Historical Materials

The extension circular is a guide to good turkey management. It includes the following subject areas: land and location, general building recommendations, equipment and supplies, source of stock, management practices, and disease prevention and control.

Ec68-218 1968 Nebraska Beef Cattle Progress Report

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-218 contains the 1968 Nebraska Beef Cattle Progress Report.

Weight Gain And Carcass Measurements Of Pigs From Gilts Fed Adequate Vs. Protein-Free Diets During Gestation, W. G. Pond, J. A. Dunn, G. H. Wellington, J. R. Stouffer, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Fifty-two weanling pigs from six litters(Pond et al., 1968) were fed a standard 18% protein corn-soybean meal diet from weaning to slaughter. The six litters were from gilts paired on the basis of parturition date so that one gilt fed the control diet and one fed the “protein-free” diet (0.5% protein) from week 4 of pregnancy to parturition made tip each pair. Each dam was fed the control diet throughout lactation and nursed one-half of her own litter and one-half of a pairmate’s litter resulting from reciprocal transfer of one-half of each litter at birth. Individual bodyweight gains and feed …

Ec68-131 Nebraska Handbook Of Range Management, John F. Vallentine

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 68-131 contains the Nebraska handbook of range management.

Ec68-217 Selection And Crossbreeding For The Pork Producer, Leo Lucas

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-217: Selection and crossbreeding for the pork producer; introduction, crossbreeding information, systems of crossbreeding, single cross between two breeds, two breed cross, three-breed cross, breed selection, hybrid boars, selection of breading stock, and purchasing boars.

Ec68-1423 Turkey Management Guide, T. Sullivan, E. Gleaves, T. Hartung

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-1423 is a turkey management guide.

Ec68-1424 Quality Control Of Eggs And Egg Products, G. W. Froning, T. E. Hartung

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 68-1424: Quality control of eggs and egg products; properties of egg such as composition, and bacterial barriers. Producer’s and shell egg processor’s responsibility for quality control such as gathering, pre-cooling and storage, packing, oiling, salmonellae control, washing, in-plant washing, and pesticides. Responsibilities of egg products processors for quality control, for example product specification, sanitation, and pasteurization. Quality control tests such as producer and shell-egg processor, and egg products processors.

1968 Nebraska Swine Report

Nebraska Swine Reports

1968 Nebraska Swine Report