Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Plant Sciences (148)
- Agronomy and Crop Sciences (100)
- Animal Sciences (66)
- Plant Pathology (58)
- Agricultural Economics (43)
-
- Plant Breeding and Genetics (39)
- Dairy Science (25)
- Entomology (24)
- Horticulture (24)
- Poultry or Avian Science (22)
- Physical Sciences and Mathematics (21)
- Botany (18)
- Nutrition (15)
- Business (14)
- Earth Sciences (14)
- Soil Science (14)
- Other Animal Sciences (13)
- Plant Biology (13)
- Agribusiness (12)
- Weed Science (8)
- Meat Science (7)
- Medicine and Health Sciences (7)
- Veterinary Medicine (7)
- Environmental Sciences (6)
- Veterinary Infectious Diseases (5)
- Agricultural Science (4)
- Food Science (4)
- Other Plant Sciences (4)
- Keyword
-
- Nebraska (74)
- Yield (27)
- Corn (26)
- Protein (25)
- Wheat (25)
-
- Winter wheat (20)
- Alfalfa (19)
- Chicks (18)
- Feeding trial (18)
- Test weight (15)
- Diseases (14)
- Holstein (14)
- Lodging (14)
- Lysine (14)
- Maturity (14)
- Nitrogen (14)
- Shattering (14)
- Winter survival (14)
- Nursery (13)
- Plant height (13)
- Spring wheat (12)
- Zea mays (12)
- Breeding (11)
- Jersey (11)
- Potatoes (11)
- Frost damage (10)
- Guernsey (10)
- Phosphorus (10)
- Soil moisture (10)
- Storage (10)
Articles 121 - 150 of 271
Full-Text Articles in Agriculture
Effect Of Time Of Cutting On Yield And Botanical Composition Of Prairie Hay In Southeastern Nebraska, Elverne C. Conard, Vincent H. Arthaud
Effect Of Time Of Cutting On Yield And Botanical Composition Of Prairie Hay In Southeastern Nebraska, Elverne C. Conard, Vincent H. Arthaud
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Approximately three and one-third million acres of native prairie are harvested annually in Nebraska for hay. In the four-year period 1948-1951, the State ranked first in wild hay production with an average yield of more than two and one-quarter million tons per year. This crop is an important natural resource in Nebraska's livestock industry. Studies were initiated in 1945 to determine the effects of time of cutting on the yield and feeding value of prairie hay in southeastern Nebraska. The studies were continued through the summer of 1952 to determine the effects of different cutting treatments on the vigor and …
Forty Years Of Dairy Cattle Breeding At The North Platte Experiment Station, Mogens Plum, Myron G.A. Rumery
Forty Years Of Dairy Cattle Breeding At The North Platte Experiment Station, Mogens Plum, Myron G.A. Rumery
Nebraska Agricultural Experiment Station: Historical Research Bulletins
In 1913 the Nebraska Legislature appropriated $17,500 to establish a Dairy Department at the North Platte Experiment Station. The department's herd was to be used in demonstrating management and breeding practices and as a source of breeding stock. Since the North Platte herd was started, research in the field of animal breeding has developed new concepts in many phases of dairy cattle breeding and selection. The purpose of the present study is to analyze the progress made under a system of dairy cattle breeding and selection carried out according to the principles that dominated 40 years ago. The results of …
Rate Of Potato Tuber Growth On Dryland At The Box Butte Experiment Farm, H. O. Werner
Rate Of Potato Tuber Growth On Dryland At The Box Butte Experiment Farm, H. O. Werner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Relatively late planting of potatoes, i.e., between June 12 and 25, has become the prevailing practice in the dryland areas of western Nebraska. Late planting distinctly improves the color and type of tubers, and reduces losses due to insects and diseases (especially soil-borne diseases caused by Fusarium and Streptomyces). Growers must decide each year whether the increase in yield and tuber maturity gained by delaying harvest will be offset by the risk of impaired tuber quality due to scab or possible serious field frost damage. Information about the rate at which tubers are developing by various dates is essential …
Comparative Measurements Of Holstein, Ayrshire, Guernsey, And Jersey Females From Birth To Seven Years, H. P. Davis, I. L. Hathaway
Comparative Measurements Of Holstein, Ayrshire, Guernsey, And Jersey Females From Birth To Seven Years, H. P. Davis, I. L. Hathaway
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Body measurements are important for a proper understanding of how growth takes place in animals. Unfortunately, few growth data other than for weight have been published concerning dairy cattle. This is a report of measurements of females in the University of Nebraska dairy herd made as part of a long-time growth study. During the period 1922 to 1942 each animal born into the herd was weighed and measured at regular intervals. Presented here are the data for weight, height, length, width, depth, girth and hide thickness for females of the Holstein, Ayrshire, Guernsey, and Jersey breeds. The average body measurements …
False Smut Of Buffalograss, John L. Weihing
False Smut Of Buffalograss, John L. Weihing
Nebraska Agricultural Experiment Station: Historical Research Bulletins
False smut of buffalograss, Buchloe dactyloides (Nutt.) Engelm., caused by Cercospora seminalis Ell. & Ev. is a disease that destroys the unfertilized ovary. The disease was first reported by J. B. Ellis and B. M. Everhart in 1888. They gave only a brief description of the disease and named the causal fungus Cercospora seminalis. There are no etiological studies of false smut recorded in the literature. The origin of the term "false smut" is unknown to the author, but it so descriptively fits the general appearances of the disease that one readily understands its usage. The following studies were …
Streak Mosaic Of Wheat In Nebraska And Its Control, R. Staples, W. B. Allington
Streak Mosaic Of Wheat In Nebraska And Its Control, R. Staples, W. B. Allington
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This bulletin reports the results of studies on the epidemiology of wheat streak mosaic under Nebraska conditions. Particular attention is given to the occurrence and certain characteristics of the mite vector of the virus, the relation of weather and other factors to some of its activities, a correlation of certain mite situations with epidemics of the disease, and recommendations for disease control.
Growth Measurements Of Holstein Females From Birth To Seven Years, H. P. Davis, I. L. Hathaway
Growth Measurements Of Holstein Females From Birth To Seven Years, H. P. Davis, I. L. Hathaway
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Measurements of growth, to be meaningful, must be taken of various parts of the body, at regular intervals, under standardized environmental conditions, from birth through the growth span of the animal. From these measurements skeletal growth standards may be prepared for the several ages. Such standards can be used to measure growth at any age period. They will serve the research worker as a guide for experimental procedure and will provide the livestock raiser a basis with which his animals may be compared. Present standards of growth for dairy cattle are based mostly upon live weight, although considerable data are …
Influence Of Atmospheric And Soil Moisture Conditions On Diurnal Variations In Relative Turgidity Of Potato Leaves, H. O. Werner
Influence Of Atmospheric And Soil Moisture Conditions On Diurnal Variations In Relative Turgidity Of Potato Leaves, H. O. Werner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The experimental work reported herein was planned to determine: 1. The extent and nature of the changes of the relative turgidity (R.T.) of leaves of the potato plant during the diurnal cycle. 2. The extent to which R.T. of potato leaves is influenced by atmospheric conditions, soil moisture, variety and age of plants. 3. The extent to which visible evidence of water shortage in leaves is indicative of water loss from them as revealed by R.T. and the extent to which this relationship varies with different varieties. 4. The nature of the relationships between morphological characteristics of leaves and stems …
Economic Analysis Of Forage Production And Utilization In Dakota And Dixon Counties, Nebraska, Howard W. Ottoson
Economic Analysis Of Forage Production And Utilization In Dakota And Dixon Counties, Nebraska, Howard W. Ottoson
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Soil erosion remains a serious problem on many Nebraska farms despite programs of financial assistance, technical aid, and education by several national and state agencies. One reason that soil conserving adjustments in land use have not been made by farmers is that considerable uncertainty surrounds the economics of soil erosion control on the farm level. This study is an attempt to increase knowledge and reduce some of the uncertainty with regard to the economics of erosion control in a specific area.
Commercial Fertilizers For Winter Wheat In Relation To The Properties Of Nebraska Soils, R. A. Olson, H. F. Rhoades
Commercial Fertilizers For Winter Wheat In Relation To The Properties Of Nebraska Soils, R. A. Olson, H. F. Rhoades
Nebraska Agricultural Experiment Station: Historical Research Bulletins
It is the purpose of this bulletin to report the investigations that have been made correlating soil properties and fertilization practices with yields of winter wheat. Since the success or failure of fertilization practices is so dependent on specific soil conditions, an attempt has been made here to further characterize the major soils of the different sections of the state which are devoted to wheat production and to analyze fertilizer practices and results in relation to the soil properties determined. The data are summarized for the four sections of the state designated as southeastern, east-south-central, west-south-central and western Nebraska. These …
Inheritance Of Sterility, Flower Color, Spinelessness, Attached Pappus And Rust Resistance In Safflower, Carthamus Tinctorius, Carl E. Claassen
Inheritance Of Sterility, Flower Color, Spinelessness, Attached Pappus And Rust Resistance In Safflower, Carthamus Tinctorius, Carl E. Claassen
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Since literature pertaining to breeding and inheritance in safflower was found to be very limited, fundamental research was instituted to determine: (A) a method for making controlled crosses, (B) the amount of natural crossing that occurs, (C) the association of oil content of seed with other seed and plant characteristics, and (D) the mode of inheritance of sterility, flower color, spinelessness, attached pappus and rust resistance. Results on natural and controlled crossing in safflower and the association of oil content in seed with other plant and seed characteristics have been reported. It is the purpose of this bulletin to report …
Reduced Ascorbic Acid Content Of Potatoes Grown With And Without Straw Mulching And Irrigation In Eastern Nebraska, H. O. Werner, Ruth M. Leverton, Mary R. Gram
Reduced Ascorbic Acid Content Of Potatoes Grown With And Without Straw Mulching And Irrigation In Eastern Nebraska, H. O. Werner, Ruth M. Leverton, Mary R. Gram
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Potatoes harvested from home gardens and in commercial early-producing fields in the Midwest are an important low-cost source of ascorbic acid from late June into September. The major portion of the early commercial crop in Nebraska (harvested mostly in August) is produced with irrigation. Straw or litter mulching is a well established practice in the nonirrigated garden and farm potato patches. The value of these cultural methods for increasing yield is well known, but prior to this study little was known about their influence on the ascorbic acid content of the tubers, or about the persistence of any such influence …
The Effects Of Thermal-Neutron Irradiation Of Maize And Barley Kernels, John W. Schmidt, E. F. Frolik
The Effects Of Thermal-Neutron Irradiation Of Maize And Barley Kernels, John W. Schmidt, E. F. Frolik
Nebraska Agricultural Experiment Station: Historical Research Bulletins
It is the purpose of this paper to report the effects of thermal-neutron irradiation of maize and barley kernels on subsequent germination, plant establishment, and early plant development. Comparisons are made with equivalent neutron treatments of maize pollen, results of which have been reported in part in previous publications.
Effect Of Low Temperature On The Germination Of Artificially Dried Seed Corn, J. E. Livingston
Effect Of Low Temperature On The Germination Of Artificially Dried Seed Corn, J. E. Livingston
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Soil pathogens were primarily responsible for the reduction in emergence of corn seedlings following the cold treatment. The susceptibility of the seedlings to soil pathogens was much greater when the seedlings were exposed to a soil temperature of 5° C for 7 to 14 days than when they were held continuously at 20° C. Seedling emergence was in inverse relation to kernel moisture content at time of harvest. Artificial drying of the seed intensified this effect, particularly in nonsterile soil. Treatment of the seed with Arasan prior to planting completely eliminated the effect of soil pathogens on seedling emergence either …
The Utilization Of Food Elements By Growing Chicks. Xiii. The Effect Of Additions Of Dehydrated Alfalfa Meal To High Corn Chick Rations, C. W. Ackerson, R. L. Borchers, F. E. Mussehl
The Utilization Of Food Elements By Growing Chicks. Xiii. The Effect Of Additions Of Dehydrated Alfalfa Meal To High Corn Chick Rations, C. W. Ackerson, R. L. Borchers, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Feeding trials were conducted on three groups of chicks in eight lots receiving a growing mash containing dehydrated alfalfa meal at levels of 2, 3, 4, 5, 6, 9, 10, 12, and 15 per cent. Comparisons were not made simultaneously but no general trend toward growth depression was evident in comparable lots. In addition duplicate trials of four lots of newly hatched New Hampshire chicks were made on pelleted rations carrying 0, 2, 4, and 6 per cent of a good quality dehydrated alfalfa meal. The chicks were all fed accurately known amounts of the pelleted rations for six weeks. …
Progressive Development And Seasonal Variations Of The Corn Crop, T. A. Kiesselbach
Progressive Development And Seasonal Variations Of The Corn Crop, T. A. Kiesselbach
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The chief purpose of these studies has been to determine the normal growth changes that occur in the corn plant at successive intervals when growing in the field, and to observe annual yield variations in relation to prevailing weather conditions. Aside from supplying information regarding the physiology of this crop, the data are of interest to the corn grower because they indicate comparative yields, shelling percentages, moisture contents, and feed constituents at various stages of development. Some data also are presented concerning the effects of frost, drouth, day length, and the economic value of tillers and seminal roots.
Effect Of Stubble Mulching On Number And Activity Of Earthworms, S. P. Teotia, F. L. Duley, T. M. Mccalla
Effect Of Stubble Mulching On Number And Activity Of Earthworms, S. P. Teotia, F. L. Duley, T. M. Mccalla
Nebraska Agricultural Experiment Station: Historical Research Bulletins
A survey of earthworm population under different cropping systems was made under stubble mulch farming and where the residue was plowed under. The influence of earthworms on some of the important physical and biological properties of the soil was studied. Their role in the decomposition of crop residues was also determined.
The Structure And Reproduction Of Corn, T. A. Kiesselbach
The Structure And Reproduction Of Corn, T. A. Kiesselbach
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The primary purpose of this paper is to summarize investigations concerning the structure and reproduction of the corn plant (Zea mays L.). Because of wide interest in the reproductive process in connection with breeding and genetic studies the floral development, fertilization, and embryology are especially stressed. The morphology and development of the vegetative organs is also included. The botanical relationship, origin, genetics and breeding of corn are briefly considered.
Effect Of Storage Temperatures On Triumph Seed Potatoes Used For The Early Crop In The South And In Central Nebraska, H. O. Werner
Effect Of Storage Temperatures On Triumph Seed Potatoes Used For The Early Crop In The South And In Central Nebraska, H. O. Werner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
During the decade 1931-1940 it became increasingly apparent that some factor (or factors) besides disease was responsible for much of the variation in yields produced by lots of certified seed potatoes planted in commercial fields and comparative trial plots in the South during midwinter. This bulletin reports investigations into the method of storing western Nebraska seed potatoes as a means of improving the production of the early crop of Triumphs in the Gulf Coast States.
Pink Rot Of Potatoes Caused By Phytophthora Erythroseptica Pethyb., R. W. Goss
Pink Rot Of Potatoes Caused By Phytophthora Erythroseptica Pethyb., R. W. Goss
Nebraska Agricultural Experiment Station: Historical Research Bulletins
During the summer of 1943 reports were received of rotted tubers occurring in fields of early potatoes in central Nebraska. An estimated 10 per cent of the tubers were found rotted in some fields on August 5. In November and December of the same year the late-producing area of western Nebraska reported the occurrence, at harvest and in storage, of tuber rots differing from those previously recorded for that area. Specimens appeared similar to those observed during the summer in central Nebraska. Isolations were made and pathogenicity tests were conducted both on tubers and growing plants to study the influence …
Effect Of Grass On Intake Of Water, F. L. Duley, C. E. Domingo
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 …
Effect Of Position Within A Large Storage Bin Upon Midwinter Behavior Of Nebraska Triumph Seed Potatoes, H. O. Werner
Effect Of Position Within A Large Storage Bin Upon Midwinter Behavior Of Nebraska Triumph Seed Potatoes, H. O. Werner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Much variation in time of emergence of plants has been observed within lots of Nebraska seed potatoes planted in the South during the winter. In large storage bins in western Nebraska the end of the dormancy period of tubers in various parts of the bin, as determined by the appearance of sprouts, may vary from January to May. It has been surmised that differences in temperatures and perhaps other conditions in various parts of the bin may account for such variations. In the winter of 1941-42 an experiment was conducted to determine the extent to which the position of potatoes …
Trypsin Inhibitor. Vii. Comparative Nutritive Value Of Raw And Heated Soybean Meal For Poults, C. W. Ackerson, Raymond Borchers, F. E. Mussehl
Trypsin Inhibitor. Vii. Comparative Nutritive Value Of Raw And Heated Soybean Meal For Poults, C. W. Ackerson, Raymond Borchers, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Research Bulletins
I. The trypsin inhibitor contained in one-half of a lot of soybean meal was destroyed by autoclaving at 15 pounds for 20 minutes. 2. This portion of the meal when fed at a level of 24 per cent to newly hatched poults gave a significantly greater gain in five weeks than did an equal amount of meal in which the inhibitor had not been destroyed. 3. The difference in growth is attributed to the destruction of the trypsin inhibitor.
Distribution Of Microorganisms In The Soil As Affected By Plowing And Subtilling Crop Residues, Roy C. Dawson, Virginia T. Dawson, T. M. Mccalla
Distribution Of Microorganisms In The Soil As Affected By Plowing And Subtilling Crop Residues, Roy C. Dawson, Virginia T. Dawson, T. M. Mccalla
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The purpose of this investigation was primarily to determine what effects rate and method of application of residues have on the distribution of microorganisms within the plow-depth layer of soil.
The Influence Of Length Of Storage Of Bovine Semen On Conception Rate Under Field Conditions, A. B. Schultze, H. P. Davis, C. T. Blunn, M. M. Oloufa
The Influence Of Length Of Storage Of Bovine Semen On Conception Rate Under Field Conditions, A. B. Schultze, H. P. Davis, C. T. Blunn, M. M. Oloufa
Nebraska Agricultural Experiment Station: Historical Research Bulletins
It is the purpose of this study to determine whether under conditions of routine handling in artificial breeding associations there is a decline in semen fertility from day to day and also to determine the magnitude of this decline. Tabulation of such data will not only be of value in determining the effect of frequent semen collection on the over-all artificial breeding results but will also serve as a basis of comparison in investigational work directed toward increasing the efficiency of artificial breeding.
Breeding Efficiency In Dairy Cattle From Artificial Insemination At Various Intervals Before And After Ovulation, George W. Trimberger
Breeding Efficiency In Dairy Cattle From Artificial Insemination At Various Intervals Before And After Ovulation, George W. Trimberger
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The length of estrus and the time of ovulation were determined for 46 heifers and 86 cows of the Ayrshire, Guernsey, Jersey, and Holstein breeds by testing for end of estrus and ovulation at 2-hour intervals. Services were given by artificial insemination at various intervals before and after ovulation to determine the influence of this factor on the rate of conception. No significant breed or seasonal differences were found for length of estrus and ovulation time after end of estrus among the four dairy breeds represented in the experiment.
Trypsin Inhibitor. V. Nutritive Value Of Treated Soybean Oil Meal And Some Characteristics Of The Trypsin Inhibitor In Soybeans, Raymond Borchers, W. E. Ham, R. M. Sandstedt, C. W. Ackerson, R. H. Thayer, F. E. Mussehl
Trypsin Inhibitor. V. Nutritive Value Of Treated Soybean Oil Meal And Some Characteristics Of The Trypsin Inhibitor In Soybeans, Raymond Borchers, W. E. Ham, R. M. Sandstedt, C. W. Ackerson, R. H. Thayer, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The marked improvement in the apparent nutritive value of soybean protein after heating has long been recognized. The fundamental cause of this improvement has never been fully understood. Furthermore, commercial soybean oil meal varies considerably in nutritive value although heat treatment is common in most processing plants. Since heating is generally regarded as deleterious to the nutritive quality of protein, the following investigations of various treatments of soybean oil meal are of particular importance in developing a soybean or soybean oil meal of maximum and uniform nutritive value.
Effects Of Mowing Frequency On The Yield And Protein Content Of Several Grasses Grown In Pure Stands, L. C. Newell, F. D. Keim
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.
The Utilization Of Food Elements By Growing Poults, C. W. Ackerson, F. E. Mussehl
The Utilization Of Food Elements By Growing Poults, C. W. Ackerson, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Research Bulletins
1. Day-old poults were found to contain an average of 1.28 g nitrogen, 0.18 g calcium and 0.15 g phosphorus. 2. Day-old poults were fed equal amounts of a good growing ration for 52 days. Analysis of these poults showed retention of 42.6 per cent of the nitrogen, 23.4 per cent of the calcium and 31.3 per cent of the phosphorus contained in the ration. 3. Retentions of nitrogen, calcium and phosphorus were on the same order as those obtained in like feeding trials with chicks.
The Vitamin A And Carotene Content Of Nebraska Butter, I. L. Hathaway, H. P. Davis
The Vitamin A And Carotene Content Of Nebraska Butter, I. L. Hathaway, H. P. Davis
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The vitamin-A, carotene, fat and moisture concentrations of Nebraska creamery butter were determined at monthly intervals for 25 months. Samples were obtained from 14 creameries located throughout the state. Their vitamin-A and carotene determinations were made with the aid of a spectrophotometer, and their fat and moisture analyses were determined by the A.O.A.C. methods. From a comparison of these data with the results of investigations in other states it was concluded that Nebraska butter was at least equal in vitamin-A value to average United States butter.