Open Access. Powered by Scholars. Published by Universities.®

Soil Science Commons

Open Access. Powered by Scholars. Published by Universities.®

3,437 Full-Text Articles 3,847 Authors 329,876 Downloads 86 Institutions

All Articles in Soil Science

Faceted Search

3,437 full-text articles. Page 6 of 54.

Determination Of Amino Acids And Nitrates In Soils: Amino Acids, Ammonia And Nitrates In Manured And Limed Soil, R. S. Potter, R. S. Snyder 2017 Iowa State College

Determination Of Amino Acids And Nitrates In Soils: Amino Acids, Ammonia And Nitrates In Manured And Limed Soil, R. S. Potter, R. S. Snyder

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

In view of the fact that no data had ever been obtained on the quantitative relationships of the organic material in the soil by such methods as would preclude a chemical transformation, two things seemed desirable, in continuing the humus investigations at the Iowa Agricultural Experiment Station. First, to attempt the analysis of the organic material of the soil without subjecting it to hydrolysis or other chemical change, and second, to correlate the proportionate quantities of the compounds or classes of compounds found with the kind of soil, its history, treatment, fertility, etc.


Photo Highlights Of The 36th Kentucky Alfalfa And Stored Forages Conference, Kentucky Alfalfa and Stored Forages Conference 2017 University of Kentucky

Photo Highlights Of The 36th Kentucky Alfalfa And Stored Forages Conference, Kentucky Alfalfa And Stored Forages Conference

Kentucky Alfalfa and Stored Forage Conference

No abstract provided.


Kentucky Alfalfa Awards History, Kentucky Alfalfa and Stored Forages Conference 2017 University of Kentucky

Kentucky Alfalfa Awards History, Kentucky Alfalfa And Stored Forages Conference

Kentucky Alfalfa and Stored Forage Conference

The Kentucky Alfalfa Awards Program was initiated in 2000 at the 20th Anniversary of the Kentucky Alfalfa Conference. The Awards Program is funded annually from revenues generated each year for the Silent Auction during the Annual Conference.


Alfalfa Conference Speakers From The Beginning, Kentucky Alfalfa and Stored Forages Conference 2017 University of Kentucky

Alfalfa Conference Speakers From The Beginning, Kentucky Alfalfa And Stored Forages Conference

Kentucky Alfalfa and Stored Forage Conference

No abstract provided.


Save The Date! [Announcement], S. Ray Smith, Krista Lea 2017 University of Kentucky

Save The Date! [Announcement], S. Ray Smith, Krista Lea

Kentucky Alfalfa and Stored Forage Conference

This is an announcement of upcoming events.


Selecting Summer Annual Varieties Using Yield And Digestibility, Christopher D. Teutsch 2017 University of Kentucky

Selecting Summer Annual Varieties Using Yield And Digestibility, Christopher D. Teutsch

Kentucky Alfalfa and Stored Forage Conference

Although cool-season grasses can provide ample and high quality forage for grazing livestock in the spring and fall, forage growth during the summer months is often restricted by high temperatures (Figure 1). In contrast warm-season annual grasses are most productive during the summer months and do not reach peak growth until temperatures approach 90 degrees Fahrenheit. Summer annual grasses such as forage sorghum (Sorghum bicolor (L.) Moench), sudangrass (Sorghum bicolor (L.) Moench), sorghum-sudangrass hybrids, and pearl millet (Pennisetum americanum (L.) Leeke) can provide high quality summer grazing for ruminant livestock in many regions of the United States.


The Economics Of Hay Quality, Madeline L. Dant, Kenneth H. Burdine, Brandon Sears 2017 University of Kentucky

The Economics Of Hay Quality, Madeline L. Dant, Kenneth H. Burdine, Brandon Sears

Kentucky Alfalfa and Stored Forage Conference

Hay quality is often discussed when one considers the viability of cash hay operations. A great deal is known about how production impacts quality and how quality impacts animal performance. This knowledge certainly has economic implications, but the economics of hay quality has primarily been evaluated from the animal performance perspective. Analyzing the economics of hay quality from the cash hay producer’s prospective becomes more difficult due to data limitations.

There are approximately 2.5 million acres of hay produced in Kentucky annually. The vast majority of this hay is grass type hay that is produced and fed on ...


What Is New In Seed Coatings, Bill Talley 2017 Summit Seed Coatings

What Is New In Seed Coatings, Bill Talley

Kentucky Alfalfa and Stored Forage Conference

Seed Coatings started many centuries ago when the Chinese wrapped their rice seed in a mud ball when planting their rice fields. The ball would keep the seed from floating to the top when they flooded their fields. Seed treatment of Alfalfa first began with preinoculation of the seed to make it more convenient to plant. The farmer did not have to go through the process of inoculating the seed himself, and this was a great improvement at the time. In 1975 Ramsey Seed in California acquired technology from a New Zealand company to begin coating seed with a buildup ...


Western Hay Production Vs. Eastern Hay Production, Tom Keene 2017 University of Kentucky

Western Hay Production Vs. Eastern Hay Production, Tom Keene

Kentucky Alfalfa and Stored Forage Conference

Early in the history of mankind, man was nomadic and moved from location to location in order to gather and find sustenance for themselves as well as their livestock. At some point in time, man decided that rather than keep moving, they would establish a community in one location, usually near running water (or fresh water of some kind), and would begin to sustain themselves with production agricultural practices.

Planting and harvesting soon took the place of packing up and moving every time the current resources had been depleted. Each year a new crop would be planted; livestock also became ...


Why Is Intake Reduced When Cattle Are Fed Tall Fescue?, James L. Klotz 2017 US Department of Agriculture

Why Is Intake Reduced When Cattle Are Fed Tall Fescue?, James L. Klotz

Kentucky Alfalfa and Stored Forage Conference

A major problem for the cattle producer that utilizes tall fescue forage is the unrealized or reduced gains in body weight in growing animals. This result has been reproduced across numerous studies evaluating cattle performance on tall fescue (Hoveland et al., 1983; Boling, 1985; Schmidt et al., 1986; Goetsch et al., 1987). Cattle have gained from 30 to 100% less consuming toxic endophyte-infected tall fescue compared to consumption of an endophyte-free tall fescue (Paterson et al., 1995). This effect of reduced gain is a consequence of a fungal endophyte present within the grass that produces toxins called ergot alkaloids. Fungal ...


Understanding And Improving Fermentation In Alfalfa And Grass Baleage, Dennis Hancock 2017 University of Georgia

Understanding And Improving Fermentation In Alfalfa And Grass Baleage, Dennis Hancock

Kentucky Alfalfa and Stored Forage Conference

The ancient Egyptian and Carthaginians are believed to be the first conserve forage by ensiling it in the absence of oxygen. Though the technique has been refined in the 3500 years since, the basic fermentation process has not changed. Populations of naturally-occurring bacteria on the plant surface can consume some of the readily available carbohydrates and produce organic acids. These organic acids lower the pH of the forage material and prevent fungal deterioration of the product. Fermentation has been used for millennia as a natural method for preserving food. Similar bacterial fermentation occurs when one makes yogurt, sour cream, or ...


Hay Making Weather In Kentucky: How To Get Good Information, Matthew Dixon, Tom Priddy 2017 University of Kentucky

Hay Making Weather In Kentucky: How To Get Good Information, Matthew Dixon, Tom Priddy

Kentucky Alfalfa and Stored Forage Conference

The UK Agricultural Weather Center, housed within the Department of Biosystems and Agricultural Engineering, was developed in 1978. As part of the Cooperative Extension Service, the goal of the Ag Weather Center is to minimize weather and climate related surprise for Kentucky residents and their agricultural needs, ultimately for profitable and sustainable production. In doing so, numerous tools and models have been developed throughout the years to further help farmers and producers in management and production related decisions.


Foreword Of Kentucky Alfalfa And Stored Forages Conference [2017], S. Ray Smith, Krista Lea 2017 University of Kentucky

Foreword Of Kentucky Alfalfa And Stored Forages Conference [2017], S. Ray Smith, Krista Lea

Kentucky Alfalfa and Stored Forage Conference

This is the front matter of the proceedings.


Sulfofication In Soils, P. E. Brown, E. H. Kellogg 2017 Iowa State College

Sulfofication In Soils, P. E. Brown, E. H. Kellogg

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Sulfur has long been known to be one of the essential plant food constituents. It has always been believed, however, that there was sufficient present in all soils for the optimum growth of crops. This assumption has been very largely based on Wolff's analyses of the ashes of various crops which showed the presence of very small amounts of sulfur.

The recent work of many investigators has demonstrated, however, that the amount of sulfur in plant materials as determined in the ash is, in most cases, entirely too low; that there is a considerable loss of sulfur in the ...


Bacteriological Studies Of Field Soils, Iii. The Effects Of Barnyard Manure, Percy Edgar Brown 2017 Iowa State College

Bacteriological Studies Of Field Soils, Iii. The Effects Of Barnyard Manure, Percy Edgar Brown

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The conclusions which may be drawn from the experiments upon the effects of barnyard manure on bacteriological activities of field S'oils presented in this bulletin are as follows:

1. Applications of manure up to sixteen tons per acre increased the numbers of organisms in the soil as shown by the growth on modified synthetic and albumen agar. The ammonifying power of the soil as shown by tests with the casein-fresh soil, albumen-fresh soil, dried blood-fresh soil, and dried blood-air-dried soil methods, and the nitrifying power tested by the ammonium sulfate-fresh soil, and the ammonium sulfate-air- dried soil methods were ...


Rapid Surface-Water Volume Estimations In Beaver Ponds, Daniel J. Karran, Cherie J. Westbrook, Joseph M. Wheaton, Carol A. Johnston, Angela Bedard-Haughn 2017 University of Saskatchewan

Rapid Surface-Water Volume Estimations In Beaver Ponds, Daniel J. Karran, Cherie J. Westbrook, Joseph M. Wheaton, Carol A. Johnston, Angela Bedard-Haughn

Watershed Sciences Faculty Publications

Beaver ponds are surface-water features that are transient through space and time. Such qualities complicate the inclusion of beaver ponds in local and regional water balances, and in hydrological models, as reliable estimates of surface-water storage are difficult to acquire without time- and labour-intensive topographic surveys. A simpler approach to overcome this challenge is needed, given the abundance of the beaver ponds in North America, Eurasia, and southern South America. We investigated whether simple morphometric characteristics derived from readily available aerial imagery or quickly measured field attributes of beaver ponds can be used to approximate surface-water storage among the range ...


Methods For The Bacteriological Examination Of Soils, Percy Edgar Brown 2017 Iowa State College

Methods For The Bacteriological Examination Of Soils, Percy Edgar Brown

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Because the idea of examining soils bacteriologically owed its inception to the development of the gelatine plate method for isolating pure cultures, very naturally the first investigations of soil bacteria were by the use of plate cultures. the studies, therefore, were purely quantitative in nature. The results secured by the pioneers in this work demonstrated some facts of considerable interest, but it soon became evident that mere quantitative determinations of the bacteria in soils were inadequate to give information regarding the relation of such organisms and their activities to the fertility of the soil.


Amino Acids And Acid Amides As Sources Of Ammonia In Soils, S. L. Jodidi 2017 Iowa State College

Amino Acids And Acid Amides As Sources Of Ammonia In Soils, S. L. Jodidi

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

l'he nitrogen recognized as one of the most important elements for plants, if not the most necessary, is being studied and discussed by many investigators ana among them the opinion is quite general that there is a considerable difference between the various forms of nitrogen. this is particularly true of soil nitrogen. Wile in some soils the nitrogen is readily ammonified and furter ifled and further oxidized to nitrites and nitrates, it does not undergo those processes in other soils. In other words, soil nitrogen is available or can easily be made available for plants in some cases, in ...


Bacteria At Different Depths In Some Typical Iowa Soils, Percy Edgar Brown 2017 Iowa State College

Bacteria At Different Depths In Some Typical Iowa Soils, Percy Edgar Brown

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

1. In the different soil types, as well as in the same soil under different rotations, the greatest number of organisms occurred at a depth of 4 inches.

2. Bacteria were found in considerable numbers at much lower depths in the loess soil than in the drift soil.

3. There was a more or less gradual decrease in numbers to a depth of 3, 5 and in one case of fifteen feet. No sudden increases were observed even where gains in moisture occurred.

4. The greatest decrease in numbers of organisms occurred within the first 12 inches and in some ...


Bacteriological Studies Of Field Soils, Ii. The Effects Of Continuous Cropping And Various Rotations, Percy Edgar Brown 2017 Iowa State College

Bacteriological Studies Of Field Soils, Ii. The Effects Of Continuous Cropping And Various Rotations, Percy Edgar Brown

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

From a bacteriological study of soil plots under both continuous cropping and various crop rotations, these general conclusions were drawn:

1. The rotation of crops caused the development of greater numbers of organisms in the soil and of greater ammonifying, nitrifying, and nitrogen-fixing power by the soil, than continuous cropping either to corn or to clover.

2. Greater numbers of organisms, greater ammonifying, nitrifying, and nitrogen-fixing powers were found in a soil under a three year rotation of corn, oats, and clover, than in a soil under a two year rotation of corn and oats, or in a soil under ...


Digital Commons powered by bepress