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University of Kentucky

1977

Articles 1 - 10 of 10

Full-Text Articles in Life Sciences

Boron Fertilization Of Corn In Kentucky, Lloyd W. Murdock, Kenneth L. Wells, H. F. Miiller Sep 1977

Boron Fertilization Of Corn In Kentucky, Lloyd W. Murdock, Kenneth L. Wells, H. F. Miiller

Agronomy Notes

The need for use of boron (B) for alfalfa production has been recognized for many years in Kentucky and is presently recommended for general use as an annual topdressing on alfalfa fields. Use of B is also recommended in Kentucky for red clover fields which are to be harvested for seed. In recent years, there has been interest in use of fertilizer B for good corn production in Kentucky. Plant available B is greatly affected by soil pH and decreases with increasing soil pH. Because of this, some states recommend use of B on corn grown on soils with a …

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Manganese Fertilization Of Soybeans, Lloyd W. Murdock, Harold F. Miller, Doyle Peaslee, Wilbur Frye Sep 1977

Manganese Fertilization Of Soybeans, Lloyd W. Murdock, Harold F. Miller, Doyle Peaslee, Wilbur Frye

Agronomy Notes

Only a small quantity of manganese is essential for plant growth however under certain soil conditions even this is not available to the plant. Depending on severity, manganese deficiency will retard plant growth and may drastically decrease yields. A deficiency of manganese will affect the photosynthesis system of the plant. The visual symptoms of a manganese deficiency on soybeans is interveinal chlorosis of the leaves. The veins remains green until the chlorosis nears the white stage then they also lose their color.

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Alfalfa Response To Varying Rates Of Phosphorus And Potassium Fertilization On Deep, Red, Limestone - Derived Soils Of The Pennyroyal Area In Kentucky, H. C. Vaught, Kenneth L. Wells, K. L. Driskill Jun 1977

Alfalfa Response To Varying Rates Of Phosphorus And Potassium Fertilization On Deep, Red, Limestone - Derived Soils Of The Pennyroyal Area In Kentucky, H. C. Vaught, Kenneth L. Wells, K. L. Driskill

Agronomy Notes

The Western Pennyroyal area of Kentucky consists largely of deep, well-drained limestone-derived soils occurring on an undulating to rolling landscape. A thin loess mantle overlies the limestone residuum in many areas. Soils on these landscapes are capable of good crop production, providing the basis of the rather intensive grain-hay- tobacco-livestock farming systems common to the Pennyroyal area. Because of the well-suited physical characteristics of these soils, alfalfa is a very important hay crop to this area.

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Field Tests Of Some Liming Treatments For Growing Burley Tobacco On Acid Soils, A. M. Wallace, Kenneth L. Wells, J. L. Sims, Paul Gray Apr 1977

Field Tests Of Some Liming Treatments For Growing Burley Tobacco On Acid Soils, A. M. Wallace, Kenneth L. Wells, J. L. Sims, Paul Gray

Agronomy Notes

A major problem in the production of tobacco on acid soils in Kentucky is manganese toxicity, despite the fact that it can be easily prevented. Since manganese toxicity is caused by high levels of soil acidity, prevention of soil acidity by liming is the best method of control. And soil testing is the only way to determine how acid a field has become.

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Relationship Between Soil Ph And Yield Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells Mar 1977

Relationship Between Soil Ph And Yield Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells

Agronomy Notes

Historically, use of soil with a pH of 5.6 to 5.8 has been recommended for producing best quality burley tobacco. This recommendation for a relatively low pH resulted from the reported increases in the incidence of certain diseases, notably black root rot (Thielaviopsis basicola) and black shank (Phytophthora parasitica), in soils with pH greater than 5.8. Additionally, some researchers have reported undesirable chemical properties of cured leaf grown on soils that had been limed. However, workers at the Kentucky Agricultural Experiment Station generally have reported favorable effects from use of lime on both yield and quality of tobacco grown in …

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Foliar Fertilization Of Soybeans, Kenneth L. Wells, Dennis B. Egli, C. E. Wyatt, John Kavanaugh Feb 1977

Foliar Fertilization Of Soybeans, Kenneth L. Wells, Dennis B. Egli, C. E. Wyatt, John Kavanaugh

Agronomy Notes

Research reported by Iowa State University during the winter of 1975-76 suggested that a means of increasing soybean yields by use of a specific foliar fertilizer had been demonstrated (1976). Theory proposed to explain the reported responses was as follows: Up to the seed filling period in soybean growth, soybean roots and activity of nitrogen-fixing bacteria contained in root nodules are capable of supplying the necessary nutrients to meet the plants demands. However, as seed filling begins root growth stops and nodule activity declines. This results in nutrients being redistributed from leaves to seeds and a reduction in rate of …

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Effect Of Lime And Source Of Nitrogen Fertilizer On Yield And Chemical Composition Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells Feb 1977

Effect Of Lime And Source Of Nitrogen Fertilizer On Yield And Chemical Composition Of Burley Tobacco, J. L. Sims, W. O. Atkinson, Kenneth L. Wells

Agronomy Notes

Current trends in the fertilizer industry indicate a shift to greater production of ammonium forms of nitrogen fertilizer in comparison to nitrate forms. Reasons for these trends are many, but both economic and energy conservation are major factors. Generally, ammonium forms are produced with less, total energy and have higher nitrogen contents that permits lower production and transportation costs per unit of N. Agronomically, ammonium forms are less readily leached from soils, but produce acid as they are converted to nitrates by soil microorganisms. Thus, ammonium sources of nitrogen have both advantages and disadvantages as fertilizers for crops.

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Vertical Drainage In Field Cores, Larry G. Wells, R. W. Skaggs Jan 1977

Vertical Drainage In Field Cores, Larry G. Wells, R. W. Skaggs

Biosystems and Agricultural Engineering Faculty Publications

No abstract provided.

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Modeling Soil Water Movement Into Plant Roots, D. C. Slack, C. T. Haan, Larry G. Wells Jan 1977

Modeling Soil Water Movement Into Plant Roots, D. C. Slack, C. T. Haan, Larry G. Wells

Biosystems and Agricultural Engineering Faculty Publications

Mathematical model was developed which describes uptake of water by plant roots as a function of leaf and soil water potentials. The model was used to estimate transpiration from corn grown in a controlled environment under soil drying conditions. The model predicted daily transpiration quite well for the period modeled.

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Growth Response Of Kenhy Fescue To Nitrogen Fertilizer, Kenneth L. Wells, Robert C. Buckner, George Armstrong, Paul Gray, C. E. Wyatt Jan 1977

Growth Response Of Kenhy Fescue To Nitrogen Fertilizer, Kenneth L. Wells, Robert C. Buckner, George Armstrong, Paul Gray, C. E. Wyatt

Agronomy Notes

Kenhy fescue is a new, improved variety of tall fescue which has recently been released by the University of Kentucky Agricultural Experiment Station and the U.S.D.A. Agricultural Research Service (see University of Kentucky publication AGR-60, "Kenhy A New Tall Fescue Variety"). Seed of this variety should become available to farmers in limited quantities in the summer 1977. The purpose of this report is to provide information on how this newly developed fescue variety produces as affected by time and rate of nitrogen application.

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