Life Sciences Commons^™

Stamp Out Chickweed And Henbit From Alfalfa, J. W. Herron, Warren C. Thompson

Agronomy Notes

What are chickweed and henbit?

Chickweed and henbit are winter annual weeds that grow during cool weather. The seeds germinate primarily in the fall, and the plants continue to grow and live through the winter. They develop new seeds from April until early summer. Then they die.

Finely Ground Agricultural Limestone Is Available, George D. Corder

Agronomy Notes

Kentucky farmers can purchase a more finely ground limestone than they could 1 year ago.

The Department of Agronomy, Agricultural Experiment Station, University of Kentucky, recommends that agricultural limestone be ground fine enough that at least 45 percent will pass through a 50-mesh screen. This is equivalent to the old recommendation that at least 40 percent pass through a 60-mesh screen.

Recommended Small Grain Varieties, Description, & Planting Dates, S. H. Phillips

Agronomy Notes

No abstract provided.

Summer Annual Grasses - Kentucky, W. H. Stroube

Agronomy Notes

During the summer of 1965 , several varieties of summer annual grasses were seeded at the rate of 10-12 pounds per acre, in rows 3 feet apart, at the Woodford County Farm and at the Western Kentucky Substation. These varieties were replicated four times and harvested three times at each location. Harvest data are reported in the attached table. It should be noted that data from Woodford county are reported in dry matter per acre and that from Princeton in air-dry forage. Previous studies have indicated that yield data from 3-foot rows of this type of material should be multiplied …

Zinc Deficiency In Corn, Harold Miller, Shirley Phillips

Agronomy Notes

Status of Zinc Deficiency

Corn is the only field crop presently grown in Kentucky that has shown zinc-deficiency symptoms and that has definitely given a response to zinc applications. Isolated instances of zinc deficiency have been reported from nearly every area of the state. However, the difficulty appears to be more prevalent in soils of the central Bluegrass and the western Pennyrile regions.

Considerable variation in respect to zinc deficiency has occurred within these regions, characterized by no consistent pattern. Corn producers in these areas particularly should watch this crop closely for deficiency symptoms during the period 4 to 6 …

What Is Good Agricultural Limestone?, George D. Corder

Agronomy Notes

During the 10-year period, 1955- 64, Kentucky farmers used more than 14 million tons of agricultural limestone. The investment in the limestone plus hauling and spreading was in the neighborhood of $45 million. In 1964 alone. Kentucky farmers invested about $7 million in about 2 million tons of limestone.

New Soybean Varieties, J. F. Shane, S. H. Phillips

Agronomy Notes

Several new soybean varieties have been released during the past few months. Many have appeared in the Uniform Soybean Nurseries at Henderson or Fulton as number strains or named varieties. The following abbreviated descriptions may be of help in comparing these newer releases with more widely known material.

Controlling Annual Grasses In Spring Seeded Alfalfa With Eptc, J. F. Freeman

Agronomy Notes

Many Kentucky farmers plan to sow alfalfa in early spring on a prepared seed bed. A main objective is to avoid or reduce most of the damage of alfalfa weevil on the first-year crops . Eptam 6 E sprayed on the prepared seed bed at rate of 2 quarts in 10 to 20 gallons of water per acre and disked in 3-4 inches deep right behind the sprayer usually gives good control of annual grass weeds and some control of broadleaf weeds as well. A second disking, crosswise to the first, is needed for thorough mixing of the herbicide with …

Controlling Chickweed And Henbit In Alfalfa, J. F. Freeman

Agronomy Notes

Chickweed and henbit weeds are bad in alfalfa this fall. DNBP (premerge or Sinox PE) sprayed on infested fields at rate of 1 to 3 qt in 20 to 40 gallons of water per acre may destroy the weeds without harm to the dormant alfalfa. Use the higher rate if chickweed is matted on the ground or if henbit is heavy in the stand. Spray only when the temperature is 55 to 60 degrees or warmer and fair weather is predicted for 12 hours after treatment. The 1-qt rate applied in early fall when chickweed is very small (not until …

Where Is Moly?, A. L. Hatfield

Agronomy Notes

Is moly in hiding or has it gone down the river? Recent tests in Graves County suggest that it is probably just in hiding.

Moly (molybdenum) is of importance to Kentucky farmers because of its unique relation to soil acidity and legume growth. Many other trace or minor elements necessary for plant growth are most available to crops under acid soil conditions. Molybdenum becomes more available as the soil acidity approaches neutrality.

Agronomy Notes, No. 32, S. H. Phillips

Agronomy Notes

Silo Fillers Disease, caused by nitrogen dioxide, was discussed in a joint Agronomy and Pharmacology release. Dr. Mark Luckens, College of Pharmacy, has prepared strips of potassium iodide - starch test paper to assist in detecting this deadly gas in silos and feeding areas. These strips are small (5/8" x - 2") and change to a blue color when in contact with nitrogen dioxide. We have 300 strips available for use by County Agents.

Agricultural Limestone In Kentucky, George D. Corder

Agronomy Notes

Kentucky farmers invested about $6 million in agricultural limestone in 1964. However, much more lime than this should have been used if farmers get the most economical crop production and the most efficient use of fertilizers that are applied or the fertility that is already in the soil.

Small Grain Planting Information, S. H. Phillips

Agronomy Notes

No abstract provided.

Topdress Alfalfa This Fall, George D. Corder

Agronomy Notes

Good stands of alfalfa should be fertilized even though the alfalfa weevil is causing some concern. This fall, say after the last harvest, is a good time to topdress with phosphate, potash and boron fertilizers.

Soil Test Summary For 1964 Now Available, Harold F. Miller

Agronomy Notes

The number of soil samples tested in soil testing laboratories under the supervision of the College of Agriculture in 1964 showed an increase of 6,028 samples. In 1963, 46,444 samples were tested compared to 52,472 in 1964. These figures do not include the thousands of samples tested in commercial laboratories.

Soil Surveys In Kentucky, Harry Hudson Bailey

Agronomy Notes

Twenty-two Kentucky counties have been surveyed and published using the classification scheme of the U.S. Department of Agriculture. These counties and the dates of the field survey are: Adair (1961), Bath (1959), Calloway (1937), Christian (1912), Clark (1961), Fayette (1931), Fulton (1961), Garrard (1921), Graves (1941), Jessamine (1915), Logan (1919), McCracken (1905), Madison (1905), Marshall (1938), Mason (1903), Mercer (1930), Muhlenberg (1920), Rockcastle (1910), Scott (1903), Shelby (1916), Union (1902), Warren (1904). The maps and reports on Adair, Bath, Calloway, Clark, Fulton, Graves, Logan, Marshall and Mercer Counties are still available (1965) through: Agronomy Department, University of Kentucky, Lexington. The …

Forage Sorghums, W. H. Stroube

Agronomy Notes

Wide interest and publicity relative to summer annual grasses has developed with the release, availability and publicity of forage "sorghum-sudan hybrids."

There are many varieties of sorghum-sudan crosses and similar materials currently on the market making intelligent recommendations concerning specific varieties most difficult. Our experience and that of workers in some other states indicate that most of these varieties behave somewhat similarly. One of the best ways to choose a variety in this case, is to buy a variety that you or a neighbor have had favorable experience with and buy from a known reputable dealer.

Agronomy Notes, No. 35, Robert C. Buckner, Paul B. Burrus Jr.

Agronomy Notes

The following table gives the effect of clipping and fertilization treatments on clean seed yields of tall fescue. Seed yield figures are averages of four replications and five years' data.

Practices To Increase Grass Seed Yields Ky. 31 Fescue, Orchardgrass And Ky. Bluegrass, Robert C. Buckner, Paul B. Burrus Jr.

Agronomy Notes

Grass seed is a specialized crop in Kentucky. High per acre seed yields can be obtained by using the following suggestions that are made from research findings by the University of Kentucky Agronomy Department.

Different Soils Need Different Amounts Of Limestone, George D. Corder

Agronomy Notes

Two different soil types may show the same acidity levels by soil test but they may need different amounts of limestone to obtain the same reduction in soil acidity.

Nitrogen Loss From Surface Application, Harold F. Miller

Agronomy Notes

Research work has shown that considerable nitrogen can be lost from surface applied ammonia-containing fertilizers. The nitrogen is lost due to the formation of ammonia which escapes into the air. Soil and weather conditions encouraging this loss are high temperature, moist soils, high pH and source of nitrogen.

Preserve And Use Tobacco Stalks, George D. Corder

Agronomy Notes

When Kentucky's 1964 tobacco crop is stripped , there will be about 176,000 tons of stalks in and around stripping barns. There will be more than $2 million worth of nitrogen, phosphorus and potassium in them.

If these stalks are left outside the barn and exposed to winter rains, 61 percent of the nitrogen, 38 percent of the phosphorus, 83 percent of the potassium and 41 percent of the organic matter may be lost.

Use Of Phosphate Fertilizers And Bedding To Preserve Manures, George D. Corder

Agronomy Notes

Superphosphate fertilizers added to farm manures as they accumulate in barns, feed lots, and loafing areas will reduce the loss of nitrogen as gaseous ammonia.

Farm Manures, George D. Corder

Agronomy Notes

More than 16 million tons of farm manures valued at more than $47 million are produced on Kentucky farms each year.

Almost half of these manures accumulate in barns, feedlots, and loafing areas. A large part of this will accumulate in these areas between now and pasture time next spring. These manures must be removed from time to time and the cost of handling is unavoidable. Preserving their value and using them wisely on crops and soils that benefit from them will give a fair return on handling costs.

Agronomy Notes, No. 19, George D. Corder

Agronomy Notes

A Test Ban Treaty designed to stop nuclear explosions above ground was signed. World tension was eased. Fear of radioactive fallout was lessened. The Chinese have the atomic bomb. They did not sign the Test Ban Treaty. World tension is on the up-swing.

What has all this to do with agriculture in Kentucky?

Borax, Borates, And Other Boron-Carrying Compounds, Harold F. Miller

Agronomy Notes

Boron is available on the market in a number of different compounds. Since the amount of boron contained in each compound is different, the concentration will determine the rate required per acre. Frequently, all of these boron-containing compounds are erroneously referred to as borax (11.36 percent boron).

Organic Toxicity, Jones H. Smiley, Ira E. Massie

Agronomy Notes

In recent years there has been much discussion on the subject of organic matter toxicity and its relation to the severity of black root rot of tobacco. Organic matter toxicity is due to or at least related to toxins produced during organic matter decomposition.

Fertilizer-Insecticide Mixtures On Corn, R. L. Miller, George D. Corder

Agronomy Notes

Soil fertility and insects are major factors that affect corn yields. The proper kinds and amounts of fertilizers and insecticides properly placed will make corn production more economical on fields where either or both are needed.

Fertilizer-Insecticide Mixtures On Tobacco Plant Beds And Fields, George D. Corder, R. L. Miller

Agronomy Notes

Fertility and insect control programs have a major influence on tobacco production. The proper amounts and kinds of fertilizers and insecticides properly placed will make production more economical on beds and fields if either or both are needed.

Is a fertilizer-insecticide mix the best way to meet the fertility needs and t he insecticide needs on tobacco? The following questions and answers should help show how the decision was reached that this method is not recommended.

Spring And Summer Management Of Forage Crops, Warren C. Thompson

Agronomy Notes

The late summer and early fall drought affected forage crops throughout the state. What can be done this spring and summer about the situation?