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Plant Sciences

1994

Agronomy Notes

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On-Farm Testing Of Early Maturing Soybeans, Larry J. Grabau, Colleen C. Steele, N. Gift Oct 1994

On-Farm Testing Of Early Maturing Soybeans, Larry J. Grabau, Colleen C. Steele, N. Gift

Agronomy Notes

Maturity Group (MG) II soybean varieties have performed well in University of Kentucky tests over the past several years. Six tests from 1986 to 1989 showed MG II varieities to outyield MG I, III, or IV varieties. During those relatively dry years, MG II may have been able to better utilize limited soil moisture than did later maturing varieties. Across the years 1990 to 1993, four planting date tests showed continued strong performance by MG II' varieties, although MG III and IV varieties had slightly higher yield averages during those wetter years. In summary, over the last eight years of …

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An Evaluation Of Twelve Maturity Group Ii Soybean Varieties At Lexington, Kentucky, Larry J. Grabau, Colleen C. Steele Oct 1994

An Evaluation Of Twelve Maturity Group Ii Soybean Varieties At Lexington, Kentucky, Larry J. Grabau, Colleen C. Steele

Agronomy Notes

In 1993, an on-farm study funded. by the Kentucky Soybean Promotion Board showed that the best Maturity Group (MG) II variety tested was quite competitive with the best available MG IV variety. However, other MG II varieties did not fare as well, indicating that careful variety selection will be essential for on-farm success with this MG II cropping system. MG II varieties used in past University of Kentucky tests have been chosen based on their performance in university variety trials where they are normally grown, for example, in Iowa, Illinois, Indiana, and Ohio. Such tests include relatively large numbers of …

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Crude Protein Of Hybrid Corn Varieties Evaluated In The Kentucky Hybrid Corn Performance Tests From 1990 To 1993, C. G. Poneleit, K. O. Evans, Michael Collins, Gary L. Cromwell Jul 1994

Crude Protein Of Hybrid Corn Varieties Evaluated In The Kentucky Hybrid Corn Performance Tests From 1990 To 1993, C. G. Poneleit, K. O. Evans, Michael Collins, Gary L. Cromwell

Agronomy Notes

Grain samples have been collected each year since 1990 from three locations of the Kentucky Hybrid Corn Performance Test and analyzed for crude protein. The objective was to provide an unbiased comparative evaluation of the crude protein content of corn hybrids sold in Kentucky. The results indicate that while management and environment at each test 1ocat i on may have significant influences, crude protein does differ among hybrid genotypes. The feeding value of specific hybrid genotypes based on their protein content may have significant influence in diet formulation for non-ruminant animals owing to the amount of supplement needed to properly …

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Wetlands: Mechanisms For Treating Acid Mine Drainage, David C. Ditsch, Anastasios D. Karathanasis Feb 1994

Wetlands: Mechanisms For Treating Acid Mine Drainage, David C. Ditsch, Anastasios D. Karathanasis

Agronomy Notes

A great deal of attention has been given to wetlands in recent years. Research suggests that natural and/or constructed wetlands may play a valuable role in flood flow moderation, sediment retention and stabilization, and waste water treatment while providing habitat for game and nongame wildlife. Only within the last 10 years have wetlands received serious attention in the treatment of acid mine drainage (AMD).

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1994 Kentucky Bluegrass Variety Test Report, L. M. Lauriault, A. J. Powell, Jimmy C. Henning, Paul B. Burrus Ii, Paul C. Vincelli, Timothy D. Phillips Jan 1994

1994 Kentucky Bluegrass Variety Test Report, L. M. Lauriault, A. J. Powell, Jimmy C. Henning, Paul B. Burrus Ii, Paul C. Vincelli, Timothy D. Phillips

Agronomy Notes

Kentucky bluegrass (Poapratensis) is the third most prominent cool-season grass used in Kentucky for forage, behind tall fescue and orchardgrass. As with all cool-season grasses, Kentucky bluegrass does best in cooler weather, becoming relatively non-productive in hot, dry conditions. It is a high quality, long-lived, rhizomatous grass that is used for both turf and forage. Compared to other cool-season grasses, Kentucky bluegrass is slower to germinate (2-3 weeks) and generally is lower in seedling vigor and herbage yield. Most recent varieties have been developed for turf use. Several have been used in horse pastures even though they were …

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Using Poultry Manure From Layers As A Supplemental Nitrogen Source For Corn, Lloyd W. Murdock, R. Darrell Simpson, Tim Gray Jan 1994

Using Poultry Manure From Layers As A Supplemental Nitrogen Source For Corn, Lloyd W. Murdock, R. Darrell Simpson, Tim Gray

Agronomy Notes

The objectives of this study were to try to find an effective inorganic nitrogen (N) fertilizer rate to apply to a corn crop when poultry manure has been used on the field and to see if an N soil test at sidedress time could help predict the amount of N needed.

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1993 Kentucky Bluegrass Variety Test Report, L. M. Lauriault, A. J. Powell, Timothy D. Phillips, Jimmy C. Henning Jan 1994

1993 Kentucky Bluegrass Variety Test Report, L. M. Lauriault, A. J. Powell, Timothy D. Phillips, Jimmy C. Henning

Agronomy Notes

Kentucky bluegrass (Poa pratensis) is the third most prominent cool-season grass used in Kentucky for, forage, behind tall fescue and orchardgrass. As with all cool-season grasses, Kentucky bluegrass does best in cooler weather, becoming dormant in hot, dry conditions. It is a high quality, long-lived, rhizomatous grass that is used for both turf and forage. Compared to other cool-season grasses, Kentucky bluegrass is slower to germinate (2-3 weeks) and generally is lower in seedling vigor and herbage yield. Most recent varieties of Kentucky bluegrass have been developed for turf use; therefore, primary emphasis has been placed on improving …

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Growth, Yield, And Efficiency Of Potassium Fertilizer Use In Burley Tobacco Production, J. L. Sims, William O. Thom, Kenneth L. Wells, J. D. Clark Jan 1994

Growth, Yield, And Efficiency Of Potassium Fertilizer Use In Burley Tobacco Production, J. L. Sims, William O. Thom, Kenneth L. Wells, J. D. Clark

Agronomy Notes

For many crops, band placement of fertilizer offers agronomic, economic, and environmental advantages over commonly used preplant broadcast applications. Drill banding most of the nitrogen (N) fertilizer 12 inches to both sides of the row for tobacco shortly after transplanting greatly aIleviates manganese toxicity and other nutrient imbalances, improves early growth and yield, and offers increased efficiency of N use. Nitrogen fertilizers applied after transplanting are less likely to be leached during excess rainfall events that commonly occur in April and early May in Kentucky.

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1994 Kentucky Timothy Variety Test Report, L. M. Lauriault, Timothy D. Phillips, Jimmy C. Henning Jan 1994

1994 Kentucky Timothy Variety Test Report, L. M. Lauriault, Timothy D. Phillips, Jimmy C. Henning

Agronomy Notes

Timothy (Phleum pratense) is the fourth most widely sown cool-season perennial grass used in Kentucky for forage, ranking behind tall fescue, orchardgrass, and Kentucky bluegrass. It is a late-maturing bunchgrass that can be used for grazing but is mainly harvested as hay, particularly for horses. For hay production, timothy can be sown with alfalfa or red clover, while white clover or birdsfoot trefoil make good mixtures with timothy for grazing. Management is similar to that for other cool-season grasses. Harvesting at the mid- to late-boot stage is needed to assure good yields and high forage quality. Quality of …

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1993 Kentucky Timothy Variety Test Report, L. M. Lauriault, Timothy D. Phillips, Jimmy C. Henning Jan 1994

1993 Kentucky Timothy Variety Test Report, L. M. Lauriault, Timothy D. Phillips, Jimmy C. Henning

Agronomy Notes

Timothy (Phleum pratense) is the fourth most widely grown cool-season perennial grass used in Kentucky for forage, ranking behind tall fescue, orchardgrass, and Kentucky bluegrass. It is a late maturing bunchgrass that can be used for grazing but is mainly harvested as hay, particularly for horses. Management is similar to that for other cool season-grasses. Harvesting at the proper stage of maturity (mid- to late-boot) is needed to assure high forage quality; otherwise, quality of timothy declines more rapidly than other cool-season grasses as it overmatures. In Kentucky, timothy behaves like a short-lived perennial with stands lasting for …

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