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Legume Identity And Timing Of Incorporation Effects On Soil Responses To Green Manure, Rhonda Graef, Cynthia A. Cambardella, Matthew Z. Liebman Jan 2004

Legume Identity And Timing Of Incorporation Effects On Soil Responses To Green Manure, Rhonda Graef, Cynthia A. Cambardella, Matthew Z. Liebman

Iowa State Research Farm Progress Reports

Challenges to sustainable agriculture include optimizing nitrogen (N) availability, maintaining profitability by reducing input costs, such as synthetic N fertilizers, and minimizing the loss of nitrate-N. Production of a legume green manure in a crop sequence is a typical method used to reduce or eliminate the need for applying synthetic N fertilizer to succeeding crops. Legumes or legume/small grain mixtures are often used as green manures because of the symbiotic association of most legume species with N fixing Rhizobium bacteria. The dynamics of nitrogen (N) mineralization in the soil after legume incorporation are complex. To contribute adequate amounts of ...


Winter Wheat Variety Test, Triticale Variety Test, Ronald Skrdla, Jean-Luc Jannink Jan 2004

Winter Wheat Variety Test, Triticale Variety Test, Ronald Skrdla, Jean-Luc Jannink

Iowa State Research Farm Progress Reports

Includes:

Winter Wheat Variety Test

Triticale Variety Test


Soybean Yield As Influenced By Planting Date And Plant Population, Palle Pedersen Jan 2004

Soybean Yield As Influenced By Planting Date And Plant Population, Palle Pedersen

Iowa State Research Farm Progress Reports

Soybean yields often increase, up to a point, with increasing plant population. However, soybean yield responses to plant population are generally small and often inconsistent. In general, when plant populations are increased, plant height increases and there are greater yield losses from lodging. Soybean seed prices have increased tremendously over the last couple of years. Our hypothesis is that we can reduce our seeding rate cost if we need to replant a field because soils are warmer and seeding mortality lower. The objective of this experiment was to determine the optimum plant population across different planting dates using different tillage ...


Impacts Of Rotation Length, Forage Legume Identity, And Composted Manure On Organic Crop Production, Matthew Z. Liebman, David Haden Jan 2004

Impacts Of Rotation Length, Forage Legume Identity, And Composted Manure On Organic Crop Production, Matthew Z. Liebman, David Haden

Iowa State Research Farm Progress Reports

Since 1990, the American market for organic foods has grown at a rate of 20% per year or more, and is now worth at least $7 billion annually. Price premiums paid to farmers for organically produced crops can increase their value substantially compared with conventionally produced crops. The potential economic advantages for organic production, coupled with increasing concerns about environmental and human health impacts of conventional farming practices, have sparked interest by farmers and researchers in the development of best management practices for organic farming systems.


Transgenic Seed Corn Evaluated For Corn Rootworm Control, James Oleson Jan 2004

Transgenic Seed Corn Evaluated For Corn Rootworm Control, James Oleson

Iowa State Research Farm Progress Reports

The newly labeled YieldGard® Rootworm seed corn (transgenic seed containing a Bt protein) along with two traditional granular insecticides (Force and Aztec) were evaluated for their ability to protect corn root systems from corn rootworm feeding injury. 2003 data from tests conducted at the Kanawha, Nashua, and Crawfordsville farms are presented in this report.


Yield Responses To Winter Application Of Chicken Manure, John D. Holmes, David Rueber Jan 2004

Yield Responses To Winter Application Of Chicken Manure, John D. Holmes, David Rueber

Iowa State Research Farm Progress Reports

An experiment was conducted from 2000–2003 to document yield responses to chicken manure applications made during the winter and spring at two different rates. The focus was on response to nitrogen from manure rather than from phosphorus or potassium.


Farm And Weather Summary, Bernard J. Havlovic Jan 2004

Farm And Weather Summary, Bernard J. Havlovic

Iowa State Research Farm Progress Reports

Includes:

Farm Comments

Crop Season Comments

Weather Comments


Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi, Mark A. Licht Jan 2004

Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi, Mark A. Licht

Iowa State Research Farm Progress Reports

Tillage system and crop rotation significantly affect long-term soil productivity and soil quality components such as soil carbon and other soil physical, biological, and chemical properties. In addition, both tillage and crop rotation affect weed and soil disease control. There is a definite need for well-defined, long-term tillage and crop rotation studies across the different soil and climatic conditions in the state. The objective of this study is to evaluate the long-term effects of different tillage systems and crop rotations on soil productivity.


2002 Leopold Grape Cultivar By Management System Trial, Paul A. Domoto, Gail R. Nonnecke, Bernard J. Havlovic Jan 2004

2002 Leopold Grape Cultivar By Management System Trial, Paul A. Domoto, Gail R. Nonnecke, Bernard J. Havlovic

Iowa State Research Farm Progress Reports

Through a grant from the Leopold Center for Sustainable Agriculture, a grape cultivar by management system trial was established in 2002 at the ISU Horticulture Research Station, Ames, and at the ISU Armstrong Research and Demonstration Farm, Lewis. The trial was designed to evaluate 15 cultivars under three management systems. In 2002, 10 wine cultivars [Maréchal Foch (Foch), Frontenac, Cynthiana (Norton), St.Croix, Chambourcin, Seyval Blanc (Seyval), La Crosse, Vignole, Traminette, Edelweiss], and four seedless table cultivars (Marquis, Vanessa, Reliance, Mars) were planted at the two locations, with the seedless cultivar Jupiter added in 2003.


Specialty Soybean Test—North, Kevin O. Scholbrock Jan 2004

Specialty Soybean Test—North, Kevin O. Scholbrock

Iowa State Research Farm Progress Reports

The purpose of this test is to evaluate the experimental food-type soybean lines adapted to northern Iowa. The 2003 Specialty Test included commodity yellow hilum, large seed, large seed high protein, small seed, and lipoxygenase-free experimental lines, and for comparison of agronomic traits, commercially grown varieties released by Iowa State University. Large seed, large seed high protein, small seed, and lipoxygenase-free soybean varieties grown in Iowa are used to fill a niche in the food-bean market. These soybeans are mainly exported to Japan. Large seed soybeans are used in the production of miso and are consumed as a vegetable. Large ...


Northeast Iowa Agricultural Experimental Association 2003–2004, Northeast Research And Demonstration Farm Jan 2004

Northeast Iowa Agricultural Experimental Association 2003–2004, Northeast Research And Demonstration Farm

Iowa State Research Farm Progress Reports

No abstract provided.


Evaluation Of Wheat Varieties For Certified Organic Production--Neely-Kinyon Trial, 2003, Kathleen Delate, Heather Friedrich, Andrea Mckern, Robert Burcham Jan 2004

Evaluation Of Wheat Varieties For Certified Organic Production--Neely-Kinyon Trial, 2003, Kathleen Delate, Heather Friedrich, Andrea Mckern, Robert Burcham

Iowa State Research Farm Progress Reports

The increasing demand for organic products from consumers has resulted in continuous growth in the organic industry. Organic wheat is an indispensable ingredient in many processed organic products. This variety trial evaluated the production of soft red, hard red, and soft white wheat in southwest Iowa.


Seasonal And Rotational Influences On Corn Nitrogen Requirements, John E. Sawyer, Daniel W. Barker Jan 2004

Seasonal And Rotational Influences On Corn Nitrogen Requirements, John E. Sawyer, Daniel W. Barker

Iowa State Research Farm Progress Reports

This project is designed to study the N fertilization needs in continuous corn (C-C) and corn rotated with soybeans (C-S) as influenced by location and climate. Multiple rates of fertilizer N are spring applied, with the intent to measure yield response to N within each rotation on a yearly basis for multiple years at multiple sites across Iowa. This will allow the determination of N requirements for each rotation practice, differences that exist between the two rotations, and responses to applied N across different soils and climatic conditions. It will also allow for the evaluation of tools used to adjust ...


Demonstration Projects At Sutherland And Doon, Northwest Research Farm And Allee Demonstration Farm Jan 2004

Demonstration Projects At Sutherland And Doon, Northwest Research Farm And Allee Demonstration Farm

Iowa State Research Farm Progress Reports

No abstract provided.


Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi Jan 2004

Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi

Iowa State Research Farm Progress Reports

Tillage system and crop rotation have a significant, long-term affect on soil productivity and soil quality components such as soil carbon and other soil physical, biological, and chemical properties. In addition, both tillage and crop rotation have effects on weed and soil disease control. There is a definite need for well-defined, long-term tillage and crop rotation studies across the different soils and climatic conditions in the state. The objective of this study is to evaluate the long-term effects of different tillage systems and crop rotations on soil productivity.


Seasonal And Rotational Influences On Corn Nitrogen Requirements, John E. Sawyer, Daniel W. Barker, John Lundvall Jan 2004

Seasonal And Rotational Influences On Corn Nitrogen Requirements, John E. Sawyer, Daniel W. Barker, John Lundvall

Iowa State Research Farm Progress Reports

This project is designed to study the N fertilization needs of continuous corn (C-C) and corn rotated with soybeans (C-S) as influenced by location and climate. Multiple rates of fertilizer N are spring applied, with the intent to measure yield response to N within each rotation on a yearly basis for multiple years at multiple sites across Iowa. This will help determine N requirements for each rotational practice, differences that exist between the two rotations, and responses to applied N across different soils and different climatic conditions. It will also allow for the evaluation of tools used to adjust N ...


Long-Term Phosphorus Fertilization For Corn-Soybean Rotations, Antonio P. Mallarino, David Rueber Jan 2004

Long-Term Phosphorus Fertilization For Corn-Soybean Rotations, Antonio P. Mallarino, David Rueber

Iowa State Research Farm Progress Reports

A study was conducted from 1976 to 2002 to evaluate the effect of annual phosphorus (P) fertilization on soil P and yields of corn and soybeans. Both crops were grown each year in a rotation by alternating them between two halves of the area. Cornstalks were chisel-plowed in the fall and disked in the spring. Soybean residue was disked in spring. The Webster soil predominated, and there were small areas of Canisteo. Soil pH varied from 6.0 to 8.2. Less than 15% of the area had a pH of 7.3 or higher (calcareous).


Integration Of Cool- And Warm-Season Grass Pasturing Systems Into Cattle Finishing Programs, M. Peter Hoffman, Roy E. Edler, Tsengeg Purevjav, Kenneth J. Moore, Wayne B. Roush Jan 2004

Integration Of Cool- And Warm-Season Grass Pasturing Systems Into Cattle Finishing Programs, M. Peter Hoffman, Roy E. Edler, Tsengeg Purevjav, Kenneth J. Moore, Wayne B. Roush

Iowa State Research Farm Progress Reports

Previously we reported on a study that demonstrated that fall-born steer calves pastured on bromegrass for either portions of or all of the grazing season and then finished in drylot, significantly outperformed calves placed directly into the feedlot in terms of profit/head at harvest time. Areas consisting of highly productive soils, interdispersed with highly erodable land, are well suited for this kind of production practice and in turn production systems of this nature are quite consistent with the concepts of sustainable agriculture. In an effort to capture more grazing potential, it was decided to incorporate warm-season grasses into the ...


Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi, Mark A. Licht Jan 2004

Effects Of Long-Term Tillage And Crop Rotation On Soil Carbon And Soil Productivity, Mahdi Al-Kaisi, Mark A. Licht

Iowa State Research Farm Progress Reports

Tillage system and crop rotation have a significant long-term affect on soil productivity and soil quality components such as soil carbon and other soil physical, biological, and chemical properties. In addition, both tillage and crop rotation have effects on weed and soil disease control. There is a definite need for well-defined, long-term tillage and crop rotation studies across the different soil and climatic conditions in the state. The objective of this study is to evaluate the long-term effects of different tillage systems and crop rotations on soil productivity.


Population Dynamics Of Corn Flea Beetles And Their Importance For Stewart’S Disease Of Corn, Paul Esker, Forrest W. Nutter Jr. Jan 2004

Population Dynamics Of Corn Flea Beetles And Their Importance For Stewart’S Disease Of Corn, Paul Esker, Forrest W. Nutter Jr.

Iowa State Research Farm Progress Reports

Stewart's disease of corn, caused by the bacterium Pantoea (Erwinia) stewartii, is extremely important for seed and sweet corn producers. Substantial economic losses are possible in both types of production. For the seed corn industry, zero tolerance phytosanitary regulations greatly inhibit the ability of seed corn to be exported from Stewart’s diseaseinfected fields. Management often focuses on the role of the corn flea beetle (Chaetocnema pulicaria) vector that is necessary for both pathogen survival during the winter months and pathogen transmission during the field season. Research on the corn flea beetle is limited, especially in regard to its ...


Weed Management In Corn–I, Michael D. Owen, James F. Lux, Damian D. Franzenburg Jan 2004

Weed Management In Corn–I, Michael D. Owen, James F. Lux, Damian D. Franzenburg

Iowa State Research Farm Progress Reports

The purpose of this study was to evaluate two-pass and single-pass corn herbicide programs for crop phytotoxicity and weed control.


Rotational Grazing Demonstrations With Beef Cows On Crp Land In Adams County, Chris Nelson, Rick Sprague, Russell Bredahl, Brian Peterson, William Bartenhagen, John Klein, Stephen K. Barnhart Jan 2004

Rotational Grazing Demonstrations With Beef Cows On Crp Land In Adams County, Chris Nelson, Rick Sprague, Russell Bredahl, Brian Peterson, William Bartenhagen, John Klein, Stephen K. Barnhart

Iowa State Research Farm Progress Reports

Two grazing systems have been demonstrated annually from 1991–2003 on CRP land near Corning, Iowa. This report summarizes the 2003 production data. A 13-paddock intensive-rotational grazing system and a 4-paddock rotational grazing system were established in 1991 to show economically feasible grass alternatives to row crops and CRP participation on steeply sloping (9–14% slope), highly-erodible land (HEL).


Woolly Cupgrass Control In Corn With Preemergence And Postemergence Applied Herbicides, Michael D. Owen, James F. Lux, Damian D. Franzenburg Jan 2004

Woolly Cupgrass Control In Corn With Preemergence And Postemergence Applied Herbicides, Michael D. Owen, James F. Lux, Damian D. Franzenburg

Iowa State Research Farm Progress Reports

The purpose of this study was to evaluate preemergence and postemergence applied herbicides for crop phytotoxicity and weed management in a glufosinate-tolerant corn.


Information On Experiments In Previous Annual Progress Reports, Armstrong And Neely-Kinyon Research And Demonstration Farms Jan 2004

Information On Experiments In Previous Annual Progress Reports, Armstrong And Neely-Kinyon Research And Demonstration Farms

Iowa State Research Farm Progress Reports

No abstract provided.


Farm And Weather Summary, Kevin Van Dee Jan 2004

Farm And Weather Summary, Kevin Van Dee

Iowa State Research Farm Progress Reports

Includes:

Farm Comments

Crop Season Comments

Weather Comments


Rhodes, Farm And Weather Summary, Timothy R. Goode Jan 2004

Rhodes, Farm And Weather Summary, Timothy R. Goode

Iowa State Research Farm Progress Reports

Includes:

Farm Comments

Crop Season Comments

Weather Comments


Corn Breeding Research, Kendall Lamkey, Arnel R. Hallauer, Paul R. White Jan 2004

Corn Breeding Research, Kendall Lamkey, Arnel R. Hallauer, Paul R. White

Iowa State Research Farm Progress Reports

The Southeast Research Farm (SERF) is an invaluable facility for the cooperative federal-state corn breeding project at ISU. We rely on the facility as one of our main testing locations in the southern part of Iowa. The SERF is one of our largest test sites in the state. Corn breeding research is conducted at the farm by the Lamkey and Hallauer (ISU) projects, the Pollak (USDAARS) project, and the Blanco (USDA-ARS) project. Our research at the farm is funded primarily by the Raymond F. Baker Center for Plant Breeding located at ISU.


Farm And Weather Summary, Agronomy Farm, Michael W. Fiscus Jan 2004

Farm And Weather Summary, Agronomy Farm, Michael W. Fiscus

Iowa State Research Farm Progress Reports

Includes:

Farm Comments

Crop Season Comments

Weather Comments


Evaluation Of Organic Pest Management Treatments For Bean Leaf Beetle--Neely-Kinyon Trial, 2003, Kathleen Delate, Heather Friedrich, Andrea Mckern, Robert Burcham Jan 2004

Evaluation Of Organic Pest Management Treatments For Bean Leaf Beetle--Neely-Kinyon Trial, 2003, Kathleen Delate, Heather Friedrich, Andrea Mckern, Robert Burcham

Iowa State Research Farm Progress Reports

Bean leaf beetles have continued to be a problem for organic tofu soybean producers throughout the Midwest because of the resulting seed staining, which can downgrade the quality of the soybeans at market. Beginning in 2000, we have evaluated organically approved treatments for bean leaf beetle and fungal control.


Acknowledgments, Armstrong And Neely-Kinyon Research And Demonstration Farms Jan 2004

Acknowledgments, Armstrong And Neely-Kinyon Research And Demonstration Farms

Iowa State Research Farm Progress Reports

No abstract provided.