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On-Farm Soybean Row Spacing Trials, Jim Fawcett, Josh Sievers, Lyle Rossiter, Jim Rogers Jan 2015

On-Farm Soybean Row Spacing Trials, Jim Fawcett, Josh Sievers, Lyle Rossiter, Jim Rogers

Iowa State Research Farm Progress Reports

Most past research has shown a yield benefit to planting soybeans in rows more narrow than 30-in. However, narrow rows occasionally can result in more soybean disease problems, such as white mold, which can result in higher yields with wider rows. Yield differences between wide and narrow rows often vary from year-to-year and fieldto-field.


On-Farm Corn Row Spacing Trials, Jim Fawcett, Mark Licht, Josh Sievers, Jim Rogers Jan 2015

On-Farm Corn Row Spacing Trials, Jim Fawcett, Mark Licht, Josh Sievers, Jim Rogers

Iowa State Research Farm Progress Reports

Over the past several decades there has been a shift in corn row spacing from the traditional 40-in. rows that were needed so horses could fit between the rows, to 38-in., 36-in., and the most popular 30-in. rows. The narrow row spacing usually has resulted in increased yields due to it allowing more space between the plants within the row. More recently there has been interest in seeing if a narrower row spacing (15-in. or 20-in.) will further increase corn yield.


Preplant And Postemergence Herbicide Programs For Weed Control In No-Till Soybean, Micheal Owen, Damian Franzenburg, James Lee, Jacob Eeling Jan 2015

Preplant And Postemergence Herbicide Programs For Weed Control In No-Till Soybean, Micheal Owen, Damian Franzenburg, James Lee, Jacob Eeling

Iowa State Research Farm Progress Reports

The purpose of this study was to evaluate various herbicides applied early pre-plant in no-till soybean for crop injury and weed control.


On-Farm Soybean Seed Treatment Trials, Jim Fawcett, Zack Koopman, Lance Miller, Wayne Roush, Josh Sievers Jan 2015

On-Farm Soybean Seed Treatment Trials, Jim Fawcett, Zack Koopman, Lance Miller, Wayne Roush, Josh Sievers

Iowa State Research Farm Progress Reports

Seed treatments offer protection from fungi, insects, and nematodes to germinating seeds and developing seedlings. All legumes require the appropriate rhizobium bacteria in the soil in order for nitrogen fixation to occur. Inoculating the seed with an inoculum can insure the crop can take advantage of this nitrogen fixation.


Evaluation Of Foliar Fungicides And Insecticides On Soybeans In Northeast Iowa, Daren Mueller, Stith Wiggs, Warren Pierson Jan 2015

Evaluation Of Foliar Fungicides And Insecticides On Soybeans In Northeast Iowa, Daren Mueller, Stith Wiggs, Warren Pierson

Iowa State Research Farm Progress Reports

Researchers at Iowa State University assessed fungicide and insecticide applications to soybeans at seven locations across Iowa including the Northwest Farm (Sutherland), Northern Farm (Kanawha), Northeast Farm (Nashua), Agronomy Farm (Boone), Armstrong Farm (Lewis), McNay Farm (Chariton), and Southeast Farm (Crawfordsville) (Figure 1).


On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel Jan 2015

On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel

Iowa State Research Farm Progress Reports

Fungicide applications have become more popular among soybean farmers in recent years. The primary use of fungicides has been to control diseases such as Septoria brown spot, Cercospora leaf blight, and frogeye leaf spot. With lower grain prices, the chances of getting an economic benefit from fungicide applications have decreased.


Corn And Soybean Yield Response To Micronutrients In Southwest Iowa, Antonio Mallarino, Mazhar Haq, Joshua Enderson, Ryan Oltmans, Bernie Havlovic Jan 2015

Corn And Soybean Yield Response To Micronutrients In Southwest Iowa, Antonio Mallarino, Mazhar Haq, Joshua Enderson, Ryan Oltmans, Bernie Havlovic

Iowa State Research Farm Progress Reports

Micronutrients are needed in very small amounts but are essential for crop growth. Prior research in Iowa and neighboring states showed inconsistent corn and soybean grain yield responses to fertilization with micronutrients, except for zinc in corn. This report summarizes results of two studies with corn and soybean, one with application to the soil and the other with application to foliage, which were conducted at this farm from 2012 through 2014. The micronutrients evaluated were boron (B), copper (Cu), manganese (Mn), and zinc (Zn).


Southeast Research Farm Summary, Myron Rees Jan 2015

Southeast Research Farm Summary, Myron Rees

Iowa State Research Farm Progress Reports

Contains the Farm and Weather Summary for the Southeast Research and Demonstration Farm.


Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams Jan 2015

Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was initiated in September 2014 as part of the NTEP program. This is the first year data were collected. It contains 20 bentgrass cultivars.


On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel Jan 2015

On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel

Iowa State Research Farm Progress Reports

Fungicide applications have become more popular among soybean farmers in recent years. The primary use of fungicides has been to control diseases such as Septoria brown spot, Cercospora leaf blight, and frogeye leaf spot. With lower grain prices, the chances of getting an economic benefit from fungicide applications have decreased.


Northern Research Farm Summary, Micah Smidt Jan 2015

Northern Research Farm Summary, Micah Smidt

Iowa State Research Farm Progress Reports

Contains the Farm and Weather Summary of the Northern Research and Demonstration Farm.


Long-Term Tillage And Crop Rotation Effects On Soil Carbon And Soil Productivity In Central Iowa, Mahdi Al-Kaisi, David Kwaw-Mensah Jan 2015

Long-Term Tillage And Crop Rotation Effects On Soil Carbon And Soil Productivity In Central Iowa, Mahdi Al-Kaisi, David Kwaw-Mensah

Iowa State Research Farm Progress Reports

Tillage system and crop rotation have a significant long-term effect 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 need for a well-defined, long-term tillage and crop rotation study across the different soils and climate conditions in the state. The objective of this study was to evaluate the long-term effects of different tillage systems and crop rotations on soil productivity.


On-Farm Sulfur Fertilization Of Corn And Soybean Trials, Jim Fawcett, John Sawyer, Lance Miller, Jim Rogers, Wayne Roush Jan 2015

On-Farm Sulfur Fertilization Of Corn And Soybean Trials, Jim Fawcett, John Sawyer, Lance Miller, Jim Rogers, Wayne Roush

Iowa State Research Farm Progress Reports

In the past several years, sulfur (S) deficiency has been showing up more frequently in Iowa fields. This has been especially true in corn and alfalfa fields of northeast Iowa. This is thought to be partially due to Iowa receiving less S in the rainfall due to more stringent air pollution regulations, less S fertilizer applications, and less widespread use of manure. Sulfur fertilizer applications can offer yield increases when S deficiencies are present. The objective of these trials was to evaluate potential for S deficiency and grain yield response in corn and soybean to S applications.


On-Farm Soybean Seed Treatment Trials, Jim Fawcett, Zack Koopman, Lance Miller, Wayne Roush, Josh Sievers Jan 2015

On-Farm Soybean Seed Treatment Trials, Jim Fawcett, Zack Koopman, Lance Miller, Wayne Roush, Josh Sievers

Iowa State Research Farm Progress Reports

Seed treatments offer protection from fungi, insects, and nematodes to germinating seeds and developing seedlings. All legumes require the appropriate rhizobium bacteria in the soil in order for nitrogen fixation to occur. Inoculating the seed with an inoculum can insure the crop can take advantage of this nitrogen fixation.


In-Season N Fertilization Strategies Using Active Sensors, Daniel Barker, John Sawyer Jan 2015

In-Season N Fertilization Strategies Using Active Sensors, Daniel Barker, John Sawyer

Iowa State Research Farm Progress Reports

The objectives of this project were to measure corn yield response to applied nitrogen (N) fertilizer based on active canopy sensing during the mid-vegetative corn growth stage (V10) and compare yield and N use efficiency between pre-plant N (PP-N), pre-plant + sensor N (PP+S-N), split N strategy (SNS), and rescue N strategy (RNS).


On-Farm Corn Rootworm Trials, Jim Fawcett, Zack Koopman, Wayne Roush, Josh Sievers Jan 2015

On-Farm Corn Rootworm Trials, Jim Fawcett, Zack Koopman, Wayne Roush, Josh Sievers

Iowa State Research Farm Progress Reports

There are several methods to manage corn rootworms, including crop rotation, rootworm insecticides, and corn rootworm (CRW) transgenic traits. The use of CRW transgenic traits in corn hybrids has allowed farmers to manage CRW without using soil-applied insecticides. However, rootworm populations resistant to the transgenic traits have been confirmed in Iowa, leading some farmers to see if there is an economic return by adding an insecticide when planting CRW-Bt corn. There also are several transgenic traits now available for corn rootworm control on the market. On-farm trials allow farmers to see how these traits perform on their farms in side-by-side ...


Use By Honeybees Of Flowering Resources In And Around Corn Fields, Mary Harris, Reid Palmer, Joel Coats Jan 2015

Use By Honeybees Of Flowering Resources In And Around Corn Fields, Mary Harris, Reid Palmer, Joel Coats

Iowa State Research Farm Progress Reports

Corn seeds and seedlings are susceptible to attack by several early-season insect pests. Seed treatments have emerged as a means of reducing these insects. Seed-adhered insecticides include members of the class of chemicals referred to as neonicotinoids, which have been demonstrated to adversely affect honeybees. Pollen and nectar that foraging bees collect may be contaminated with neonicotinoids via direct spray, by plant translocation following treatment, and by contaminated dust generated during treatedseed planting.


Developing Hybrid Aspen As A Complementary Energy Crop, Richard Hall, Jesse Randall Jan 2015

Developing Hybrid Aspen As A Complementary Energy Crop, Richard Hall, Jesse Randall

Iowa State Research Farm Progress Reports

Our objective is to develop hybrid aspens as an energy crop that would fit as one part of systems for biomass energy production in the Corn Belt. Most liquid fuels are derived from biomass from cornstarch and cellulose. An additional perennial energy crop coming from in-field buffer strips and windbreaks could contribute to soil conservation, improvement in water quality, year-round harvesting with reduced need for storage of feedstock, and reduced energy and financial inputs. Wood biomass has about twice the energy density and therefore can be economically transported further to a conversion site. Woody biomass is the preferred feedstock for ...


Effectiveness Of Foliar Fungicides By Timing On Northern Leaf Blight On Hybrid Corn In Northern Iowa, Alison Robertson, John Shriver, Micah Smidt Jan 2015

Effectiveness Of Foliar Fungicides By Timing On Northern Leaf Blight On Hybrid Corn In Northern Iowa, Alison Robertson, John Shriver, Micah Smidt

Iowa State Research Farm Progress Reports

Fungicide use on hybrid corn has increased considerably, primarily due to reports of increased yields, even in the absence of disease and higher corn prices. A number of fungicides are registered for use on corn. The objectives of this project were to 1) assess the effect of timing of application of fungicides on disease, 2) evaluate the yield response of hybrid corn to foliar fungicide application, and 3) discern differences, if any, between fungicide products.


Strip-Tillage And Row Cover Use In Organically And Conventionally Grown Summer Squash, Jennifer Tillman, Ajay Nair, Jean Batzer, Mark Gleason Jan 2015

Strip-Tillage And Row Cover Use In Organically And Conventionally Grown Summer Squash, Jennifer Tillman, Ajay Nair, Jean Batzer, Mark Gleason

Iowa State Research Farm Progress Reports

Sustainable production of summer squash involves multiple management practices. Some cover crops can be “rolled” when mature to produce a ground-covering mat. The cash crop is then planted in tilled strips made in the residue. This “strip-tillage” technique provides a weed-controlling, moistureretaining mat that is biodegradable, unlike plastic mulches. The reduction in tillage can improve soil health. Row covers provide a favorable microclimate and act as a physical barrier to pests when placed over young transplants. This can help plants grow more rapidly and reduce diseases spread by insects early in the season, such as yellow vine decline and bacterial ...


On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel Jan 2015

On-Farm Soybean Fungicide Trials, Jim Fawcett, Lance Miller, Lyle Rossiter, Wayne Roush, Josh Sievers, Micah Smidt, Matt Schnabel

Iowa State Research Farm Progress Reports

Fungicide applications have become more popular among soybean farmers in recent years. The primary use of fungicides has been to control diseases such as Septoria brown spot, Cercospora leaf blight, and frogeye leaf spot. With lower grain prices, the chances of getting an economic benefit from fungicide applications have decreased.


On-Farm Corn And Soybean Management Trials, Jim Fawcett, Josh Sievers, Wayne Roush Jan 2015

On-Farm Corn And Soybean Management Trials, Jim Fawcett, Josh Sievers, Wayne Roush

Iowa State Research Farm Progress Reports

Farmers are faced with many decisions in managing corn and soybeans as new technologies are introduced, such as droughttolerant corn hybrids, air reels for combines, and land-rolling equipment. Land rolling is the practice of pulling a large, heavy roller across soybean fields in order to push down rocks, smooth the surface of the field, and help break up residue. The purpose is to protect harvest equipment that could be vulnerable to rocks and corn roots. Yields are expected to improve by creating a more uniform harvest.


On-Farm Corn Population Trials, Jim Fawcett, Lyle Rossiter, Wayne Roush, Zack Koopman Jan 2015

On-Farm Corn Population Trials, Jim Fawcett, Lyle Rossiter, Wayne Roush, Zack Koopman

Iowa State Research Farm Progress Reports

Farmers continue to increase corn planting populations in hopes of increasing yields. Planting too high of a population can result in increased barrenness and thus lower yields, but too low of a population also can result in lower yields. As seed prices continue to rise, it is important for farmers to find a population that maximizes both yield and profit.


Corn And Soybean Yield Response To Micronutrients In Central Iowa, Antonio Mallarino, Mazhar Haq, Joshua Enderson, Ryan Oltmans, Mike Fiscus Jan 2015

Corn And Soybean Yield Response To Micronutrients In Central Iowa, Antonio Mallarino, Mazhar Haq, Joshua Enderson, Ryan Oltmans, Mike Fiscus

Iowa State Research Farm Progress Reports

Plant nutrients referred to as micronutrients are essential for crops, but are needed in very small amounts. Prior research in Iowa and neighboring states showed inconsistent corn and soybean grain yield responses to micronutrient applications, except for Zn in corn. This report summarizes results of two studies with corn and soybean, one with application to the soil and the other with application to foliage, which were conducted from 2012 through 2014. The micronutrients evaluated were boron (B), copper (Cu), manganese (Mn), and zinc (Zn).


Effectiveness Of Foliar Fungicides By Timing On Northern Leaf Blight And Common Rust On Hybrid Corn, Alison Robertson, Josh Sievers, Chad Huffman Jan 2015

Effectiveness Of Foliar Fungicides By Timing On Northern Leaf Blight And Common Rust On Hybrid Corn, Alison Robertson, Josh Sievers, Chad Huffman

Iowa State Research Farm Progress Reports

Fungicide use on hybrid corn has increased considerably, primarily due to reports of increased yields, even in the absence of disease and higher corn prices. A number of fungicides are registered for use on corn. The objectives of this project were to 1) assess the effect of timing of application of fungicides on disease, 2) evaluate the yield response of hybrid corn to foliar fungicide application, and 3) discern differences, if any, between fungicide products.


Fifth Year Performance Of Honeycrisp Grafted On 31 Dwarfing Rootstocks Of The Nc-140 2010 Regional Apple Rootstock Trial, Diana Cochran, Paul Domoto, Lynn Schroeder Jan 2015

Fifth Year Performance Of Honeycrisp Grafted On 31 Dwarfing Rootstocks Of The Nc-140 2010 Regional Apple Rootstock Trial, Diana Cochran, Paul Domoto, Lynn Schroeder

Iowa State Research Farm Progress Reports

Dwarfing rootstocks have the potential to increase profitability of tree-fruit growers by providing smaller trees suitable for highdensity plantings. Although the initial installation cost can be 10 to 30 times greater than lower-density plantings, the long-range returns can far exceed the traditional plantings. However, to be viable as a commercial rootstock, dwarfing rootstocks must be adapted to a range of agro-climatic conditions, moderately disease resistant, high yielding, and produce quality fruit.


Midwest Suction Trap Network, Doris Lagos-Kutz, David Voegtlin Jan 2015

Midwest Suction Trap Network, Doris Lagos-Kutz, David Voegtlin

Iowa State Research Farm Progress Reports

The Midwest Suction Trap Network was described in some detail in an earlier report from the Iowa State University Northeast Research and Demonstration Farm. This report is available online at: http://www.ag.iastate.edu/farms/10reports/Northeast/SuctionTrapNetwork.pdf. The Network has continued through the 2014 growing season with support from the North Central Soybean Research Program and soybean research programs from most of the Midwestern states. Currently, there is no funding to continue operating this network of suction traps, although a proposal to keep it operating for another three years has been submitted.


Mcnay Memorial Research And Demonstration Farm Summary, Nick Piekema, Kevin Maher Jan 2015

Mcnay Memorial Research And Demonstration Farm Summary, Nick Piekema, Kevin Maher

Iowa State Research Farm Progress Reports

Contains the Farm and Weather Summary for the McNay Memorial Research and Demonstration Farm.


Horticulture Enterprise Management (Hort/Ag Eds 465)–Year Review, Leah Riesselman, Gail Nonnecke Jan 2015

Horticulture Enterprise Management (Hort/Ag Eds 465)–Year Review, Leah Riesselman, Gail Nonnecke

Iowa State Research Farm Progress Reports

Originally introduced in the spring of 2011, the cross-listed Hort/Ag EdS 465 course was reintroduced Spring 2014 to the horticulture curriculum at Iowa State University. Modeled after the Ag 450 farm, the purpose of Hort/Ag EdS 465 is to provide students with the experience in managing a horticultural farm and to engage students in active learning of running a horticulture enterprise.


Diesel Fuel Consumption During Field Operations, H. Mark Hanna, Dana Schweitzer Jan 2015

Diesel Fuel Consumption During Field Operations, H. Mark Hanna, Dana Schweitzer

Iowa State Research Farm Progress Reports

Direct energy expenses (diesel, gasoline, propane, electricity) total more than $1 billion annually for Iowa’s farmers. Day-to-day farm management techniques such as adjusting tractor gear and throttle settings or monitoring tractor tire inflation pressures can reduce diesel fuel consumption for row crop production. This study is being conducted over multiple years to measure the effects of energy management techniques on tractor fuel consumption during field operations.