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The Source Matters For Getting The Most Out Of Aerial Imagery, Matthew J. Darr, Zachery S. Vanderleest, Ryan William Bergman, Christopher J. Murphy Mar 2016

The Source Matters For Getting The Most Out Of Aerial Imagery, Matthew J. Darr, Zachery S. Vanderleest, Ryan William Bergman, Christopher J. Murphy

Integrated Crop Management News

As spring plans are finalized, don’t forget to consider aerial imaging as part of a continuous improvement plan. Remote sensing and the use of aerial imagery has been used for decades in agriculture but since 2010 we’ve seen the number of available imagery providers grow extensively. The use of imagery can vary from farm to farm but several common uses include variable rate fertility recommendations, assessing water management performance, quantifying soil compaction and machinery induced yield limiters, locating late season weed outbreaks, and generally evaluating the consistency of crop vigor across a field.


Selecting Nozzles For Postemergence Herbicides, Robert G. Hartzler, H. Mark Hanna Feb 2016

Selecting Nozzles For Postemergence Herbicides, Robert G. Hartzler, H. Mark Hanna

Integrated Crop Management News

An earlier ICM News article discussing affects of nozzle type and size on spray coverage prompted a question from a farmer regarding nozzle selection. In recent years there have been many advances in nozzle design. The primary improvement has been development of nozzles that minimize the formation of driftable droplets (< 200 micron) while still producing a droplet spectrum that provides the level of coverage required for consistent, postemergence weed control.


Spray Volume Is Critical For Postemergence Herbicides, Robert G. Hartzler, H. Mark Hanna Feb 2016

Spray Volume Is Critical For Postemergence Herbicides, Robert G. Hartzler, H. Mark Hanna

Integrated Crop Management News

Proper herbicide application is critical to ensure products achieve their full potential for weed control. For postemergence herbicides, this includes application to appropriately sized weeds and equipping the sprayer to achieve uniform coverage of target weeds. Weed scientists at Purdue University recently reported on the influence of nozzle type and spray volume on target coverage within the soybean canopy. A traditional flat fan (XR) nozzle and three drift reduction nozzles were included in the study. The XR nozzle produced more driftable droplets than the other nozzles, and the two types of air induction nozzles had much less volume in small ...


Nation’S Premier Site For Water Quality Drives Progress, Matt J. Helmers Jan 2016

Nation’S Premier Site For Water Quality Drives Progress, Matt J. Helmers

Integrated Crop Management News

A farm just outside the north-central Iowa town is home to Iowa State University’s Agriculture Drainage Research and Demonstration Site, a facility that has been working to further Iowa State University’s water conservation efforts since 1990. The site was born out of the Iowa Groundwater Protection Act, a piece of legislation passed in 1987 that generated funds from fees on pesticide manufacturing registrations, pesticide dealer licensing and a tax on fertilizer sales. A portion of the funds were used to create the 11-acre research site, with Iowa State University partnering with the Iowa Department of Agriculture and Land ...


Ag Chemical Dealer Update Meetings Provide Timely Crop Production Information, Brent A. Pringnitz Oct 2015

Ag Chemical Dealer Update Meetings Provide Timely Crop Production Information, Brent A. Pringnitz

Integrated Crop Management News

Updates on the latest crop production products and recommendations are the featured topics at meetings sponsored by Iowa State University Extension and Outreach in Iowa City on Nov. 24 and in Ames on Dec. 16. These meetings are an excellent opportunity for ag input providers to meet with extension specialists to review current research, discuss new products and learn of new recommendations.


What A Difference The Weather Makes, Charles R. Hurburgh Oct 2015

What A Difference The Weather Makes, Charles R. Hurburgh

Integrated Crop Management News

A few weeks ago a cool and wet long range forecast meant that large volumes of wet grains would be coming out of the field, at highly variable quality. Well, that did not happen. Warm temperatures and low dewpoints (dry air) since Labor Day have completely changed the crop quality picture. While there are still instances of wet grain and areas with delayed harvest from early September rains, overall the Iowa corn and soybean crops have had a marked reversal from what we anticipated.


Pay Attention To Stored Grain, Charles R. Hurburgh Mar 2015

Pay Attention To Stored Grain, Charles R. Hurburgh

Integrated Crop Management News

The first significant warmup of the year should be a reminder to check stored grain frequently. If good practices were followed through the fall and winter seasons, grain temperatures should be in the 30s or below. Grain moistures last fall were above average, and there are many bins with corn moistures in the range of 16-20%. This wetter grain will spoil quickly if grain temperatures rise.


Pay Attention To Stewardship Requirements For Biotech Grains, Charles R. Hurburgh Oct 2014

Pay Attention To Stewardship Requirements For Biotech Grains, Charles R. Hurburgh

Integrated Crop Management News

Most of us have been following developments in biotechnology approval for many years. The most recent issue is the non-approval of certain corn events by China. Viptera (MIR162) corn has not been approved there since its introduction in 2010; Duracade, new this year, is in the same situation. The greatest impact of the Chinese situation is on distillers grains from ethanol production. China is a major importer of dried distillers grains with solubles (DDGS); much less so for whole corn.


Mycotoxins Videos Released, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers Oct 2014

Mycotoxins Videos Released, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers

Integrated Crop Management News

For a more in-depth discussion and overview of mycotoxins, the Grain Quality Initiative and the Crop Advisor Institutehave prepared two video modules, Mycotoxins in Feed and Grain Industries.


Update On 2014 Crop Quality, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers Oct 2014

Update On 2014 Crop Quality, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers

Integrated Crop Management News

It seems like a broken record...weather changes have shifted expectations of new crop corn quality. Three weeks ago, somewhat wetter corn than normal but high quality was the forecast. It is clear that the wetter part will come true; early harvest moistures are generally coming in at 18 – 22 percent, which is above average but not high enough to cause severe complications in drying. Field drydown is probably nearly over so do not expect much change in moisture from here on.


July Spray Applications, Clarke Mcgrath, H. Mark Hanna Jul 2014

July Spray Applications, Clarke Mcgrath, H. Mark Hanna

Integrated Crop Management News

Applicators using ground sprayers for herbicide may be using higher speeds to catch up with weeds and cover more acres in a narrow time window. If so, they should consider the travel speed they've used to calculate appropriate nozzle size. If field speed increases by 25% (e.g., going from 12 to 15 mi/h), spray pressure for a given nozzle must increase by 56% (e.g., from 40 psi to 63 psi) to maintain output. A better choice to reduce smaller droplets and minimize drift would be to increase nozzle size.


Harvest 2013: Another Set Of Extremes, Charles R. Hurburgh Jr. Sep 2013

Harvest 2013: Another Set Of Extremes, Charles R. Hurburgh Jr.

Integrated Crop Management News

This sounds like a broken record, but we are looking at yet another harvest driven by weather extremes and combinations that are hard to predict. The major events were the extremely late planting in very wet soils, followed by an almost complete turnaround in many places to a steadily growing drought condition. In July, the market believed that our major harvest risk would be very wet and late crops vulnerable to even an average frost. By Sept. 1, protracted heat changed the picture completely to the point where corn harvesting has begun in several markets. The quality and management forecast ...


Manure Management Concerns Caused By Recent Wet Weather, Angela M. Rieck-Hinz, Daniel S. Andersen May 2013

Manure Management Concerns Caused By Recent Wet Weather, Angela M. Rieck-Hinz, Daniel S. Andersen

Integrated Crop Management News

The wet spring has raised many concerns about manure management for Iowa crop and livestock farmers. The following is a quick list of issues and possible responses to the issues. Farmers are encouraged to contact their local ISU Extension and Outreach ag engineer, field agronomist or livestock specialist, or the local DNR field office for additional information and assistance.


Planter Adjustments For Dry Soil, H. Mark Hanna Mar 2013

Planter Adjustments For Dry Soil, H. Mark Hanna

Integrated Crop Management News

Several factors affect the choice of corn seeding depth. Although many areas have received late winter precipitation, dry soil is still a concern in areas where tillage allows significant surface drying or precipitation has not occurred. Corn Seeding Depth: Back to the Basics, a recent ICM News article, discusses how to select appropriate seed depth. This article focuses on planter adjustment settings and considerations if seed is planted deeper than normal due to dry conditions in the upper two inches at the surface.


Aflatoxin And Grain Storage, Charles R. Hurburgh Jr. Sep 2012

Aflatoxin And Grain Storage, Charles R. Hurburgh Jr.

Integrated Crop Management News

In previous articles, we have discussed the aflatoxin issue from several angles – scouting, testing, use and handling. One key point is that once grain is dry and cold, or even just cold, the Aspergillus flavus fungus is rarely able to grow and produce more toxin. However, at least two problematic situations are arising –bin dryers operated at medium temperatures (below 120F) and high variability of moisture within fields.


2012 Iowa Harvest Exposure To Mold And Dust In Grain, Charles V. Schwab Sep 2012

2012 Iowa Harvest Exposure To Mold And Dust In Grain, Charles V. Schwab

Integrated Crop Management News

Grain dust is always a health concern for Iowa farmers and those working in the grain industry. Drought conditions this year may elevate human and animal health concerns because of increased dust and mold exposure. The Iowa Department of Public Health has issued 2012 Iowa Harvest Exposure to Mold and Dust in Grain, a fact sheet covering the following information.


Grain Management Issues Update, Charles R. Hurburgh Jr. Sep 2012

Grain Management Issues Update, Charles R. Hurburgh Jr.

Integrated Crop Management News

We are now well into harvest, corn before beans in many cases. This is yet another unusual situation. A lot of corn has been harvested with high outside temperatures, in the 80s and 90s, and was dried in the same conditions. This means corn in bins at much higher temperatures than normal. Early harvest corn will require at least two additional cooling cycles to reach the desired eventual temperature of 40F or below. The weather forecasts indicate that we will have chances to cool corn in the next week.


Aflatoxin: Handling Corn, Charles R. Hurburgh Jr. Sep 2012

Aflatoxin: Handling Corn, Charles R. Hurburgh Jr.

Integrated Crop Management News

Corn with known levels of aflatoxin must be directed toward the appropriate feed use, with documentation to the seller of its condition. Normally, aflatoxin corn cannot be blended for the purpose of diluting the aflatoxin concentration. However, in high incidence years, FDA has generally granted a waiver to allow blending for use in livestock feed, using prescribed blending and testing procedures, and with documentation to accompany the blended grain. Iowa has asked for this waiver in 2012; FDA response is forthcoming. Under no circumstances should corn known to contain more than 20 ppb aflatoxin be offered for sale to the ...


Aflatoxin: Testing Corn, Charles R. Hurburgh Jr. Sep 2012

Aflatoxin: Testing Corn, Charles R. Hurburgh Jr.

Integrated Crop Management News

Early harvest reports are confirming that there is some incidence of aflatoxin in 2012 corn. The highest potential is in the areas of extreme drought and in cases where August storms put corn on the ground.


Aflatoxin: Crop Insurance, Charles R. Hurburgh Jr., Chad E. Hart Sep 2012

Aflatoxin: Crop Insurance, Charles R. Hurburgh Jr., Chad E. Hart

Integrated Crop Management News

Aflatoxin is covered under multi-peril crop insurance. The settlement is done as a deducted percentage of actual yield depending on the aflatoxin level. Producers will receive the grain after settlement.


Aflatoxin Detected In Fields In Central And Southern Iowa, Alison E. Robertson, Charles R. Hurburgh Jr. Aug 2012

Aflatoxin Detected In Fields In Central And Southern Iowa, Alison E. Robertson, Charles R. Hurburgh Jr.

Integrated Crop Management News

Within the past two weeks, there have been several reports of aflatoxin detected in southern Iowa and also a few reports from central Iowa. Levels of aflatoxin have ranged from 8 ppb to almost 200 ppb. The FDA action level for aflatoxin in grain is 20 ppb.


Crop Quality Issues From The Drought Of 2012, Charles R. Hurburgh Jr., Alison E. Robertson, Connie L. Hardy Aug 2012

Crop Quality Issues From The Drought Of 2012, Charles R. Hurburgh Jr., Alison E. Robertson, Connie L. Hardy

Integrated Crop Management News

As we approach harvest, the impact of the drought on grain quality is becoming clearer. Corn in many areas to the west and east of Iowa reached maturity earlier. Most of Iowa's corn will be past black layer by Labor Day weekend. Soybeans have stopped and started with late rains, but expect pod count and seed size to be pretty well set by Labor Day as well. Regardless of crop and quality issue, please talk to your crop insurance company before harvest. Some quality issues are covered; others are not. Quality issues are resolved in crop insurance by deducting ...


Combine Settings For Drought, H. Mark Hanna Aug 2012

Combine Settings For Drought, H. Mark Hanna

Integrated Crop Management News

Hot mid-summer field conditions are affecting upcoming harvest. Although soybeans are still developing, corn ear diameter has been established in most fields. Smaller ear diameter and, in some fields, weaker stalks at the base of the corn plant and at the ear shank will affect harvest operations.


Dry Field Conditions Increase Harvest Fire Risks, H. Mark Hanna Aug 2012

Dry Field Conditions Increase Harvest Fire Risks, H. Mark Hanna

Integrated Crop Management News

Silage harvest is beginning in some areas. It’s always difficult to forecast weather, but if dry field conditions persist, potential for combine and field fires will increase. A high-temperature source in the engine area or an overheated bearing can ignite dry plant material.


Isu Extension And Outreach Offers Iowa Drainage School, Kapil Arora, Brent A. Pringnitz Jul 2012

Isu Extension And Outreach Offers Iowa Drainage School, Kapil Arora, Brent A. Pringnitz

Integrated Crop Management News

Agricultural drainage is becoming increasingly important due to the critical role it plays for Iowa's emerging bio-economy. Drainage systems that are properly designed and operating are essential to achieving excellent agricultural production capability.


New Safety Guidelines Developed For Two-Tank Anhydrous Ammonia Wagons, H. Mark Hanna Jul 2012

New Safety Guidelines Developed For Two-Tank Anhydrous Ammonia Wagons, H. Mark Hanna

Integrated Crop Management News

Size and capacity of farm equipment keeps getting larger and fertilizer equipment is no exception. Each year in Iowa approximately a billion pounds of nitrogen is applied as anhydrous ammonia. As equipment has gotten larger, many dealers are now using multi-tank systems with two anhydrous ammonia tanks mounted on to a single wagon running gear.


Pay Attention To Soil Crusting After Heavy Rain Events, Mahdi Al-Kaisi, H. Mark Hanna Apr 2012

Pay Attention To Soil Crusting After Heavy Rain Events, Mahdi Al-Kaisi, H. Mark Hanna

Integrated Crop Management News

Recent rain brings another challenge for farmers, especially in fields conventionally tilled last fall or early this spring. In addition to potential soil erosion and damages to soil structure rainfall can cause, there are after effects of the rain when the soil surface starts to dry. The potential problem is soil crust. Soil crust is a product of a weak soil structure and the absence of residue or cover crop to protect soil surface from the intensity of rainfall.


Improving Diesel Fuel Efficiency For Spring Field Operations, H. Mark Hanna, Dana Petersen Mar 2012

Improving Diesel Fuel Efficiency For Spring Field Operations, H. Mark Hanna, Dana Petersen

Integrated Crop Management News

Spring is here and, not surprisingly, diesel prices are trending upward. Taking time to implement a few simple management techniques can reduce farm fuel consumption and keep machinery running smoothly.


Precision Ag Technology Savings, Matthew J. Darr Feb 2012

Precision Ag Technology Savings, Matthew J. Darr

Integrated Crop Management News

The use of precision farming products continues to increase. With increasing input costs, producers are often looking for ways to adopt technology to make farming operations more efficient and productive. Two precision ag products, auto guidance and automatic section control, lead the way in cost savings while also enhancing the productivity of machinery operations.

Guidance systems reduce overlap in fields which leads to less passes across the field, less fuel and product use (i.e. seed, fertilizer, and herbicide), and fewer operator hours. These savings can be directly calculated if the amount of overlap is known. Additionally, swath control products ...


New Publication Helps Farmers Manage Energy Used For Corn Drying, H. Mark Hanna Sep 2011

New Publication Helps Farmers Manage Energy Used For Corn Drying, H. Mark Hanna

Integrated Crop Management News

When corn harvesting conditions allow optimal time for in-field drying, taking full advantage can reduce on-farm energy consumption. A new publication from Iowa State University Extension and Outreach explains the basic principles of energy management for grain drying.