Here are several topics and crop management news items of interest to Iowa farmers. These news items are hand-picked from Mark Johnson's latest crop management newsletter. Based at Ankeny, he's the ISU Extension field agronomist covering central Iowa.
Ag Chem Dealer meetings to help prepare for 2016: These meetings will provide attendees with timely crop, pest and nutrient management information. Updates on the latest crop production products and recommendations are the main topics that will be discussed. ISU Extension and Outreach is holding these meetings in Iowa City, November 24 and Ames, December 16. Other ISU Extension field agronomists will be holding similar meetings in other areas of the state this winter.
Ag input providers and farmers attending these meetings can meet with ISU Extension specialists to review current research, discuss new products and learn new recommendations to prepare for next year's crop production challenges.
Each location on November 24 and December 16 will feature presentations on weed, insect and crop disease management, and an update on the past growing season. These meetings are approved for Certified Crop Adviser (CCA) credits. The meetings also offer Iowa Commercial Pesticide Applicator recertification in categories 1A, 1B, 1C and 10 for calendar year 2015. Recertification is included in meeting registration. Attendance at entire meeting is required for recertification.
Early registration is $70 if received by midnight, Nov. 17 (Iowa City) or Dec. 9 (Ames). Late or on-site registration is $85. Visit aep.iastate.edu/acu for program details or to register online. For additional information on these meetings or meetings in other areas of the state, contact an ISU Extension field agronomist hosting the meeting.
* Iowa City – Nov. 24: Virgil Schmitt, [email protected], 563-263-5701
Meaghan Anderson, [email protected], 319-337-2145
* Ames – Dec. 16: Mark Johnson, [email protected], 515-382-6551
Angie Rieck-Hinz, [email protected], 515-532-3453
Tips for fall fertilization and anhydrous ammonia application
Fall application of anhydrous ammonia needs to wait until the 4-inch soil temperature is down to 50 degrees F and a forecast is cooling off so that will keep the temperatures down there. "The same is true with manure," says Johnson. "If you need to apply some because you are running out of storage, do so, but only enough to get you by. Then restart once the soil is cool enough. Remember that manure contains nitrogen and with today's crop prices, you don't want to lose that nutrient."
Apply livestock manure, cut your fertilizer bill. Here are some values for manure that you can use to cut back on your commercial fertilizer, says Johnson. Pencil these credits into your fertility program.
Nutrient Availability in Manure
First Year Nutrient availability
Animal N P K
% Total Nutrient Applied
Beef & Dairy 30-40 60-100 90-100
Poultry 56-60 90-100 90-100
Swine liquid 90-100 90-100 90-100
Source: ISU Extension publication PMR 1003
If you have questions, contact Mark Johnson at [email protected].
Stover harvest: It appears that some of the fields in central Iowa have had more than half the stover removed this fall: the amount that is sustainable. So it is in your best interest to do as little tillage as possible, says Johnson. Preferably, don't do any tillage at all this fall. Check out ISU Extension publication PM 3052D available from the ISU Extension Online Store.
Fall tillage of stover fields: Visit this site at bit.ly/1LOeYkn for good information concerning tillage after partial stover removal. Also, be sure to consider nutrients that were baled and removed from the field. Baled stover/crop residue can remove the following amounts of phosphorus and potassium:
* P205: You'll remove 5 pounds of P per acre for every ton of corn stover harvested at 15% moisture content.
* K20: You'll remove 18 pounds of K per acre for every ton of corn stover harvested at 15% moisture content.
These figures represent nutrient removal that is harvested immediately after grain harvest. See page 4 and table 2 in ISU Extension publication PM 1688. Read ISU publication PM 3052C at bit.ly/1PjyPKx for more information on nutrient removal.
Fall tillage in general: The forecast is for a winter with less-than-normal snowfall. "Without snow cover, wind erosion will be high this winter; so do as little fall tillage as you can get by with," advises Johnson.
Stored grain management: Here are grain moistures for safe storage. If corn is to be sold by spring, it will keep at 15.5% moisture content. If you plan to store corn for six to 12 months, it should be no higher than 14.0% moisture content. For corn to be safely stored more than 12 months, you want it to be no higher than 13.0% moisture content.
Grain that is stored at low moisture content this fall still needs aeration, notes Johnson. Cool the grain down to 30 to 40 degrees with aeration this fall when the weather cools to allow you to do this. Aeration fans that are sized at 0.1 CFM per bushel will take about 150 hours or six to seven days to cool a bin of grain.
Integrated Crop Management Conference: The annual ICM conference will be held December 2-3, 2015 in Ames. Registration and conference details are on the ISU ICM website.
Soil Health Conference: It's February 2-3, 2016. See the "save the date" flyer on the ISU Integrated Agronomics Newsletter website.
Register for CCA Exams: Register with ISU Extension by Dec 11 for Feb 5, 2016 Certified Crop Adviser Exams, which also includes 4R, Sustainability and Manure Management exams.