Current Topics
- Fall Phosphorus and Potassium Fertilization Decisions with Variable Prices and Updated Soil-Test Interpretations -- September 21, 2023
- Iowa State University Extension Phosphorus and Potassium Soil-Test Interpretation Guidelines Have Changed -- March 1, 2023
- Beware of Dry Conditions When Soil Sampling and Interpreting Test Results This Fall -- October 10, 2022
- Using the Late Spring Soil Nitrate Test In 2022 -- June 7, 2022
- Starter Fertilizer for Corn: A Potentially Useful Practice with a Cold Spring and High Fertilizer Prices -- April 18, 2022
- Considerations for Spring Preplant Nitrogen Application for Corn with High Fertilizer Prices -- April 12, 2022
- Soil-test interpretations for fall fertilization and liming decisions with high fertilizer prices and after highly variable rainfall and crop yields -- October 13, 2021
- Thinking of plant tissue testing this season? Beware of drought or excess moisture effects -- July 11, 2021
- What causes striped corn leaves? -- June 21, 2021
- Be cautious when interpreting fall soil-test results following drought -- October 16, 2020
- Anhydrous ammonia application in dry soil -- October 1, 2020
- Fall Nitrogen Considerations -- 2020 -- September 11, 2020
- Breakdown of Wind Destroyed Corn -- August 28, 2020
- Wind Damaged Corn - Nutrient Content? -- August 17, 2020
- Responding to increasing drought conditions in Iowa - A webinar series -- July 27, 2020
- Spring Nitrogen Fertilizer Applications -- March 19, 2020
- Corn Nitrogen Rate Calculator Website -- February 21, 2020
- Crop Advantage Series 2020 -- December 2, 2019
- Phosphorus and potassium managment for 2020 after a year with highly variable yields -- October 22, 2019
- 49th Annual North Central Extension - Industry Soil Fertility Conference -- September 25, 2019
- Nutrient removal when harvesting corn stover -- September 18, 2019
- Upper soybean leaves begin showing potassium deficiency symptoms since early August -- August 23, 2019
- Tissue testing for field crops requires cautios use and interpretation -- July 1, 2019
- Nitrogen fertilization options with delayed or rescue applications -- June 7, 2019
- Springtime precipitation tool - corn nitrogen application needed -- June 4, 2019
- Late-spring soil nitrate test (LSNT) use in 2019 -- May 22, 2019
- Unharvested or Hailed-Out Soybean Fields - Nutrient Supply to Corn? -- March 18, 2019
- Anhydrous Ammonia Application -- Spring 2019 -- February 26, 2019
- Announcement: NCERA-13 Soil and Plant Analyst's Workshop -- February 26-27, 2019 -- February 4, 2019
- Soil Fertility and Nutrient Management Short Course February 19-20, 2019 -- January 15, 2019
- 2019 Crop Advantage Series -- November 19, 2018
- Thirtieth Integrated Crop Management Conference -- November 7, 2018
- 48th Annual North Central Extension-Industry Soil Fertility Conference -- September 10, 2018
- End-of-Season Corn Stalk Nitrate Test Publication Updated -- August 30, 2018
- Soybean Potassium Deficiency Symptoms During Early and Late Growing States -- August 20, 2018
- Phosphorus and Potassium Tissue Testing Recommendations Available in New Publication -- June 28, 2018
- Potential Nitrogen Loss - 2018 -- June 22, 2018
- Starter Fertilization Can Help with Cool Soil and Late Planting Dates -- April 26, 2018
- A Late Spring - Nitrogen Considerations -- April 18, 2018
- Corn Nitrogen Rate Calculator Website - 2018 Update -- March 26, 2018
- Nitrogen Use: It's Not Your Grandfather's Corn -- February 8, 2018
- 2018 Soil Fertility and Nutrient Management Short Course -- January 22, 2018
- Welcome to the Revised Soil Fertility Web Site -- December 11, 2017
- 47th Annual North Central Extension - Industry Soil Fertility Conference -- October 4, 2017
- Nitrogen Considerations with Dry Conditions in 2017 -- August 29, 2017
- Phosphorus, Potassium, and pH Management Following Drought Affected Crops -- August 17, 2017
- Phosphorus and Potassium in Silage Harvest of Drought-damaged Corn -- July 21, 2017
- Estimating Losses When Cornstalk Fields Are Accidentally Burnt -- July 20, 2017
- Dry Fall Conditions Can Lead to Field Fires -- July 20, 2017
- Potential N Loss - Spring 2017 -- May 31, 2017
- New Late-Spring Soil Nitrate Test Publication -- May 25, 2017
- Corn Nitrogen Rate Calculator Website - 2017 Update -- March 27, 2017
- Proper Soil Sampling Can Lead to Better Yields and Profits -- February 3, 2017
- 2017 Soil Fertility and Nutrient Management Short Course -- January 11, 2017
- High Yields, Low Grain Prices: Manage Phosphorus and Potassium Wisely -- October 24, 2016
- 46th Anual North Central Extension-Industry Soil Fertility Conference -- September 14, 2016
- Late-Vegetative Corn Stage Soil Sampling for Nitrate-N -- June 28, 2016
- Value of Soybean Tissue Testing for Phosphorus and Potassium -- June 20, 2016
- Research Shows a Role for Phosphorus and Potassium Tissue Testing in Corn -- June 13, 2016
- Precipitation and Nitrogen this Spring -- June 9, 2016
- Corn Nitrogen Rate Calculator Website Update -- May 2, 2016
- Nitrogen Loss? -- December 18, 2015
- Fertilizer Nitrogen Application this Fall -- October 14, 2015
- Make Rational Decisions About Phosphorus and Potassium Management with Unfavorable Crop Prices -- September 16, 2015
- Nitrogen Issues So Far This Spring -- June 5, 2015
- Starter Fertilization Sometimes Boosts Corn Yield -- March 23, 2015
- Nitrogen Fertilization Rates for Corn Production -- October 14, 2014
- Fall Nitrogen Applications and 50°F Soil Temperature -- October 13, 2014
- Corn Nitrogen Rate Calculator Update -- July 21, 2014
- Estimating Nitrogen Losses -- June 16, 2014
- Compressed Spring Workload in 2014? What are Nitrogen Application Options? -- March 31, 2014
- Update to Iowa Phophorus, Potassium, and Lime Recommendations -- September 20, 2013
- Nitrogen Loss - Spring 2013 -- June 10, 2013
- New Nutrient Management Planning Education Materials -- June 7, 2013
- Corn Nitrate Rate Calculator Update -- May 31, 2013
- Soil Profile Nitrate - Spring 2013 Sampling Summary -- May 30, 2013
- Apply Nitrogen or Plant Corn -- May 7, 2013
- Wet Conditions and Change in Soil Profile Nitrate -- May 6, 2013
- Don't Underestimate the Value of Starter Fertilizer for Corn Planted Late -- May 3, 2013
- Soil Profile Nitrate in Corn Fields Following the 2012 Drought -- February 21, 2013
- The Moist Soil Test for Potassium and Other Nutrients - What's It All About? -- September 27, 2012
- Soil Fertility Management Issues Following Drought Damaged Crops -- Phosphorus, Potassium, and pH -- August 22, 2012
- Soil Fertility Management Issues Following Drought Damaged Crops -- Nitrogen -- August 13, 2012
- Phosphorus and Potassium in Silage Harvest of Drought Damaged Corn -- July 27, 2012
- Care with Plant Nutrient Analysis -- June 22, 2012
- Why Are Potassium Deficiency Symptoms Showing Now in Corn and Soybeans? -- June 8, 2012
- Corn Nitrogen Rate Calculator Update -- April 23, 2012
- Soil Fertility and Nutrient Management Short Course -- February 15-16, 2012 -- January 28, 2012
- Change in Phosophorus and Potassium Contents of Cornstalks Over Time -- December 14, 2011
- Anhydrous Ammonia Application and Dry Soils -- October 28, 2011
- Flood Recovery - Flooded Soil Syndrome -- September 12, 2011
- Is Foliar Fertilization Useful to Supplement Pre-plant Fertilization? -- July 21, 2011
- Spring 2011 - Nitrogen and Sulfur Issues -- June 13, 2011
- Corn Nitrogen Rate Calculator Update -- April 12, 2011
- Fact or fiction: Anydrous ammonia application should not exceed 10 lb N per unit soil CEC -- February 22, 2011
- North Central Soil-Plant Analyst's Workshop -- January 14, 2011
- Late Nitrogen Application Demonstration - Corn Yield Update -- October 26, 2010
- Corn Stalk Nitrate Interpretation -- September 14, 2010
- Corn Nitrogen Rate Calculator Update -- August 17, 2010
- Late Nitrogen Application Demonstration -- August 16, 2010
- Energy Efficiency in Corn Nitrogen Fertilization -- July 22, 2010
- Is In-Season Fertilization for Soybean Effective? -- June 19, 2010
- Estimating Nitrogen Loss and Applying Additional Nitrogen -- June 14, 2010
- Wet Soil Conditions and Nitrogen Loss -- May 17, 2010
- Corn Injury from Anhydrous Ammonia -- April 20, 2010
- Glyphosate-Manganese Interactions in Roundup Ready Soybean -- March 11, 2010
- Runoff Phosphorus Loss Shortly After Applying Fertilizer and Animal Manure without Incorporation Into the Soil -- November 25, 2009
- Getting Ready for Fall Fertilization -- August 23, 2009
- Foliar Fertilization of Corn and Soybean -- June 30, 2009
- Soil Nitrate Sampling - Banded Nitrogen -- June 15, 2009
- Corn Seedling Injury from Ammonia -- May 22, 2009
- Effects of Crop Rotation and Nitrogen Fertilization for Corn on Yields of Corn, Silage Corn, Soybean, and Oats -- April 20, 2009
- Corn Nitrogen Rate Calculator Update -- March 27, 2009
- Yellow Corn, Wet Soils, and N Loss - Part 4 -- February 6, 2009
- Liquid Swine Manure Nitrogen Availability -- February 1, 2009
- What Are Average Manure Nutrient Analysis Values? -- January 26, 2009
- Using Layer Manure for Crop Production -- November 5, 2008
- New Manure Crop Nutrient Use Publication -- October 13, 2008
- Escalating Fertilizer Prices and High Production Costs Make Tough Fertilization Decisions -- September 22, 2008
- Corn Nitrogen Rate Calculator Updated -- July 21, 2008
- Yellow Corn, Wet Soils, and N Loss - Part 3 -- July 8, 2008
- What About Foliar Fertilization for Soybean This Year?-- July 5, 2008
- Yellow Corn, Wet Soils, and N Loss - Part 2 -- June 27, 2008
- Yellow Corn, Wet Soils, and N Loss -- June 20, 2008
- Measuring the Nitrogen Status (Part 3) -- June 13, 2008
- Estimating Nitrogen Losses (Part 2) -- June 11, 2008
- Nitrogen Loss - How Does It Happen (Part 1) -- June 10, 2008
- Importance of Nitrogen in Soils -- May 27, 2008
- Surface Waters: Ammonium is Not Ammonia - Part Three -- May 21, 2008
- It's a Late Spring: Should You Apply Nitrogen or Plant Corn?-- May 5, 2008
- Surface Waters: Ammonium is Not Ammonia - Part Two -- April 29, 2008
- Surface Waters: Ammonium is Not Ammonia -- April 21, 2008
- You Couldn't Apply Phosphorus and Potassium Last Fall and Now It's Too Wet? -- April 14, 2008
- What is Meant by Crop Availability of Manure Nutrients? -- April 9, 2008
- Is Manure the Same as Fertilizer as a Crop Nutrient Resource? -- April 3, 2008
- Don't Double Dip Soybean -- March 25, 2008
- New Online Source in Iowa for Crop Production News -- March 20, 2008
- Nitrogen Fertilization for Corn Following Corn -- March 19, 2008
- Welcome -- March 10, 2008
ICM’s Blog Posts