nitrogen

Several field days are happening across the state throughout the month of June. Hear from our faculty experts along with other faculty and Extension and Outreach specialists about a variety of crop and pest related topics.

June 20 at 9:00 am: Northern Research Farm Summer Field Day - Kanawha, Iowa

A season review from ag specialists Matt Schnabel and Brandon Zwiefel
Sulfur use - Dr. John Sawyer
Weed control - Dr. Bob Hartzler
Cereal rye for seed - Dean Sponheim & Jamie Benning
Crop production issues - Paul Kassel & Angie Rieck-Hinz

June 27 at 1:00 pm: Northeast Iowa Agricultural Experimental Association Annual Spring Field Day - Nashua, Iowa

Crop weather outlook - Dr. Elwynn Taylor
Strip till and no till research - Dr. Mahdi Al-Kaisi
Nitrogen fertility - Dr. John Sawyer
Insect scouting and tips - Brian Lang

Honors students pursue individualized programs designed to enrich their educational experiences. As a part of their program, each Honors student plans, develops and completes an individual project. The results of those efforts were put on display at the Spring 2018 poster presentation of Honors projects held April 25. Participating students from Agronomy included:

Savanah Jones: Stress tolerance gene identification in Arabidopsis

Brittany Kirsch: Performance of a small, field-scale wetland

Samantha Reicks: Sulfur fertility in soybeans

Aimee Schulz: Inbreeding depression in wild maize populations subject to habitat degradation in southwest Mexico

Forecast and Assessment of Cropping sysTemS (FACTS; 2015-present)

FACTS is an ongoing project developed to forecast and evaluate real-time soil-crop dynamics in specific ISU fields. Predictions and measurements will be frequently updated as new information becomes available during the growing season. 

What we do:

by Ellen Bombella, College of Agriculture and Life Sciences Communications Service

Sotirios Archontoulis' curiosity about crops, soil and weather started at a very young age when he was growing up in Greece. He remembers going to the fields with his father, who was a farmer, in the heat of the afternoon to see if the crops needed watered.

"I thought to myself, there has to be a better way than this," Archontoulis said. "I was motivated to pursue agronomy because the farmers had to make important decisions without help."

Cover Crops and Nitrogen Retention

Cover crops are an integral component of cropping systems because they grow in the fall and early spring - that is, times when the soil would not have a growing corn or soybean crop. At present, cover crops are grown to benefit soil quality and reduce nitrate loss. In the future, ongoing research at ISU promises to identify additional benefits such as weed suppression. Cover crop acres are growing exponentially.

Dr. John E Sawyer
Professor

Recent years of high rainfall and prolonged wet soil conditions in Iowa have renewed interest to protect losses of fertilizer nitrogen (N) in corn. This study evaluated effect of N additives and a slow-release urea product on the soil NO3–N fraction of total inorganic N, mid–vegetative growth N stress, grain yield, and corn nitrogen use efficiency. Earn 1 CEU in Nutrient Management by reading this article and taking the quiz at www.certifiedcropadviser.org/education/classroom/classes/516.

 

Crops and Soils Magazine - Digital Extra, October 5, 2017

Antonio Mallarino, Matthew Helmers, Richard Cruse, John Sawyer, Dan Jaynes 

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