Antonio Mallarino

Dr. Antonio Mallarino is a professor of agronomy and nutrient management research and an extension specialist at Iowa State University. His programs focus on agronomic and environmental issues of nutrient management with emphasis on phosphorus, potassium, lime, and micronutrients. Issues addressed include soil and plant-tissue sampling and testing, fertilizer and manure placement methods to increase nutrient use efficiency and crop yield, use of variable-rate technology, and phosphorous management impacts on water quality. Dr. Mallarino was a prominent member of the team that developed the Iowa Phosphorus Index and is a member of the science team of the Iowa Nutrient Export Reduction Strategy contributing about phosphorus management and water quality. He has calibrated several soil and plant tissue test methods and developed interpretations for Iowa soils.

Dr. Mallarino has been faculty in charge of the Iowa State University Soil and Plant Analysis Laboratory, represents the Iowa Experiment Station at the regional or national committee's Soil Testing and Plant Analysis for the North Central Region (NCERA-13) and Minimizing P Losses From Agriculture (SERA-17/IEG), has served in the oversight committee for the North American Proficiency Testing Program, and has served as Associate Editor of Agronomy Journal and Soil Science Society of America Journal. He is Fellow of the American Society of Agronomy (ASA) and the Soil Science Society of America (SSSA), and, among other awards, received the W.L. Nelson Award for Diagnosis of Yield-Limiting Factors (ASA) and the SSSA Applied Research Award. He has published numerous peer-reviewed scientific articles and technical or extension articles, and has mentored 40 graduate students.

Antonio Mallarino
December 13, 2021 11:45 AM

Planting soybean in the same field that just grew soybean is not recommended. Soybean yield will suffer even before factoring in environmental conditions, weather, and pest/disease pressures. 

Four different studies in Minnesota and Wisconsin have shown a yield decline of at least 5% and...

Crop Production
August 23, 2021 2:45 PM

As we enter the harvest season, we know we need to be looking forward to the next growing season at the same time. Having plans in place for your 2022 fertilization program before harvest starts is a good idea. Making these plans is tougher this year due to variable yields across the state due...

Soil Fertility
July 11, 2021 10:33 AM

A common sight across the state this summer has been yellow or white patches of soybean in otherwise green fields. This ICM Blog will review several possible causes of yellow soybean and provide resources regarding each phenomenon.


Iron Deficiency Chlorosis (IDC)...

Crop Production, Soils, Soil Fertility
March 19, 2021 9:55 AM

Prices for soil fertility inputs have increased greatly in recent months. The bi-weekly “Iowa Production Cost Report” showed a 51% cost increase in anhydrous, a 31% increase for urea, 56% higher...

Soil Fertility
September 4, 2019 8:35 AM

Sampling corn stalks this fall will likely be later than normal due to the delayed planting in many Iowa cornfields. The overall suggestion is to wait until crop maturity, and sample within 1-3 weeks after kernel black layer. This does not work well for silage corn, so the suggestion is to...

Soil Fertility
January 26, 2018 11:46 AM

If you are interested in an in-depth course covering soil fertility and nutrient management, then consider attending the Iowa State University Extension and Outreach 2018 Soil Fertility and Nutrient Management Short Course. This is a two-day event that provides an opportunity to dig deeper into...

Soil Fertility
December 18, 2017 8:06 AM

The Iowa State University Extension and Outreach Soil Fertility web site has undergone a recent redesign and update. The site was updated, but the URL has remained the same (http...

Soil Fertility
June 15, 2016 1:05 PM

The Using Manure Nutrients for Crop Production publication (PMR 1003) has recently been updated with revised beef cattle and dairy manure nitrogen (N) and phosphorus (P) crop...

Crop Production, Soil Fertility