Mark Licht
Dr. Mark Licht is an associate professor and extension cropping systems specialist with Iowa State University Extension and Outreach. His extension, research and teaching program is focused on how to holistically manage Iowa cropping systems to achieve productivity, profitability and environmental goals. Research is centered around varied aspects of soybean, corn and cover crop management as well as agronomic implications of precision technologies.
Subscribe to RSS FeedFollowing the derecho event on August 10, millions of acres in Iowa face challenging conditions. In many cases the corn may be unharvestable. These unharvestable fields require some level of fall management to ensure the future crop can achieve even emergence and normal early plant growth.
...Fall Management Options for Corn Fields That Are Unharvestable
Millions of corn acres have been damaged by the derecho on August 10. Unfortunately for some of these acres, harvest will not take place. Decisions regarding fall management options will need to be made in the...
Low rainfall and high temperatures recently have caused some drought stress on local crops this summer. This is not wholly unexpected and there are some strategies crop producers can do to minimize the damage.
Higher nighttime temperatures cause plants to have higher nighttime respiration...
In 2018 and 2019, research was conducted on a relay intercropping and double cropping systems to evaluate as a possible alternative to Iowa’s traditional corn-soybean or continuous corn cropping system.
There were 2 sites; one near Kalona and another near Ames, Iowa, to study these...
Each year, decisions on planting date and cultivar selection are the major deciding factors on yield potential. Under current, year-to-year variable weather patterns and future climate change these decisions have become much more important. And there is a known knowledge gap on how future...
For a couple of years, some Iowa farmers have noticed lower yields along the southern and/or western edges of their fields. The low yields along the border tend to be prevalent when soybean, hay, or pasture are growing adjacently to the field on the southern or western edge. This phenomenon...
Since July 1 high humidity and temperatures have been scorching Iowa. Okay, maybe that is a little extreme. June has led to dry conditions across much of central and southwest Iowa. Heat and dry weather are not desired weather conditions in the 2 weeks before or after pollination. This four-week...
Many farmers and agronomists are noticing short soybean this spring. Some are pondering if there is something that can be done to spur some additional growth as flowering is fast approaching, if not already begun. The surprise with short soybean is that planting was timely. The unfortunate...
Radiation is down up to June 1 according the latest FACTS extrapolations.
The springtime decreases in radiation—especially in May—could have caused yellowing corn leaves and slowed down leaf appearance rates (radiation and moisture play a role in phenology, even though temperature is the...
With the weather Iowa has recently experienced and the time of year it is, we all can expect to see purple and yellow corn and even some tattered leaves: the ugly ducklings of your field. Don’t fret just yet, cooler temperatures and wet conditions are all contributing factors to the mosaic...
Planting is nearly wrapped up for corn, with soybean soon to follow. What a difference a year makes considering the last two years have seen planting delayed. That means corn and soybean emergence should be good, right? Wrong! The cost of seed makes it essential to get the highest, most uniform...
The Forecasting and Assessment of Cropping Systems (FACTS) from Iowa State Extension and Outreach results as of May 5 extrapolate that Iowa soils a bit drier than neighboring Illinois or Indiana, but shouldn’t be an issue moving forward:
...Friday and Saturday night will have cold temperatures reach into northern Iowa and maybe even southern Iowa. Below is a National Weather Service low temperature prediction (https://digital.weather.gov) for Saturday, May 9. Notice that north of Interstate...
The Forecasting and Assessment of Cropping Systems (FACTS) project is up and running with accurate, recent data to inform decision making for a variety of industry professionals. FACTS is an ongoing project developed to forecast and evaluate in...
Farmers in Iowa have been experimenting with very early soybean planting dates, from late March to mid-April. Based on reviews of the yield data, there is not a consistent yield benefit to planting early as opposed to planting the first week of May. But one benefit of very early planting is that...
March into early April has been warm enough and dry enough to the point that soil conditions are good for planting. The calendar date is a bit early; after all the crop insurance, replanting is April 11. Regardless, many are pondering if they should be planting corn already, and some maybe...
This year let’s all toss out planting windows for corn. Farmers should be focused on when soil conditions are prime to plant. Soil temperatures need to be on the rise; 50oF and rising. Planting 24-36 hours before a cold spell—regardless of how long—is putting your seed at risk of cold...
The USDA Sustainable Agriculture Research and Education (SARE) program, along with the...
It doesn’t happen every year, but it does occur – snow accumulation before harvest is complete. Here are some considerations and tips for dealing with this unique situation:
A portion of Iowa’s corn crop is likely to experience a frost before naturally reaching maturity as a result of cool temperatures later this week. Natural maturity is often determined when a black layer is formed at the kernel tip. At this timeframe grain moisture is typically 28–35% moisture....
One of the pressing questions this fall is when corn will reach maturity and if there is going to be enough time to dry down in the field. We have developed and released a corn grain dry down calculator that can help...
Update on crop and soil status across the I-states – August 21, 2019
This year the FACTS project is providing a suite of regional scale maps to assist decision making. The data provided is based on APSIM model simulations which are driven...
According to the latest NASS report, the 2019 corn crop is about 2-weeks behind normal in terms of reaching dent stage. What are the implications of this delay in grain filling period and end of season yield? We address this question by examining two key weather variables; solar radiation and...
As July comes to a close, it is time to make plans to seed fall cover crops. Cover crop species, seeding method, seeding rate, and timing will all depend on the goals for that cover crop. In broad terms there are three methods: 1) overseeding, 2) drill seeding, and 3) broadcast seeding with...