Corn

IPM scouting tips that appear in the Agronomy Newsletter.

Agronomy News-June 2022, Volume 13, Issue 3. Topics in this issue are: Increased Cost-Share for Select BMPS, Agriculture Reducing Greenhouse Gas Emissions, June Insect Scouting Tips, Maryland Dairy Day, Troubleshooting Wheat Disease Symptoms, Grain Market Report, Weather Outlook, and Regional Crop Reports.

Resources on growing organic grain

The University of Maryland offers a fee-based, corn hybrid performance testing program to local and national seed companies. The results from these replicated trials provide agronomic performance information about corn hybrids tested at five locations in Maryland considered representative of the state’s geography and weather conditions.

For a project sponsored by the Maryland Grain Producers, we looked at increasing applications of sulfur (S) and boron (B) on corn yields and nutrient uptake. As anions, S and B leach easily from the soil surface (particularly sandy loams), potentially leading to crop deficiencies. In the soil N is also commonly in an anion form (NO3), which may also leach easily, or compete for uptake with the anions S and B. Therefore, our question was whether the addition of S and/or B would also affect the uptake of N into corn.

Organic grain production is promoted for greater potential profits with premium grain prices, improved soil health with organic inputs and fewer environmental hazards in the absence of synthetic chemical use. However, the three-year period required for organic certification is a challenging phase when transitioning farmers are learning to do without synthetic chemical manage soil fertility, weeds, diseases and pests, while not yet receiving those attractive premium prices (Delate and Cambardella, 2004). Organic grain production, if done regeneratively, may reduce environmental impacts and increase ecosystem services from agriculture. Among the latter, minimization of nutrient loss to water is especially important in Maryland, since a good deal of the nitrogen and phosphorus pollution to the Chesapeake Bay comes from agriculture (2025 Watershed Implementation Plans (WIPs)). However, the change in environmental impacts due to the transition from “conventional” to organic farming could be either positive or negative (Bavec and Bavec, 2015), depending on the system of practices (inputs, soil disturbance, soil cover, etc.) utilized in the conventional and organic systems (Röös et al., 2018).

September Grain Market Summary

Dairy farmers are constantly looking for sources of forage to meet their feed needs. One source that many of our region’s dairy farmers utilize is the fall planting of cereal grains that are green-chop harvested the following spring. Among the cereal species used for this purpose are rye, triticale, barley, and wheat. Per the Maryland Cover Crop Program guidelines, cereal grains planted as a cover crop prior to November 5 and suppressed via green-chop in the spring are eligible for the grant payment for participation in the Cover Crop Program. In addition, per the Nutrient Management Regulations, a fall application of dairy manure is allowed to a field planted to a cereal cover crop.