C.O.R.N. Newsletter

  1. Author(s): Steve Culman , Author(s): Peter Thomison

    As prospects for a timely start to spring planting diminish, growers need to reassess their planting strategies and consider adjustments. Since delayed planting reduces the yield potential of corn, the foremost attention should be given to management practices that will expedite crop establishment. The following are some suggestions and guidelines to consider in dealing with a late planting season.

    Issue: 2018-10
  2. Corn Harvest
    Author(s): Peter Thomison

    Hybrid selection is one of the most important management decisions a corn grower makes each year. It’s a decision that warrants a careful comparison of performance data. It should not be made in haste or based on limited data. Planting a marginal hybrid, or one not suitable for a particular production environment, imposes a ceiling on the yield potential of a field before it has been planted.

    Issue: 2017-40
  3. Author(s): Peter Thomison

    During the past two weeks, corn has “exploded” in growth in many Ohio fields. Under favorable growing conditions corn plants can grow nearly three inches per day between V8 (i.e., the eight leaf collar stage) and V15. However, there is considerable variability in corn development across the state, between neighboring fields, and within fields. Most of this variation can be attributed to planting date differences. Corn planted in mid to late April is at or beyond V13 whereas corn planted in early to mid-June is usually at stages no later than V3-4.

    Issue: 2017-19
  4. Author(s): John Fulton

    2017 has been a “wet” spring for planting which also can cause compaction issues; side-wall and pinch-row compaction. Compaction of any kind can lead to emergence issues and possible yield loss. Identifying compaction is the first step in understanding the consequences during the growing season and at harvest while also beginning to consider options for mitigating if long-term consequences appear to be in place.

    Issue: 2017-16
  5. Author(s): Peter Thomison

    According to the USDA/NASS (https://www.nass.usda.gov/Statistics_by_State/Ohio/Publications/Crop_Progress_&_Condition/2017/cw2117oh.pdf), for the week ending May 21, corn was 73 percent planted, which was 24 percent ahead of last year and the same as the five-year average. 

    Issue: 2017-14
  6. Author(s): Peter Thomison , Author(s): Allen Geyer

    According to the USDA/NASS (https://www.nass.usda.gov/Statistics_by_State/Ohio/Publications/Crop_Progress_&_Condition/2017/cw2117oh.pdf), for the week ending May 21, corn was 73 percent planted, which was 24 percent ahead of last year and the same as the five-year average.  However, at this time, it is unknown what percent of the earlier planted corn has been or will be replanted due to excessive soil moisture, freezing temperatures and frosts, fu

    Issue: 2017-14
  7. Corkscrewed mesocotyls in corn
    Author(s): Peter Thomison

    Last week I received several reports of abnormal corn emergence. Often the problems were associated with corn seedlings leafing out underground and it’s likely weather and seedbed conditions were responsible for the occurrence of the abnormal growth. Seedlings exhibiting abnormal emergence may have a twisted appearance because internal leaves start expanding before the seeding has elongated. “Corkscrewed” mesocotyl/coleoptile development may occur when the coleoptile encounters resistance (like soil crusting or a dense soil surface) as the mesocotyl elongates.

    Issue: 2017-13
  8. Author(s): Peter Thomison
    Issue: 2017-13
  9. Author(s): Peter Thomison

    Heavy rains over the weekend resulted in saturated soil conditions across much of the state. Excessive rainfall in some areas resulted in localized ponding and flooding of corn.

    Issue: 2017-11
  10. Author(s): Peter Thomison

    Planting depth recommendations for Ohio are 1.5 to 2 inches deep to ensure adequate moisture uptake and seed-soil contact. Deeper planting may be recommended as the season progresses and soils become warmer and drier, however planting shallower than 1.5 inches is generally not recommended at any planting date or in any soil type. When corn is planted 1.5 to 2 inches deep, the nodal roots will develop about 0.75 inches below the soil surface. However, at planting depths less than 1 inch, the nodal roots develop at or just below the soil surface.

    Issue: 2017-10