2015-2016 2 Year Corn Emergence Trial

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In 2015-16 I ran a corn plant emergence study. In this study I measured off 40ft with 4 replications. I chose to flag the day 1 emerged plants to day 4 emergence using only 12 flags in each replication. So I flag on the first one coming out of the ground day 1 the second day two the third day 3 . I went in at harvest and counted the ears in the 40ft row and then counted on the 12 flagged plants the number of kernels per row and number of rows on the ear. I used a estimated corn weight for dry conditions since most of this year was dry as a figure. The results are interesting:

Day 1 was an estimated yield of 163.36 bu per acre x 3.75 corn price =$ 612.60

Day 2 was an estimated yield of 97.35   bu per acre x 3.75 corn price =$ 365.06

Day 3 was an estimated yield of 82.73   bu per acre x 3.75 corn price =$ 310.23

What I discovered in this observation was day 3 plants had no ears at all for the most part and a thin week stalk.

Now the question is how do I get more uniformity in my emergence to where most of the plants come up the first day and not past the second day?

Issues a producer may want to look at is high quality seed with an excellent emergence score. Most companies score for emergence and can tell you that.

The second in setting your planter and make sure you get the right depth and seed placement from field to field. The third is looking at a starter fertilizer program that can put fertilizer right near the seed for quick root access. The fourth is planting date. In the study I did in Granville and Person Counties the Person County one was planted in late April and the Granville in early May no doubt I had more Day 1 plants on the warmer soil temps in the May planting. You as a producer know your fields and know what can be planted early and have a good yield.

Next to weather emergence and plant stand and uniformity are one of the most critical elements. I heard a specialist tell me many years ago that yield is determine at planting.

Written By

Photo of Gary Cross, N.C. Cooperative ExtensionGary CrossArea Agent, Agriculture - Field Crops (919) 603-1350 (Office) gary_cross@ncsu.eduGranville County, North Carolina
Posted on Sep 19, 2016
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