Growers don’t have to look very far into the past for confirmation of this fact. According to data collected by the National Agricultural Statistics Service USDA/NASS, only 62% of the 2009 corn crop was planted by the week ending May 17th. Despite later planting dates, the national average yield for the 2009 crop was 164.4 bu/ac. In 2012, 96% of the corn crop was in the ground as of the week ending May 20th. The crop was off to a great start, but thanks to the drought, the national average yield was only 123.1 bu/ac in 2012. Although it is widely understood that planting date is an important management practice influencing corn yields, 2012 proved other factors (such as the drought) can diminish the yield potential of an early planted crop.
Several other factors must be considered at planting. What are the field conditions? If the soil is too wet, any field work can cause yield-robbing compaction. Planting into wet soil can cause smearing and sidewall compaction of the seed furrow. Pictured above is the root system of a corn plant affected by sidewall compaction due to wet planting conditions. What is the soil temperature? Soil temps should be 50 degrees F or above for corn to promote germination and early growth. What does the weather forecast look like? Will it promote germination and growth or will it be a pattern for cold and wet weather, which could delay emergence and cause damage to seedlings? Planting into less-than-ideal field conditions just to beat a date on the calendar usually results in problems that hurt yield potential more than a slight delay in planting would. As spring planting approaches, producers should take into consideration all important factors when making planting decisions and avoid focusing only on the calendar.
Matt Hutcheson, CCA
Seed Consultants, Inc.