It's not too late to plant Clearfield rice varieties
Wet fields and cool weather are affecting planting in much of the southern rice-growing areas and thus, the most common question we’ve been getting is, “Are we too late to plant varieties?”
The answer is “no” according to planting date data generated at Mississippi State University.
Current weather modeling indicates that we are on a pattern very similar to 2013, a season of delayed plantings, yet record rice yields in many areas. Clearfield varieties can perform well when planted into the month of May.
In 2013, the maximum relative grain yield potential (RGY) was achieved for CL111 planted on April 29, and for CL151 and CL152 planted on May 16.
It is also good to note the following:
- Data collected on CL111 since 2009 shows that average yield has been 93 percent of the relative grain yield when this variety is planted during the April 10 to May 20 window.
- Data collected on CL151 since 2008 shows that average yield has been 91 percent of the relative grain yield when this variety was planted during the same window.
- And data collected since 2011 on CL152 shows an average yield of 92 percent of the relative grain yield when planted during the same window.
Current soggy conditions and field inactivity have many recalling the late-planted rice of 2010 and 2011. Both of these years had excessively high daytime and nighttime temperatures, which resulted in yield and quality loss from panicle blight and pollen sterility issues.
The 2014 season, however, is shaping up to be similar to last year. As an example, from March 1 through April 7, 2013, approximately 153 DD50 heat units were accumulated in the Stoneville, MS area. This spring, from March 1 to April 7, we’ve accumulated about 173 DD50 units.
We also continue to receive calls about water-seeding. The recommended water-seeding rates on Horizon Ag Clearfield varieties are 65 to 75 lbs/seed per acre. Dermacor® seed treatment is recommended for water-seeded rice. Some fields have been worked for drill-planted rice, which is not ideal for water-seeding because of the smooth seedbed. In these instances, we recommend seed be soaked to promote germination before broadcasting.
Technical Services Manager
Horizon Ag Planting Report
Mississippi, Arkansas and Missouri
A substantial amount of field work has been done and several thousand acres of rice has been planted in Arkansas. There has been very little rice planted in Mississippi and Missouri. Even though we are in the second week of April, soil temperatures and growing conditions are more like the last two weeks of March. We are still in the optimum planting window and still have time to get the rice crop planted on time. This just seems to be one of those years where we can’t plant based off of the calendar.
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