R. Keith Collins | 8/6/2013 12:41:31 AM
Each year soybean producers must decide the optimum time to stop irrigating soybeans. Research has shown that failing to provide adequate moisture through maximum dry weight accumulation can result in as much as 10 bu/acre yield loss. A good rule of thumb for terminating irrigation is to determine if 50% or more of the upper two pods on plants have seeds that are touching within the pod. This will usually correspond with R6 – R6.5 growth stages on Group IV varieties. At this point, if there is good soil moisture then irrigation can be ended. If soil moisture is dry or becoming dry with little or no chance of rain then soybeans will benefit from a final irrigation.
If after opening pods not all seeds have separated from membrane, then an application of harvest aids will result in some yield loss. These recommendations are based on earliest application timing without sacrificing yield. Producers will need to decide if yield loss from earlier applications can be offset by other benefits associated with early harvest.
Below is cotton acreage mapped by the Boll Weevil Eradication Program.
Parish: Mapped Acres
2013 State Total 127,575.19
2012 State Total 225,760.26
2011 State Total 284,964.00