Crops, Irrigation


Crop ET Weekly Report
Today I helped install an ETgage and Watermark Sensors for a couple producers with the assistance of an Intern who will be assisting me with irrigation tasks and working with area producers. Jordan Wachal started in our office after Memorial Day and will be specifically working with producers to help evaluate irrigation system efficiencies and offer any suggestions for improvement. Jordan comes from Schuyler, Nebraska and is working on his Bachelor of Science in Civil Engineering from the University of Nebraska-Lincoln.
The ETgage I check outside of Geneva changed 1.4 inches for the week of May 26-June 1st. Corn in the V-6 stage has a coefficient of .36”. To calculate how much water, corn at V-6 stage used you simply multiply .36” x 1.4” for a weekly use of .49” or .07 inches/day. Corn at or approaching V-8 would have used .71”/week or .10” per day. Producers with Watermark sensors, which monitor the amount of water available in the soil profile should get them installed soon. Watermark sensors are installed early in the growing season at 1’, 2’, 3’ and in some case 4’ depths! For more information about ETgages and Watermark sensors, check out the NAWMN website.

Forecasting Stalk Borer Growth Stage

Bob Wright, Extension Entomologist provided a short update on UNL’s CropWatch website on stalk borer development. Wright estimated stalk borer development indicates that growers from southwest to northeast Nebraska should be making treatment decisions based on field scouting. He pointed out that, based on research at Iowa State University, stalk borer egg hatch begins at about 575 DD and ends at 750 DD. Scouting should begin when 1,300-1400 DD have accumulated. This corresponds with the beginning of larvae moving out of grassy hosts. Determine the need for treatment when 1,400-1,700 DD have accumulated.

As I write this, Fillmore County accumulated a range of 1800-1900 degree days. For more information on stalk borer life cycle and scouting recommendations, see the May 11, 2012 CropWatch article, Timetable for Common Stalk Borer Scouting Moves Up.

Average Crop Revenue Election (ACRE) Production Certifications

Farms that are enrolled in ACRE must provide their 2011 production certification to FSA by July 15, 2012. A benchmark yield must also be established for farms that elected ACRE in 2011, or if this was the first year a certain commodity was planted since the farm elected ACRE in 2009. Establishment of the benchmark yield requires a certification of historic production for the 2006 thru 2010 crop years. Failure to certify 2011 actual production and applicable 2006-2010 benchmark production by July 15, 2012, will result in ineligibility for all 2012 ACRE payments, including the direct payments.

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