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⚠️ Information and Updates Regarding COVID-19's Impact on the College of Agricultural Sciences

Trial Updates

Last Updated on August 13th

Widespread rainfall across the eastern half of Colorado in May delayed planting for many crops, but hot and dry weather has been prevalent across most of eastern Colorado in June and July except in the southeast corner (60-day rainfall totals for the state can be viewed here).  All trial sites are marked in Google maps and can be found here, and if you are planning to visit the trials during the growing season, please email Sally to get plot maps at sally.jones@colostate.edu.

Forage Sorghum:

Rocky Ford irrigated: Planted June 8th (on research station, please make appt. with Kevin Tanabe kevin.tanabe@colostate.edu).  Station received 4 inches of rain in May.  Excellent stands and good growth. Irrigation is being kept up since little rain has been received in June/July.  No hail, photo included.

Walsh dryland:  Planted June 7th into moisture (on research station, please make appt. with Kevin Larson kevin.larson@colostate.edu).  Has a good stand/emergence.  Had 6.5” of rain in May, but June has been hot and dry.  Still good subsoil moisture at end of June.  Location received 4” of rainfall in July, and the forage trial has good growth, although entries were all still in vegetative growth stage at end of July.

Grain Sorghum:

Akron dryland: Planted May 28th (on research station please make appt. with Sally).  Good stands and emergence, heavy wheat stubble in field, good moisture.  Plants at V5 on June 30th.   Very little rain received in June and July (0.2” from mid-July to mid-Aug), and hot and dry conditions.  Most hybrids are still holding on and are not showing drought stress yet. Trial was starting to flower in early August.  No hail.  Photo included.

Sheridan Lake dryland:  Planted May 29th into good moisture and heavy wheat residue.  Excellent stands and emergence.  Growth stage on June 30th was V5.  Trial received 4.7” of rainfall in July, good growth and no hail.  Trial was flowering at end of July.  Photo included.

Seibert dryland:  Planted May 29th into good moisture and wheat residue.  Excellent stands and emergence.  Trial has received about 1.5” of rain from mid-July through mid-August, good growth and no hail.  Photo included.

Walsh dryland and sub-surface drip irrigation trials:  dryland planted June 4th and irrigated on June 7th, into moisture (on research station, please make appt. with Kevin Larson kevin.larson@colostate.edu).  Has a good stand/emergence.  Had 6.5” of rain in May, but June has been hot and dry.  Still good subsoil moisture at end of June.  Location received 4” of rainfall in July, and grain sorghum hybrids were starting to head in both dryland and irrigated trials at end of July.  Everything looking good.

Last Updated: August 19th

Widespread rainfall across the eastern half of Colorado in May delayed planting for many crops, but hot and dry weather has been prevalent across most of eastern Colorado in June and July except in the southeast corner (60-day rainfall totals for the state can be viewed here).  All trial sites are marked in Google maps and can be found here, and if you are planning to visit the trials during the growing season, please email Sally to get plot maps at sally.jones@colostate.edu.  All trials are marked with pink Crops Testing flags at the corners and orange plot stakes within the trials.

Dryland trials were planted at 18,900 seeds/ac for oil hybrids and 15,400 seeds/ac for confection hybrids.  Irrigated trials were planted at 24,800 seeds/ac for oil hybrids and 19,900 seeds/ac for confection hybrids.

Burlington Irrigated:  Planted on June 11th.  Seedlings just starting to emerge on June 17th.  Good stands and about 6″ tall on June 30th.  Volunteer corn was sprayed in July.  Plants just starting to flower (R-4).  No hail, photo included.

Prospect Valley Irrigated:  Planted on June 12th.  Flood irrigated and stand is variable due to dryer conditions at planting.  Trial received rain in early July which helped emergence, plots on south end have young plants that emerged late.  Most plants were at R4 growth stage on Aug. 6th.  No hail, photo included.

Julesburg Dryland:  Planted on June 2nd into moisture and corn residue. Stand is average to good, plants were about a foot tall on June 29th.  Plants were at R-3 growth stage on July 28th, no hail and excellent weed control.  Photo included.

Sheridan Lake Dryland:  Planted on June 11th.  Planted into moisture at 1.75” depth.  Very good stand and weed control, moisture at 2″ below soil surface on June 30th.  Trial field sprayed on Aug. 12th for insect pests, plants at R4 growth stage.  No hail, photo included.

Last Updated on August 9th

Widespread rainfall across the eastern half of Colorado in May delayed planting for many crops, but hot and dry weather has been prevalent across most of eastern Colorado in June and July except in the southeast corner (60-day rainfall totals for the state can be viewed here).  All trial sites are marked in Google maps and can be found here, and if you are planning to visit the trials during the growing season, please email Sally to get plot maps at sally.jones@colostate.edu.  All trials are marked with pink Crops Testing flags at the corners and orange plot stakes within the trials.

Important Note: Our originally planned Julesburg irrigated site was moved northeast of Sterling in the South Platte river basin (also irrigated) due to unforeseen circumstances.

Akron dryland: Planted May 21st (on research station please make appt. with Sally).  On Aug. 9th trial was at blister stage/R2. Very little rain received since mid-June, 0.42” total for the month of July.  Plants are showing signs of drought stress.  Excellent stands and emergence, heavy wheat stubble in field, no hail.  Photo included.

Julesburg dryland:  Planted May 20th.  On July 29th, plants were at tasseling and not showing symptoms of drought stress.  At V6 growth stage on June 29th, about 20” tall.  Good emergence and stand establishment, planted into moisture and still good moisture in soil profile.  In heavy wheat stubble.  Photo included.

Burlington irrigated:  Planted May 4th.  On July 27th, plants were at R1/silking stage.  Hail damage sustained around V8 (pre-tasseling) as top 2-3 leaves are okay, but rest are shredded.  Light stalk bruising from hail as well.  Plants were V3 stage on June 7th.  Cultivated on June 9th to control volunteer corn.  Photo included.

Fruita irrigated grain & silage trials: Planted May 18th (on research station, please make appt with Perry Cabot perry.cabot@colostate.edu).  Early August trial looked really good but some spider mite pressure.  Good emergence and stand establishment/early growth.

Holyoke irrigated: Planted May 4th.  At silking/late R1 stage on July 28th.  No hail damage or disease noted.  At V7 growth stage on June 24th.  About 3’ tall and no hail damage.  Photo included.

Rocky Ford irrigated: Planted May 14 (on research station, please make appt. with Kevin Tanabe kevin.tanabe@colostate.edu).  On July 30th, plants were at silking/late R1 stage.  Irrigation is being kept up since little rain has been received in June/July.  Station received 4 inches of rain in May.  Excellent stands and good growth, photos of both silage and grain trials included.  No hail.

Sterling irrigated: Planted May 20th.  On July 29th plants were at silking growth stage.  No hail damage, but some greensnap plants noted in the trial from a recent storm (<10% except for a couple plots where ~60% of plants were snapped).  At V7 stage and 40” tall by end of June.  Lower leaves are shredded from hail in early June.  First irrigation (via flood) to be applied June 29th.  Photo included.

Wiggins irrigated: Planted May 15th.  On Aug. 6th plants were at blister growth stage.  No hail damage.  At V7 stage and about 2.5 feet tall on June 25.  Photo included.

Yuma irrigated: Planted May 7th.  On July 27th, plants were at R2 stage/blister, no hail damage, no disease noted.  Plants were V7 stage on June 24th and roughly 3 feet tall.  Photo included.

Trial Photos

Akron dryland milo Aug. 9th
Sheridan Lake dryland milo August 12th
Rocky Ford irrigated forage sorghum July 30th
Seibert dryland milo August 12th
Prospect Valley Irrigated Sunflowers Aug. 6th
Julesburg Dryland Sunflowers July 28th
Sheridan Lake Dryland Sunflowers Aug. 19th
Burlington Irrigated Sunflowers Aug. 19th
Akron dryland Aug. 9th
Julesburg dryland July 29th
Burlington irrigated July 27th
Holyoke irrigated July 28th
Rocky Ford irrigated July 30th
Rocky Ford irrigated silage July 30th
Sterling irrigated July 29th
Wiggins irrigated August 6th
Yuma irrigated July 27th
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