NC Small Grain Growers Association Wheat Seeding Rate Trial July 2, 2013

Transcription

1 NC Small Grain Growers Association Wheat Seeding Rate Trial July 2, 2013 SG Purpose: To compare current standard seeding rates in eastern North Carolina to differing rates. Crop response to each seeding rate was studied. Trial Summary: This trial was planted on November 19 with Dynagro Shirley. The trial was planted as a randomized complete block design with 4 reps. The plots were 6 wide and 40 long. Plots were planted with a 6 Great Plains seed drill with nine 7.5 inch drills. The trial was harvested on June 13 with a K2 Gleaner equipped with a Harvest Master Grain Gauge. Lime and fertilizer was applied preplant based on soil samples and NCDA recommendations. All other maintenance applications and fertilizer applications are listed on the attached Activity Log. The treatments are listed below in Table 1. Data Summary: Table 1. Treatment List Treatment 1 900,000 Seeds/A 2 1,200,000 Seeds/A 3 1,500,000 Seeds/A 4 1,800,000 Seeds/A 5 2,100,000 Seeds/A Early season data is listed below in Table 2. In this trial, seeding rate had no effect on early season vigor. Final plant stands were on target with intended planting rate, however when looking at tiller numbers on March 18 there were no differences among the treatments. Vigor was a rated with a 1-5 scale with 1 being very good and 5 being poor. Table 2. Early Season Data 12/18/ /18/2013 3/18/2013 Treatment Plants/A Vigor Tillers/ft 2 900,000 Seeds/A e 1.5 a a 1,200,000 Seeds/A d 2.3 a a 1,500,000 Seeds/A c 2 a 98.8 a 1,800,000 Seeds/A b 2 a 97.8 a 2,100,000 Seeds/A a 2 a a

2 Means followed by same letter do not significantly differ (P=.10, LSD) Pre harvest data is listed below in Table 3. In looking at final plant height, heads per square foot, head length, and kernels per 5 heads; there were no significant differences among treatments. Table 3. Pre-Harvest Data 6/7/2013 Treatment Height (in.) Heads/ft 2 Head Length (In.) Kernels/5 Heads 900,000 Seeds/A 37.6 a 39.4 a 2.7 a a 1,200,000 Seeds/A 37.1 a 41.1 a 2.7 a a 1,500,000 Seeds/A 36.7 a 38.4 a 2.7 a 204 a 1,800,000 Seeds/A 37 a 41.8 a 2.7 a 199 a 2,100,000 Seeds/A 37.4 a 42.4 a 2.5 a a Means followed by same letter do not significantly differ (P=.10, LSD) Harvest data is presented below in Table 4. In this trial there were no significant differences among the treatments when comparing % moisture, test weight or dry yield. Conclusions: Table 4. Harvest Data 6/13/2013 Treatment % Moisture Test Weight Dry Yield 900,000 Seeds/A 13.4 a 62.2 a a 1,200,000 Seeds/A 12.9 a 60.2 a a 1,500,000 Seeds/A 13.4 a 62.2 a a 1,800,000 Seeds/A 12.5 a 59.2 a a 2,100,000 Seeds/A 12.9 a 62.4 a 114 a Means followed by same letter do not significantly differ (P=.10, LSD) In this trial, there were no differences among the different seeding rates when comparing any aspect of the crop that was rated. Therefore, one may conclude that under adequate conditions for tillering, there will not be an advantage in using higher seeding rates. Tillering was similar and adequate in all of these seeding rates at this planting date. Because of this there were no differences in height, number of heads, head size, or kernels per head. And because all of these numbers were similar, yield was also similar among all treatments. The results would likely have been different if this trial had been planted later, or conducted under different growing conditions, or with a different variety. If fall and spring tillering are poor then the higher seeding rates often have more tillers and more potential for higher yields. This was not the case under the circumstances of this trial, and thus a well timed planting date offers no room for improvement when comparing these plant populations and this variety. Page 2

3 Jul (SG ) AOV Means Table Page 1 of 6 Small Grain Growers Seeding Rate Trial Trial ID: SG Protocol ID: SG Location: IMPACT Research Farm Study Director: Allen Hubers Project ID: Investigator: William R. Peele Sponsor Contact: Crop Code TRZAW TRZAW TRZAW TRZAW TRZAW TRZAW TRZAW BBCH Scale BCER BCER BCER BCER BCER BCER BCER Crop Scientific Name Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Crop Name Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Part Rated PLOT - PLANT - TILLER - PLANT - HEAD - HEAD - KERNEL - Rating Date Dec Dec Mar Rating Type EMERGE VIGOR COUNT HEIGHT COUNT LENGTH COUNT Rating Unit /acre 1-5 /ft2 IN /ft2 IN NUMBER Sample Size, Unit 5 HEAD Number of Subsamples Trt Treatment No. Name ,000 Seeds/A e 1.5 a a 37.6 a 39.4 a 2.7 a a 2 1,200,000 Seeds/A d 2.3 a a 37.1 a 41.1 a 2.7 a a 3 1,500,000 Seeds/A c 2.0 a 98.8 a 36.7 a 38.4 a 2.7 a a 4 1,800,000 Seeds/A b 2.0 a 97.8 a 37.0 a 41.8 a 2.7 a a 5 2,100,000 Seeds/A a 2.0 a a 37.4 a 42.4 a 2.5 a a LSD (P=.10) Standard Deviation CV Bartlett's X P(Bartlett's X2) Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.10, LSD) Mean comparisons performed only when AOV Treatment P(F) is significant at mean comparison OSL. Missing data estimates = Yates (9, 10, 11)

4 Jul (SG ) AOV Means Table Page 2 of 6 Crop Code BBCH Scale Crop Scientific Name Crop Name Part Rated Rating Date Rating Type Rating Unit Sample Size, Unit Number of Subsamples Trt Treatment No. Name 1 900,000 Seeds/A 2 1,200,000 Seeds/A 3 1,500,000 Seeds/A 4 1,800,000 Seeds/A 5 2,100,000 Seeds/A LSD (P=.10) Standard Deviation CV Bartlett's X2 P(Bartlett's X2) TRZAW TRZAW TRZAW TRZAW BCER BCER BCER BCER Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Winter wheat Winter wheat Winter wheat Winter wheat PLOT - PLOT - PLOT - PLOT - LODGIN CONMOI WEITES YIELD % % LB bu/ac a 13.4 a 62.2 a a 0.0 a 12.9 a 60.2 a a 0.0 a 13.4 a 62.2 a a 0.0 a 12.5 a 59.2 a a 0.0 a 12.9 a 62.4 a a * Replicate F Replicate Prob(F) Treatment F Treatment Prob(F)

5 Jul (SG ) AOV Means Table Page 3 of 6 Small Grain Growers Seeding Rate Trial Trial ID: SG Protocol ID: SG Location: IMPACT Research Farm Study Director: Allen Hubers Project ID: Investigator: William R. Peele Sponsor Contact: Crop Code TRZAW, BCER, Triticum aestivum (winter), = US Part Rated PLOT = plot PLANT = plant TILLER = tiller HEAD = head KERNEL = kernel Rating Type EMERGE = emergence VIGOR = vigor COUNT = count HEIGHT = height LENGTH = length LODGIN = lodging CONMOI = content - moisture WEITES = weight - test YIELD = yield Rating Unit /acre = per acre 1-5 = 1-5 index/scale /ft2 = per square foot IN = inch NUMBER = number % = percent LB = pound bu/ac = bushels per acre HEAD = head

6 Jul (SG ) Assessment Data Summary Page 4 of 6 Small Grain Growers Seeding Rate Trial Trial ID: SG Protocol ID: SG Location: IMPACT Research Farm Study Director: Allen Hubers Project ID: Investigator: William R. Peele Sponsor Contact: Crop Code TRZAW TRZAW TRZAW TRZAW TRZAW TRZAW TRZAW BBCH Scale BCER BCER BCER BCER BCER BCER BCER Crop Scientific Name Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Crop Name Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Winter wheat Part Rated PLOT - PLANT - TILLER - PLANT - HEAD - HEAD - KERNEL - Rating Date Dec Dec Mar Rating Type EMERGE VIGOR COUNT HEIGHT COUNT LENGTH COUNT Rating Unit /acre 1-5 /ft2 IN /ft2 IN NUMBER Sample Size, Unit 5 HEAD Number of Subsamples Trt Treatment No. Name Plot ,000 Seeds/A Mean = ,200,000 Seeds/A Mean = ,500,000 Seeds/A Mean = ,800,000 Seeds/A Mean = ,100,000 Seeds/A Mean =

7 Jul (SG ) Assessment Data Summary Page 5 of 6 Crop Code BBCH Scale Crop Scientific Name Crop Name Part Rated Rating Date Rating Type Rating Unit Sample Size, Unit Number of Subsamples Trt Treatment No. Name Plot 1 900,000 Seeds/A TRZAW TRZAW TRZAW TRZAW BCER BCER BCER BCER Triticum aesti> Triticum aesti> Triticum aesti> Triticum aesti> Winter wheat Winter wheat Winter wheat Winter wheat PLOT - PLOT - PLOT - PLOT - LODGIN CONMOI WEITES YIELD % % LB bu/ac Mean = 2 1,200,000 Seeds/A Mean = 3 1,500,000 Seeds/A Mean = 4 1,800,000 Seeds/A Mean = 5 2,100,000 Seeds/A Mean = * 59.4* 105.6* * 60.9* 115.5*

8 Jul (SG ) Assessment Data Summary Page 6 of 6 Small Grain Growers Seeding Rate Trial Trial ID: SG Protocol ID: SG Location: IMPACT Research Farm Study Director: Allen Hubers Project ID: Investigator: William R. Peele Sponsor Contact: Crop Code TRZAW, BCER, Triticum aestivum (winter), = US Part Rated PLOT = plot PLANT = plant TILLER = tiller HEAD = head KERNEL = kernel Rating Type EMERGE = emergence VIGOR = vigor COUNT = count HEIGHT = height LENGTH = length LODGIN = lodging CONMOI = content - moisture WEITES = weight - test YIELD = yield Rating Unit /acre = per acre 1-5 = 1-5 index/scale /ft2 = per square foot IN = inch NUMBER = number % = percent LB = pound bu/ac = bushels per acre HEAD = head

9 11/7/2012 (SG ) Trial Map Page 1 of 1 Small Grain Growers Seeding Rate Trial Trial ID: SG Protocol ID: SG Location: IMPACT Research Farm Study Director: Allen Hubers Project ID: Investigator: William R. Peele Sponsor Contact: Trt Trt Code Trt Description 1 900,000 Seeds/A 2 1,200,000 Seeds/A 3 1,500,000 Seeds/A 4 1,800,000 Seeds/A 5 2,100,000 Seeds/A

10 Field Activity Log Date Activity Data Comments Block 3 / SG /13/2013 Harvest Area Harvested=0.25 acres 5/1/2013 Apply Trt. QUILT XCEL/14 oz. (fluid) per acre 4/24/2013 Apply Trt. KARATE Z/1.9 oz. (fluid) per acre; SYNTACT/1 pints per 100 gal. 3/11/2013 Apply Trt. 30% Nitrogen/28 gallons per acre 3/7/2013 Apply Trt. HARMONY EXTRA SG/0.65 oz. (dry) per acre; COVERALL/1 quarts per 100 gal. 12/8/2012 Apply Trt. KARATE Z/Broadcast/1.9 oz. (fluid) per acre; SYNTACT/Broadcast/1 pints per 100 gal. 11/19/2012 Plant Wheat, Winter; DG Shirley; Area Planted=0.25 acres 11/16/2012 Apply Trt /Broadcast/4.5 gallons per acre; S/Broadcast/11 gallons per acre 11/8/2012 Field Cultivate Field Cultivate Printed on 7/7/2013 Page 1