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2017 Dodge County Crop Tech Cafe Yield Tour

Filed under  Cropping Systems, Diseases, Soil Fertility, Weather

2017 Dodge County Crop Tech Cafe Yield Tour: September 5-7

with Nathan Mueller

2017 Dodge County Yield Tour Map, Routes, and Soil Associations

As a reminder, here is my methodology…

Crop Tech Cafe Corn Yield Estimation Method:

  1. Stop at random fields along a predetermined driving route through Dodge County (map above).
  2. Walk past all end rows and then walk at least another 60 feet or more into the field.
  3. Measure out an area 1/1,000 of an acre based on the row width. For 30-inch rows, this equates to a 17′ 5″ row length.
  4. Pull back husks on every 5th ear for dryland fields and on every 6th ear for irrigated fields in row 1.
  5. Repeat step 4 for the adjacent row or row 2 to average across row-units of the planter.
  6. Count the total number of corn ears in both row 1 and row 2.
  7. Count the number of kernel rows and kernels within a row or length.  Only continuous rows counted, so some kernels at the base and tip of an ear are not counted.
  8. Calculate kernels per ear from average of 5 ears, then kernels per ear * total ears / kernel weight (75K) = bushels/acre for row 1 and repeat for row 2.
    1. Example: 560 kernels per ear * 33 / 75 = 246 bu/ac
  9. Average the yield estimates from row 1 and row 2 to get a final estimate. (Note: Yield estimates are from a small area within the field, not the entire field)

 

Crop Tech Cafe Soybean Yield Estimation Method:

Step-by-step printable guide and calculator: Estimating Soybean Yield

  1. Stop at random fields along a predetermined driving route through Dodge County (map above).
  2. Walk past all end rows and then walk at least another 60 feet or more into the field.
  3. Measure out an area 1/10,000 of an acre based on the row width. For 30-inch rows, this equates to a 21″ row length and for 15-inch rows this equates to two 21″ row lengths for adjacent rows.
  4. Use a pruning shears to cut all soybean plants at the base in this 1/10,000 of an acre and carry them back to the pickup bed.
  5. Count the total number or sum of pods on all plants.
  6. Count the number of seeds per pod in all pods on two representative plants in the sample.
  7. Multiply total pods per 1/10,000 of an acre by the average number of seeds per pod and divide by 18 (factor for 3,000 seeds/lbs) to get the yield estimate at 13% moisture.
  8. Yield estimates below include preharvest/harvest loss (15%) and moisture loss (harvested at 9% moisture) factor. (Note: Yield estimates are from a small area within the field, not the entire field).

 

2017 Crop Yield Tour Summary

Dates of Previous Yield Tours:

The 2017 corn preharvest yield estimate was 197 bu/ac, which is up 13 bu/ac from a year ago and similar to 2015 (Table 1 below). Irrigated and rainfed yields averaged 224 bu/ac and 173 bu/ac, respectively. Irrigated yields were 12 bu/ac and 15 bu/ac higher than 2016 and 2015, respectively. However, rainfed yields are up 6 bu/ac from 2016, but 15 bu/ac less than 2015. Ear counts across the county averaged 28,200/acres, which is up from 2016 (July 5 Wind Storm impacted 75,000 acres with green snap) and similar to 2015. Corn maturity is behind from last year but ahead of 2015 (tours roughly the same time each year, so not a perfect comparison).

Table 1. Summary of Dodge County Yield Tours for Corn
Crop Year Tillage % Maturity (Growth Stage) Ear Count (k/acre) Rows of Kernels Length of rows (kernels) Kernel Weight Factor Final (bu/ac) USDA Dodge County Survey
2017 59% 5.5 28.2 16.2 33.5 78 197 199.3
Irrigated 50% 5.5 30.6 16.4 33.4 74 224 NA
Dryland 67% 5.6 26.0 16.1 33.5 81 173 NA
                 
2016 53% 5.7 25.6 17.0 33.8 79 184 174.8
Irrigated 63% 5.7 27.6 17.1 34.4 76 212 194.8
Dryland 44% 5.6 23.8 17.0 33.2 81 167 167.8
                 
2015 53% 5.3 27.8 15.7 34.2 75 197 195
Irrigated 57% 5.4 31.0 15.9 31.8 75 209 209
Dryland 50% 5.2 25.6 15.6 35.9 76 188 190

The 2017 soybean preharvest yield is estimated at 56 bu/ac for the county (averaged across rainfed and irrigated), down 7 bu/ac from a year ago and down 2 bu/ac from 2015 (Table 2 below). The county average for pods per 1/10,000 of acre was down nearly 100 pod from 2016 but similar to the pod count in 2015. Seeds per pod was 2.5 that is similar to the 2.4 in 2016 and 2.6 in 2015. Maturity was only slightly behind from last year, but ahead of 2015 similar to corn.

Table 2. Summary of Dodge County Yield Tours for Soybeans
Crop Year Tillage % Row Spacing (inches) Maturity (Growth Stage) Pods per 1/10,000 Acre Seeds per Pod Estimated Seed Size Preharvest Yield Estimate (bu/ac) USDA Dodge County Yield Survey
2017 47% 24 6.0 497 2.5 3000 56 60.7
2016 59% 21 6.1 602 2.4 3166 63 60.3
2015 38% 24 5.9 507 2.6 3000 58 59.7

 

Table 3. 2017 Corn Preharvest Yield Estimates by Stop

Stop Region Irrigated Maturity (stage) Ear Count (k/acre) Rows of Kernels Length of rows (kernels) Kernel Weight Factor Final (bu/ac)
2 Platte River Valley Yes 5.66 28.5 15.8 33.1 75 198
3 Platte River Valley No 5.75 23.5 19.2 26.9 85 141
6 Platte River Valley Yes 5.5 25.5 16.2 36.9 70 218
7 Platte River Valley Yes 5.5 31.5 16.4 31.3 75 215
9 Fillmore Flats No 5.5 29.5 16.4 32.9 80 198
11 Fillmore Flats Yes 5.5 33.0 16.4 34.6 75 249
13 Fillmore Flats Yes 5.5 32.0 16.2 34.1 75 235
15 Fillmore Flats No 5.75 27.0 15.6 35.9 80 189
18 Nora Hills No 5.5 28.5 15.4 30.2 80 165
19 Nora Hills No 5.33 22.0 17.0 36.5 80 182
21 Nora Hills Yes 5.33 32.0 16.6 32.0 75 226
23 Thurman Dunes Yes 5.5 28.0 16.0 35.5 75 212
26 Moody Hills No 5.75 24.0 15.4 34.3 80 158
27 Moody Hills No 5.5 23.0 15.6 37.4 80 167
28 Moody Hills No 5.33 30.5 14.0 32.1 80 170
31 Elkhorn River Valley No 5.66 26.0 16.0 35.3 80 183
32 Elkhorn River Valley Yes 5.5 34.5 17.4 29.8 75 237
  2017 (County)   5.5 28.2 16.2 33.5 78 197
  Irrigated   5.5 30.6 16.4 33.4 74 224
  Dryland   5.6 26.0 16.1 33.5 81 173

 

Table 4. 2017 Soybean Preharvest Yield Estimates by Stop

Stop Region Irrigated Row Spacing Plant Population (k/acre) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final
1 Platte River Valley Yes 30 150 543 2.3 18 57
4 Platte River Valley Yes 30 80 438 2.5 18 50
5 Platte River Valley Yes 30 150 372 2.4 18 40
8 Platte River Valley No 15 140 528 2.6 18 61
10 Fillmore Flats No 30 80 515 2.7 18 62
12 Fillmore Flats Yes 15 110 558 2.5 18 63
14 Fillmore Flats Yes 30 140 520 2.5 18 58
16 Fillmore Flats No 15 70 645 2.6 18 71
17 Nora Hills No 30 170 565 2.3 18 60
20 Nora Hills No 15 100 508 2.4 18 54
22 Nora Hills Yes 30 200 632 2.8 18 80
24 Thurman Dunes Yes 30 90 463 2.2 17 49
25 Moody Hills No 30 140 532 2.4 18 58
29 Moody Hills No 15 120 427 2.4 18 47
30 Moody Hills No 15 80 436 2.5 18 50
33 Elkhorn River Valley No 30 140 403 2.6 17 49
34 Elkhorn River Valley Yes 15 40 361 2.6 18 39
    2017 24 118 497 2.5 18 56

 

Detailed Reports by Individual Stops Organized by Region

Region 1: Platte River Valley

Stop 1. High variability Gibbon soils (texture and drainage) in this field.

Stop 1: 57 bu/ac soybeans, irrigated, conventional-tilled following corn in 30-inch rows at R6 growth stage.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
1 30 150 543 2.3 18 57

Stop 2. Corn with healthy leaves on this Gibbon silty clay loam soil.

Stop 2: 198 bu/ac corn, irrigated, conventional-tilled following soybeans at 2/3 milk line.

Row 1 – Stop 2   Row 2 (Adjacent Row)
Ear Count 28 A   Ear Count 29 A
  Rows Length     Rows Length
Ear 1 18 32   Ear 1 16 31
Ear 2 14 32   Ear 2 12 39
Ear 3 16 32   Ear 3 16 31
Ear 4 16 32   Ear 4 18 33
Ear 5 16 35   Ear 5 16 34
             
Average Kernels/Ear 522 B   Average Kernels/Ear 520 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 195     Yield (15.5%) 201  

Stop 3. Corn experienced late-season stress on this poorly-drained Luton silty clay soil (low plant available water-holding capacity soil).

Stop 3: 141 bu/ac  corn, rainfed, conventional-tilled following soybeans at 3/4 milk line.

Row 1 – Stop 3   Row 2 (Adjacent Row)
Ear Count 23 A   Ear Count 24 A
  Rows Length     Rows Length
Ear 1 22 24   Ear 1 18 24
Ear 2 16 34   Ear 2 18 31
Ear 3 20 28   Ear 3 20 20
Ear 4 20 27   Ear 4 20 20
Ear 5 18 31   Ear 5 20 30
             
Average Kernels/Ear 546 B   Average Kernels/Ear 478 B
Kernel Weight Factor 85 C   Kernel Weight Factor 85 C
Yield (15.5%) 148     Yield (15.5%) 135  

Stop 4. On great Janude loam soil, just didn’t see the number of pods this year like normal.

Stop 4: 50 bu/ac soybeans, irrigated, conventional-tilled following corn in 30-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
4 30 80 438 2.5 18 50

Stop 5. Grown on poorly-drained Luton silty clay soils. SDS disease symptoms were present in portions of the field. 

Stop 5: 40 bu/ac soybeans, flood-irrigated, conventional-tilled following corn in 30-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
5 30 150 372 2.4 18 40

Stop 6. The heaviest ears on the tour. Long ears on this good Gibbon loam soil. 

Stop 6: 218 bu/ac corn, irrigated, conventional-tilled, following soybeans at 1/2 milk line

Row 1 – Stop 6   Row 2 (Adjacent Row)
Ear Count 26 A   Ear Count 25 A
  Rows Length     Rows Length
Ear 1 16 38   Ear 1 18 36
Ear 2 16 36   Ear 2 16 36
Ear 3 16 38   Ear 3 16 34
Ear 4 16 38   Ear 4 16 36
Ear 5 16 40   Ear 5 16 37
             
Average Kernels/Ear 608 B   Average Kernels/Ear 587 B
Kernel Weight Factor 70 C   Kernel Weight Factor 70 C
Yield (15.5%) 226     Yield (15.5%) 210  

Stop 7: Great kernel depth on this Janude loam soil.

Stop 7: 215 bu/ac corn, flood-irrigated, conventional-tilled, following soybeans, 1/2 milk line

Row 1 – Stop 7   Row 2 (Adjacent Row)
Ear Count 33 A   Ear Count 30 A
  Rows Length     Rows Length
Ear 1 18 35   Ear 1 16 26
Ear 2 14 37   Ear 2 16 27
Ear 3 16 35   Ear 3 16 28
Ear 4 14 34   Ear 4 20 30
Ear 5 18 27   Ear 5 16 34
             
Average Kernels/Ear 534 B   Average Kernels/Ear 488 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 235     Yield (15.5%) 195  

Stop 8. Surprised by this field, mostly disease-free canopy for soybeans-after-soybeans

Stop 8: 61 bu/ac soybeans, rainfed, conventional tillage following soybeans in 15-inch rows

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
8 15 140 528 2.6 18 61

 

Region 2: Fillmore Flats

Stop 9. Not a lot of rainfed corn following corn, but it looked pretty good on this Moody silty clay loam terrace soil. This area did catch more rain in June and July than areas farther west on this stretch.

Stop 9: 198 bu/ac corn, rainfed, conventional-tilled following corn, 1/2 milk line.

Row 1 – Stop 9   Row 2 (Adjacent Row)
Ear Count 30 A   Ear Count 29 A
  Rows Length     Rows Length
Ear 1 18 29   Ear 1 16 34
Ear 2 16 34   Ear 2 18 26
Ear 3 14 31   Ear 3 16 37
Ear 4 18 32   Ear 4 16 36
Ear 5 18 33   Ear 5 14 37
             
Average Kernels/Ear 534 B   Average Kernels/Ear 540 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 200     Yield (15.5%) 196  

Stop 10. High number of seeds per pod at 2.7 on this rainfed no-till field.

Stop 10: 62 bu/ac soybeans, rainfed, no-till, following corn in 30-inch rows

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
10 30 80 515 2.7 18 62

Stop 11. Highest corn yield estimate on the tour. Even if the field doesn’t average this,  there is some very good spots like this out there. 

Stop 11: 249 bu/ac corn, irrigated, no-till after soybeans, 1/2 milk line.

Row 1 – Stop 11   Row 2 (Adjacent Row)
Ear Count 34 A   Ear Count 32 A
  Rows Length     Rows Length
Ear 1 16 34   Ear 1 16 36
Ear 2 14 40   Ear 2 16 33
Ear 3 18 35   Ear 3 16 33
Ear 4 16 34   Ear 4 18 33
Ear 5 16 35   Ear 5 18 33
             
Average Kernels/Ear 568 B   Average Kernels/Ear 564 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 257     Yield (15.5%) 241  

No picture for Stop 12

Stop 12: 63 bu/ac soybeans, no-till, following seed corn, 15-inch rows. No picture, but yield will be reduced by some SDS disease symptoms in areas.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
12 15 110 558 2.5 18 63

Stop 13. Another great looking irrigated field in central Dodge County.

Stop 13: 235 bu/ac corn, irrigated, no-till following soybeans at 1/2 milk line

Row 1 – Stop 13   Row 2 (Adjacent Row)
Ear Count 32 A   Ear Count 32 A
  Rows Length     Rows Length
Ear 1 16 32   Ear 1 16 38
Ear 2 16 37   Ear 2 16 34
Ear 3 18 32   Ear 3 14 34
Ear 4 14 35   Ear 4 18 32
Ear 5 18 30   Ear 5 16 37
             
Average Kernels/Ear 542 B   Average Kernels/Ear 559 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 231     Yield (15.5%) 239  

Stop 14. SDS symptoms are more widespread this year (higher occurrence) across the Fillmore Flats in Central Dodge County than 3 years ago.

Stop 14:  58 bu/ac soybeans, irrigated, conventional-tilled following corn in 30-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
14 30 140 520 2.5 18 58

Stop 15. This area did catch less rain in June and July than areas farther west on this stretch through central Dodge County. One of the more mature fields too on the tour at 3/4 milk line.

Stop 15: 189 bu/ac corn, rainfed, conventional-tilled following soybeans, 3/4 milk line.

Row 1 – Stop 15   Row 2 (Adjacent Row)
Ear Count 26 A   Ear Count 28 A
  Rows Length     Rows Length
Ear 1 16 33   Ear 1 18 35
Ear 2 14 38   Ear 2 16 40
Ear 3 16 32   Ear 3 14 30
Ear 4 16 36   Ear 4 16 38
Ear 5 14 42   Ear 5 16 35
             
Average Kernels/Ear 547 B   Average Kernels/Ear 572 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 178     Yield (15.5%) 200  

Stop 16. Even with a little Frogeye Leaf Spot, this was the highest yield estimate on the tour  for rainfed conditions. It had 645 pods in 1/10,000 of an acre even with lower plant populations.

Stop 16: 71 bu/ac soybeans, rainfed, no-till following corn, 15-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
16 15 70 645 2.6 18 71

 

Region 3: Nora Hills

Stop 17. Very healthy leaf canopy at the top of this field on Belfore silty clay loam soils. One of the few fields that was not lodged, easy walking!

Stop 17: 60 bu/ac soybeans, conventional-tilled, following corn, 30-inch rows. 

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
17 30 170 565 2.3 18 60

Stop 18. Some earlier yield potential lost in July at this stop on an Nora silty clay loam hillside.

Stop 18: 165 bu/ac corn, rainfed, no-till following soybeans, 1/2 milk line.

Row 1 – Stop 18   Row 2 (Adjacent Row)
Ear Count 28 A   Ear Count 29 A
  Rows Length     Rows Length
Ear 1 14 30   Ear 1 16 34
Ear 2 14 31   Ear 2 16 31
Ear 3 12 31   Ear 3 16 31
Ear 4 14 29   Ear 4 18 29
Ear 5 16 32   Ear 5 18 24
             
Average Kernels/Ear 429 B   Average Kernels/Ear 498 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 150     Yield (15.5%) 181  

Stop 19. Not much southern rust on the tour this year given we starting seeming some the end of July. Weather conditions in August helped suppress the potential problem.

Stop 19: 182 bu/ac corn, rainfed, conventional-tilled following soybeans, 1/3 milk line.

Row 1 – Stop 19   Row 2 (Adjacent Row)
Ear Count 21 A   Ear Count 23 A
  Rows Length     Rows Length
Ear 1 16 36   Ear 1 18 32
Ear 2 18 43   Ear 2 18 40
Ear 3 16 39   Ear 3 18 35
Ear 4 18 36   Ear 4 14 35
Ear 5 18 34   Ear 5 16 35
             
Average Kernels/Ear 647 B   Average Kernels/Ear 595 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 181     Yield (15.5%) 183  

Stop 20. White mold was more of a problem this year, even on some hillsides.

Stop 20: 54 bu/ac soybeans, rainfed, no-till following corn, 15-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
20 15 100 508 2.4 18 54

Stop 21. Only no-till corn-after-corn field captured by the yield tour.

Stop 21: 226 bu/ac corn, irrigated, no-till following corn, 1/3 milk line.

Row 1 – Stop 21   Row 2 (Adjacent Row)
Ear Count 31 A   Ear Count 33 A
  Rows Length     Rows Length
Ear 1 16 33   Ear 1 16 30
Ear 2 16 33   Ear 2 16 35
Ear 3 18 32   Ear 3 16 33
Ear 4 18 31   Ear 4 16 33
Ear 5 18 31   Ear 5 16 29
             
Average Kernels/Ear 550 B   Average Kernels/Ear 512 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 227     Yield (15.5%) 225  

Stop 22. Highest yield estimate on the tour with both a high pod county and seeds per pod. Plenty of 4-seed pods at this stop.

Stop 22: 80 bu/ac soybeans, irrigated, no-till following corn in 30-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
22 30 200 632 2.8 18 80

 

Region 4: Thurman Dunes

Stop 23. A really great irrigated yield for this Thurman loamy sand.

Stop 23: 212 bu/ac corn, irrigated, no-till following soybeans at 1/2 milk line.

Row 1 – Stop 23   Row 2 (Adjacent Row)
Ear Count 29 A   Ear Count 27 A
  Rows Length     Rows Length
Ear 1 16 37   Ear 1 16 38
Ear 2 16 39   Ear 2 16 36
Ear 3 16 27   Ear 3 16 34
Ear 4 16 32   Ear 4 16 36
Ear 5 16 36   Ear 5 16 40
             
Average Kernels/Ear 547 B   Average Kernels/Ear 589 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 212     Yield (15.5%) 212  

Stop 24. Some sunscald on these leaves, this is not a pathogen, just an environmental issue. These beans are on a Liesy fine sandy loam soil.

Stop 24: 49 bu/ac soybeans, irrigated, no-till following corn in 30-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
24 30 90 463 2.2 17 49

 

Region 5: Moody Hills

Stop 25. Noticed more frogeye leaf spot in soybeans this year, especially in the Moody Hills region.

Stop 25: 58 bu/ac soybeans, rainfed, conventional-tilled after corn, 30-inch row.s

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
25 30 140 532 2.4 18 58

Stop 26. Blacklayer isn’t to far off with the warmer forecast in the near term.

Stop 26: 158 bu/ac corn, rainfed, no-till after soybeans at 3/4 milk line.

Row 1 – Stop 26   Row 2 (Adjacent Row)
Ear Count 23 A   Ear Count 25 A
  Rows Length     Rows Length
Ear 1 16 35   Ear 1 16 34
Ear 2 16 31   Ear 2 14 35
Ear 3 18 35   Ear 3 14 32
Ear 4 16 34   Ear 4 16 36
Ear 5 14 39   Ear 5 14 32
             
Average Kernels/Ear 555 B   Average Kernels/Ear 501 B
Kernal Weight Factor 80 C   Kernal Weight Factor 80 C
Yield (15.5%) 160     Yield (15.5%) 157  

Stop 27. This is the second field on the tour that was rainfed corn after corn.  This is on a Nora silt loam at 11-17% slopes.

Stop 27: 167 bu/ac corn, rainfed, conventional-tilled after corn, 1/2 milk line.

Row 1 – Stop 27   Row 2 (Adjacent Row)
Ear Count 24 A   Ear Count 22 A
  Rows Length     Rows Length
Ear 1 14 42   Ear 1 16 35
Ear 2 16 42   Ear 2 16 36
Ear 3 14 33   Ear 3 16 38
Ear 4 16 38   Ear 4 18 33
Ear 5 14 39   Ear 5 16 38
             
Average Kernels/Ear 575 B   Average Kernels/Ear 589 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 173     Yield (15.5%) 162  

Stop 28. Lowest number of kernel rows, averaged 14 around. This field was one of the few there I found a decent amount of aphids beyond the end-rows. This was on an Moody silty clay loam 6-11% hillside.

Stop 28: 170 bu/ac corn, rainfed, no-till after soybeans at 1/3 milk line.

Row 1   Row 2 (Adjacent Row)
Ear Count 31 A   Ear Count 30 A
  Rows Length     Rows Length
Ear 1 14 33   Ear 1 12 36
Ear 2 14 29   Ear 2 14 30
Ear 3 14 34   Ear 3 16 26
Ear 4 16 31   Ear 4 14 34
Ear 5 14 33   Ear 5 12 35
             
Average Kernels/Ear 460 B   Average Kernels/Ear 433 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 178     Yield (15.5%) 162  

Stop 29. This field did show some growth regulator herbicide damage. This area was a Moody silty clay loam 6-11% eroded soil.

Stop 29: 47 bu/ac soybeans, rainfed, no-till after corn, 15-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
29 15 120 427 2.4 18 47

Stop 30. This field had the most amount of Frogeye leaf spot on the tour.

Stop 30: 50 bu/ac soybeans, rainfed, no-till after corn, 15-inch rows.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
30 15 80 436 2.5 18 50

 

Region 6: Elkhorn River Valley

Stop 31. A good looking field in the Elkhorn River Bottom on Zook silt loam soil.

Stop 31: 183 bu/ac corn, rainfed, conventional-tilled after soybeans at 2/3 milk line.

Row 1   Row 2 (Adjacent Row)
Ear Count 24 A   Ear Count 28 A
  Rows Length     Rows Length
Ear 1 16 34   Ear 1 16 36
Ear 2 16 37   Ear 2 18 27
Ear 3 16 38   Ear 3 16 37
Ear 4 16 40   Ear 4 14 36
Ear 5 16 30   Ear 5 16 38
             
Average Kernels/Ear 573 B   Average Kernels/Ear 553 B
Kernel Weight Factor 80 C   Kernel Weight Factor 80 C
Yield (15.5%) 172     Yield (15.5%) 194  

Stop 32. Highest ear count during the tour at 34.5k/acre. Some tip-back that occurred after pollination during the blister stage on most ears. However, great yields expected on the Janude loam soil under irrigation.

Stop 32: 237 bu/ac corn, irrigated, conventional-tilled after soybeans at 1/2 milk line.

Row 1 – Stop 32   Row 2 (Adjacent Row)
Ear Count 35 A   Ear Count 34 A
  Rows Length     Rows Length
Ear 1 20 29   Ear 1 16 36
Ear 2 16 27   Ear 2 18 35
Ear 3 20 26   Ear 3 18 28
Ear 4 16 35   Ear 4 16 28
Ear 5 16 30   Ear 5 18 24
             
Average Kernels/Ear 514 B   Average Kernels/Ear 518 B
Kernel Weight Factor 75 C   Kernel Weight Factor 75 C
Yield (15.5%) 240     Yield (15.5%) 235  

Stop 33. Lodging was a significant in this field, some areas were only 12 inches tall on this Gibbon loam soil.

Stop 33: 49 bu/ac soybeans, rainfed, no-till after corn.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
33 30 140 403 2.6 17 49

No picture for stop 34, however low plant population in this area of the field on Zook silt loam soils.

Stop 34: 39 bu/ac soybeans, irrigated, conventional-till after corn.

Stop Row Spacing (inches) Plant Population (k/ac) Pods per 1/10,000 Acre Seeds per Pod Seed Size Factor Final (bu/ac)
34 15 40 361 2.6 18 39

Thanks for reading the entire report. Leave a comment below if you scrolled through this entire report for me!

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3 thoughts on “2017 Dodge County Crop Tech Cafe Yield Tour”

  1. Ron Schultz says:
    September 11, 2017 at 10:19 am

    Great report Nathan. Thanks for the intense work.

  2. quanxiang says:
    September 18, 2017 at 7:34 pm

    Everything is carefully, well done. thank you

  3. Larry Flamme says:
    September 19, 2017 at 11:19 am

    Excellent work . Great info