2015 Dodge County Crop Yield Tour

2015 Dodge County Crop Yield Tour: September 1-4

by Nathan Mueller

Note: Summary tables provided at the end of the blog post.

2015 Dodge County Crop Yield Tour Map

2015 Dodge County Crop Yield Tour Map

Corn Yield Estimation Method:

  1. Stop at random fields along a predetermined driving route through Dodge County (Map).
  2. Walk past all end rows and then walk 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 (likely).
  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 years * 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)

Soybean Yield Estimation Method:

  1. Stop at random fields along a predetermined driving route through Dodge County (Map).
  2. Walk past all end rows and then walk 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 (total number of plants doesn’t matter, unless fewer than 8 plants).
  6. Count the number of seeds per pod in all pods on two random 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 a harvest loss (5%) and moisture loss (harvested at 10% moisture) factor. (Note: Yield estimates are from a small area within the field, not the entire field). The final table at the bottom of the post includes another adjustment factor to predict the county average.

 

Region 1: Platte River Valley

2015 Platte River Valley Yield Tour

2015 Platte River Valley Yield Tour

Stop 1: Corn, irrigated, conventional till after corn 30-inch rows, R5 – 50% milkline

= 230 bu/ac

Row 1 Row 2
Ear Count 33 Ear Count 34
Rows Length Rows Length
Ear 1 16 35 Ear 1 12 40
Ear 2 12 36 Ear 2 16 33
Ear 3 18 30 Ear 3 16 36
Ear 4 20 26 Ear 4 16 36
Ear 5 16 26 Ear 5 16 33
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 217 Yield (15.5%) 244
Stop 1

Stop 1: 230 bu/ac irrigate corn in the Platte River Valley near Fremont.

Stop 2: Soybeans, dryland, conventional till after corn, 20-inch rows, R5.5

= 39 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
24 28 2 2 2
14 23 2 2 2
21 16 3 2 3
30 26 2 3 3
17 7 2 3
23 17 2 2
17 17 3 2
10 19 2 1
9 20 2 2
2 3
3 2
2 2
Total 338 Average 2.3
Stop 2

Stop 2: 39 bu/ac dryland soybeans planted late in Platte River Valley near Fremont

Stop 3: Soybeans, irrigated, conventional till after corn, 30-inch rows, R5.5

= 61 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
48 33 3 2 2 3 3
35 14 3 3 3 2 3
36 34 2 3 3 3 3
17 27 2 3 3 3 3
8 28 3 3 3 3 3
18 41 3 3 3 3 2
15 50 3 3 1 3 3
40 3 3 1 3 3
3 3 3 3 2
3 3 3 3 3
3 3 2 3
2 1 2 2
Total 444 Average 2.7
Stop 3

Stop 3: 61 bu/ac irrigated soybeans in Platte River Valley along Co Rd R.

Stop 4: Corn, dryland, conventional till, 30-inch rows, R4 – Late Dough

= 185 bu/ac

Row 1 Row 2
Ear Count 26 Ear Count 28
Rows Length Rows Length
Ear 1 14 36 Ear 1 12 36
Ear 2 12 35 Ear 2 14 33
Ear 3 16 35 Ear 3 16 36
Ear 4 14 36 Ear 4 16 36
Ear 5 16 35 Ear 5 14 39
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 177 Yield (15.5%) 194
Stop 4

Stop 4: 185 bu/ac dryland corn planted later in the Platte River Valley along Co Rd R.

Stop 5: Soybean, irrigated, no-till after corn, 30-inch rows, R6.

= 75 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
55 50 3 2 3 2 3 3 2 3 2
36 68 3 2 3 3 3 2 2 2
40 36 3 3 2 3 3 2 2 3
46 71 2 3 3 3 2 2 2 3
48 28 2 3 3 2 3 2 1 3
37 58 3 3 3 2 3 3 3 3
2 3 3 2 3 2 3 2
2 3 3 2 2 2 3 3
3 2 3 3 2 2 3 3
2 2 2 3 2 3 3 3
2 2 2 3 3 3 2 3
3 3 2 3 3 3 3 3
Total 573 Average 2.6
Stop 5

Stop 5: 75 bu/ac irrigated soybeans in Platte River Valley along Co Rd R.

Stop 6: Corn, flood irrigated, conventional till, 30-inch rows, R5 -1/3 milkline

=234 bu/ac

Row 1 Row 2
Ear Count 30 Ear Count 30
Rows Length Rows Length
Ear 1 18 35 Ear 1 18 37
Ear 2 16 37 Ear 2 16 35
Ear 3 14 38 Ear 3 16 35
Ear 4 16 33 Ear 4 18 35
Ear 5 16 36 Ear 5 16 36
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 229 Yield (15.5%) 239
Stop 6:

Stop 6: 234 bu/ac flood irrigated corn in the Platte River Valley near North Bend.

Region 2: Central Upland Flats South of Hooper and Scribner

2015 Central Upland Flats Yield Tour

2015 Central Upland Flats Yield Tour

Stop 7: Corn, irrigated, 30-inch rows, R5 -1/4 milkline

=256 bu/ac

Row 1 Row 2
Ear Count 35 Ear Count 32
Rows Length Rows Length
Ear 1 16 31 Ear 1 18 35
Ear 2 18 34 Ear 2 16 35
Ear 3 16 35 Ear 3 18 37
Ear 4 16 36 Ear 4 16 37
Ear 5 16 33 Ear 5 16 33
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 259 Yield (15.5%) 254
Stop 7:

Stop 7: 256 bu/ac irrigated corn south of  Hooper along the Webster Road.

Stop 8: Corn, dryland, conventional till, after soybeans, 30-inch rows, R5 -1/3 milkline.

=201 bu/ac

Row 1 Row 2
Ear Count 25 Ear Count 23
Rows Length Rows Length
Ear 1 18 35 Ear 1 18 36
Ear 2 16 34 Ear 2 18 34
Ear 3 18 33 Ear 3 18 38
Ear 4 16 37 Ear 4 16 42
Ear 5 16 39 Ear 5 18 39
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 199 Yield (15.5%) 204
Stop 8

Stop 8: 201 bu/ac dryland corn southwest of Hooper on the Webster Road.

Stop 9: Soybeans, irrigated, no-till, after corn, 30-inch rows, R6.

=73 bu/a

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
39 33 3 2 1 3 2 3 2
55 30 2 2 2 3 2 3 2
47 2 3 1 3 3 2 3
44 3 3 3 2 3 2 3
44 3 3 3 2 3 2 3
22 3 3 1 2 3 3 2
38 2 1 3 2 3 2
39 1 3 2 2 3 2
45 2 3 3 3 3 3
31 3 2 3 3 3 3
46 3 3 3 3 3 3
45 3 3 3 3 3 3
Total 558 Average 2.6
IMG_2492

Stop 9: 73 bu/ac irrigated soybeans along the Webster Road.

Stop 10: Soybeans, dryland, no-till after corn, 15-inch rows, R5.5

=97 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
50 27 3 3 3 3 3 2 3
44 34 3 3 3 3 3 4 3
2 0 3 3 4 3 3 4 2
8 18 3 4 3 3 3 3 3
46 52 3 3 3 3 3 3 3
45 29 3 3 2 3 3 3
43 16 3 3 3 3 3 3
56 16 3 3 3 3 3 3
53 6 3 3 4 3 3 3
26 23 2 3 4 3 3 3
16 3 4 3 1 3 3
17 3 3 3 3 4 3
Total 627 Average 3.0
Stop 10:

Stop 10: 97 bu/ac dryland soybeans southwest of Hooper that are 55 inches tall.

Stop 11: Soybeans, dryland, no-till, 15-inch rows, R6

=92 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
4 44 3 3 3 3 2 3 3 3
34 57 2 3 2 4 2 3 3
52 47 2 3 3 1 2 3 4
31 49 2 3 3 2 2 2 3
32 57 3 3 3 2 3 1 3
23 3 3 2 3 3 3 2
42 2 3 3 3 4 3 2
40 2 3 3 4 3 3 3
36 3 3 3 3 3 1 3
42 3 4 1 2 3 3 3
38 3 3 3 3 3 3 2
34 3 3 3 1 3 3 2
Total 662 Average 2.7

Stop 12: Corn, irrigated, 30-inch rows, R5 – 1/4 milkline

=227 bu/ac

Row 1 Row 2
Ear Count 32 Ear Count 33
Rows Length Rows Length
Ear 1 16 38 Ear 1 16 37
Ear 2 16 36 Ear 2 16 30
Ear 3 16 38 Ear 3 16 28
Ear 4 14 36 Ear 4 16 31
Ear 5 16 22 Ear 5 16 36
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 226 Yield (15.5%) 228
Stop 12:

Stop 12: 227 bu/ac irrigated corn had foliar diseases cause loss of green leaf area above  the ear.

Stop 13: Soybeans, irrigated, no-till, 15-inch rows, R6

=75 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants in the sample
40 43 2 3 2 2 3 2 3 3
65 23 2 3 3 3 3 3 3 2
57 2 3 2 3 3 2 3 3 3
8 49 3 3 3 3 3 2 3 3
41 28 2 3 3 2 3 2 2 3
36 12 2 3 3 3 3 2 2
28 3 3 3 3 3 3 3
3 3 3 1 2 3 3 3
20 3 3 1 3 3 3 3
33 3 3 3 3 3 3 3
16 3 2 3 3 3 3 4
34 3 2 1 3 3 3 3
Total 538 Average 2.7
Stop 13:

Stop 13: 75 bu/ac irrigate soybeans along the Webster Road.

Stop 14: Corn, dryland, no-till, after soybeans, 30-inch rows, R5 – early dent

=205 bu/ac

Row 1 Row 2
Ear Count 22 Ear Count 23
Rows Length Rows Length
Ear 1 20 34 Ear 1 18 40
Ear 2 18 39 Ear 2 18 37
Ear 3 18 39 Ear 3 18 40
Ear 4 20 34 Ear 4 18 37
Ear 5 16 34 Ear 5 20 38
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 194 Yield (15.5%) 217
Stop 14:

Stop 14: 205 bu/ac dryland corn southwest of Scribner along the Webster Road.


Region 3: Northwest Rolling Hills south of Snyder and Dodge

Northwest Rolling Hills Crop Yield Tour

Northwest Rolling Hills Crop Yield Tour

Stop 17: Corn, rainfed, conventional, after soybeans, 30-inch rows, R5 – 50% milkline in the Pebble Creek Bottom

=183 bu/ac

Row 1 Row 2
Ear Count 25 Ear Count 25
Rows Length Rows Length
Ear 1 16 36 Ear 1 14 35
Ear 2 16 38 Ear 2 16 32
Ear 3 16 35 Ear 3 14 36
Ear 4 12 41 Ear 4 14 36
Ear 5 16 34 Ear 5 20 35
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 185 Yield (15.5%) 181
Stop 17

Stop 17: 183 bu/ac dryland corn in the Pebble Creek bottom.

Stop 18: Soybeans, dryland, conventional after corn, 30-inch rows, R6 – full seed

=67 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
25 34 2 3 3 3 2 2 2
13 21 3 3 3 2 3 2 3
20 14 2 3 1 2 2 2 3
50 18 2 2 1 2 2 3 3
29 23 3 2 3 2 3 3 3
19 29 2 3 2 3 3 3 3
45 3 3 3 2 3 3
37 3 3 2 3 3 3
37 3 3 2 1 3 2
16 2 2 3 3 3 3
36 3 3 3 3 3 2
40 2 3 3 3 3 3
Total 506 Average 2.6
Stop 18:

Stop 18: 67 bu/ac dryland soybeans on southeast of Snyder.

Stop 19: Corn, rainfed, no-till after soybeans, 30-inch rows, R5 – 50% milkline.

=188 bu/ac

Row 1 Row 2
Ear Count 26 Ear Count 29
Rows Length Rows Length
Ear 1 16 32 Ear 1 18 31
Ear 2 14 34 Ear 2 14 35
Ear 3 18 32 Ear 3 16 33
Ear 4 18 32 Ear 4 14 32
Ear 5 16 32 Ear 5 14 33
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 184 Yield (15.5%) 192
Stop 19:

Stop 19: 188 bu/ac dryland corn on hillside in South of Snyder.

Stop 20: Soybeans, rainfed, no-till after corn, 26-inch rows, R6 – Full Seed.

=57 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
31 36 3 3 3 3
32 26 3 3 3 3
24 35 3 3 3 3
12 20 3 3 1 3
20 17 4 2 4 4
20 34 3 3 3 4
26 37 4 2 2 3
3 3 3 3
4 3 2 3
2 3 4
3 3 3
3 3 3
Total 370 Average 3.0
Stop 20:

Stop 20: 57 bu/ac dryland soybeans near Snyder.

Stop 21: Corn, irrigated, no-till, after soybeans, 30-inch rows, R5 – 50% milkline.

=180 bu/ac

Row 1 Row 2
Ear Count 32 Ear Count 32
Rows Length Rows Length
Ear 1 16 32 Ear 1 16 24
Ear 2 16 22 Ear 2 16 27
Ear 3 16 28 Ear 3 14 32
Ear 4 16 26 Ear 4 16 21
Ear 5 16 28 Ear 5 16 27
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 186 Yield (15.5%) 173
Stop 21a

Stop 21: 180 bu/ac irrigated corn with hail damage south of Dodge.

Stop 22: Soybeans, irrigated, no-till after corn, 30-inch rows, R6 – Full Seed.

=57 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
24 36 3 3 3 3 3
35 29 3 3 2 2 2
31 48 3 3 2 3 3
20 33 3 3 3 3 3
37 30 3 2 2 2 3
27 29 2 3 3 2 3
30 3 3 3 3 3
3 3 3 3
3 2 3 3
3 3 3 3
3 3 1 1
3 3 3 3
Total 409 Average 2.7
Stop 22: 57 bu/ac irrigated soybeans south of Dodge.

Stop 22: 57 bu/ac irrigated soybeans south of Dodge.

 

Region 4: Sandhills north of Scribner

2015 Sandhills Crop Yield Tour

2015 Sandhills Crop Yield Tour

Stop 24: Corn, irrigated, no-till after soybeans, 30-inch rows, R5 – 33% milkline.

=181 bu/ac

Row 1 Row 2
Ear Count 28 Ear Count 29
Rows Length Rows Length
Ear 1 14 36 Ear 1 14 36
Ear 2 14 36 Ear 2 16 33
Ear 3 16 34 Ear 3 16 31
Ear 4 16 26 Ear 4 16 23
Ear 5 14 34 Ear 5 12 36
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 182 Yield (15.5%) 180
Stop 24: 181 bu/ac irrigated corn on sandy soils north of Scribner.

Stop 24: 181 bu/ac irrigated corn on very sandy soils north of Scribner.

Stop 25: Soybeans, dryland, no-till after corn, 7.5-inch rows, R6 – Full Seed.

=87 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
37 28 2 3 2 3 1
35 36 3 2 2 2 2 2
45 20 3 2 3 3 2 2
26 27 1 2 2 2 2 2
32 30 3 3 3 3 3 3
32 41 3 3 2 3 3 3
30 27 2 2 3 3 2 3
18 28 2 3 3 3 2 3
28 8 3 1 3 2 2
29 32 1 3 2 3 2
33 53 3 2 4 3 3
17
Total 692 Average 2.5
Stop 25:

Stop 25: 87 bu/ac dryland drilled (7.5 – inches)  soybeans on sandy soils north of Scribner.

Stop 26: Soybeans, irrigated, no-till, after corn, 30-inch rows, R6 – Full Seed.

=58 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
36 20 2 2 2 4 2
30 27 2 2 3 3 3
32 25 3 3 2 3 2
18 30 3 3 2 3 3
28 30 2 3 3 3 2
29 26 2 3 3 3 2
38 28 3 3 3 3 3
30 2 3 3 3 2
3 2 2 3 2
3 3 3 2 3
3 3 3 2
Total 427 Average 2.6
Stop 26:

Stop 26: 58 bu/ac irrigated soybeans on sandy soils northeast of Scribner.

Stop 27: Corn, dryland, no-till after soybeans, 30-inch rows, R5 – 33% milkline.

=170 bu/ac

Row 1 Row 2
Ear Count 25 Ear Count 25
Rows Length Rows Length
Ear 1 14 40 Ear 1 16 37
Ear 2 16 31 Ear 2 16 35
Ear 3 14 37 Ear 3 16 34
Ear 4 12 39 Ear 4 16 36
Ear 5 14 35 Ear 5 16 39
Kernel Weight (1,000) 80 Kernel Weight (1,000) 80
Yield (15.5%) 158 Yield (15.5%) 181
Stop 27:

Stop 27: 170 bu/ac dryland corn on sandy soil northeast of Scribner.

 

Region 5: Northeast Rolling Hills near Uehling

2015 Northeast Rolling Hills Crop Tour

2015 Northeast Rolling Hills Crop Tour

Stop 28: Soybeans, dryland, conventional no-till after corn, 30-inch rows, R6 – Full Seed.

=70 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
45 54 3 3 3 3 2 3 3 4 1
44 37 3 2 3 3 3 3 3 3 3
65 30 3 3 3 2 3 3 2 1 3
41 37 3 3 3 3 3 3 3 2 3
56 51 2 2 3 4 2 2 3 3 3
56 2 2 2 2 3 2 3 3
3 3 3 3 3 3 3 3
2 3 2 3 2 2 2 4
1 2 1 3 3 3 3 4
2 3 3 3 3 2 3 2
3 3 3 2 3 2 3 2
Total 516 Average 2.7
Stop 28:

Stop 28: 70 bu/ac soybeans west of Uehling.

Stop 29: Corn, dryland, conventional till after soybeans, 30-inch rows, R5 – 50% milkline.

=221 bu/ac

Row 1 Row 2
Ear Count 29 Ear Count 27
Rows Length Rows Length
Ear 1 14 35 Ear 1 16 39
Ear 2 16 40 Ear 2 16 38
Ear 3 18 37 Ear 3 16 37
Ear 4 14 37 Ear 4 16 37
Ear 5 18 33 Ear 5 16 37
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 225 Yield (15.5%) 217
Stop 29:

Stop 29: 221 bu/ac dryland corn west of Uehling, which was the highest dryland yield estimate on the tour.

Stop 30: Soybeans, dryland, no-till after soybeans, 30-inch rows, R6 – Full Seed.

=59 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
32 36 3 3 2 2 2 2 3
33 30 1 3 3 2 3 3 3
29 22 2 3 2 3 3 3 3
26 35 2 2 3 3 3 2 3
27 42 2 3 3 2 2 3
22 35 2 2 3 2 2 3
32 26 2 2 2 3 3 3
36 2 2 2 3 2 3
2 3 3 2 3 1
2 3 3 2 3 3
2 3 2 2 3 3
Total 463 Average 2.5
Stop 30: 59 bu/ac dryland soybeans southeast of Uehling.

Stop 30: 59 bu/ac dryland soybeans southeast of Uehling.

Stop 31: Corn, dryland, no-till after soybeans, 30-inch rows, R5 – 50% milkline.

=176 bu/ac

Row 1 Row 2
Ear Count 25 Ear Count 27
Rows Length Rows Length
Ear 1 16 36 Ear 1 12 38
Ear 2 14 34 Ear 2 14 40
Ear 3 12 38 Ear 3 14 36
Ear 4 14 31 Ear 4 14 39
Ear 5 14 36 Ear 5 16 35
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 163 Yield (15.5%) 189
Stop 31:

Stop 31: 176 bu/ac dryland corn southeast of Uehling.

Stop 32: Soybeans, dryland, no-till after soybeans, 15-inch rows, R6 – Full Seed.

=77 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
18 46 3 3 3 3 3 3 3
58 25 3 3 3 3 2 3 3
29 11 3 3 3 3 3 3 4
20 19 3 3 3 3 3 2
28 28 3 3 4 2 3 3
30 27 3 3 3 3 2 3
30 41 3 3 3 3 3 3
36 34 2 3 2 2 3 3
15 36 3 3 3 3 3 2
2 3 4 3 2 3
3 2 3 1 3 2
3 2 3 2 3 3
Total 531 Average 2.8
Stop 32:

Stop 32: 77 bu/ac dryland soybeans southeast of Uehling lodged, but full of pods

Stop 33: Corn, dryland, no-till after soybeans, 30-inch rows, R5 – 33% milkline.

=184 bu/ac

Row 1 Row 2
Ear Count 25 Ear Count 25
Rows Length Rows Length
Ear 1 16 37 Ear 1 16 40
Ear 2 12 44 Ear 2 14 41
Ear 3 16 39 Ear 3 14 42
Ear 4 14 41 Ear 4 16 36
Ear 5 14 26 Ear 5 14 32
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 179 Yield (15.5%) 188
Stop 33:

Stop 33: 184 bu/ac dryland no-till corn west of Winslow.

 

Region 6: Elkhorn River Valley

2015 Elkhorn River Valley Crop Yield Tour

2015 Elkhorn River Valley Crop Yield Tour

Stop 15: Soybeans, dryland, conventional till after corn, 22-inch rows, R6 – Full Seed.

=76 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
54 27 1 2 3 3 3 2 3
44 35 3 2 2 3 3 2 3
19 32 3 3 3 3 3 3 3
64 2 3 2 2 3 2 2
65 2 2 3 2 2 2
33 3 1 2 2 3 3
33 3 2 1 3 3 3
55 3 2 2 3 3 2
38 3 3 3 2 3 3
39 3 1 3 3 3 3
26 3 2 3 2 3 3
31 2 2 2 2 2 3
Total 595 Average 2.5
Stop 15:

Stop 15: 76 bu/ac soybeans near Scribner with soybean aphids like many other fields see during the tour.

Stop 16: Corn, irrigated, conventional till after soybeans, 30-inch rows, R5 – 75% milkline.

=158 bu/ac

Row 1 Row 2
Ear Count 27 Ear Count 27
Rows Length Rows Length
Ear 1 20 20 Ear 1 16 33
Ear 2 16 34 Ear 2 16 30
Ear 3 16 26 Ear 3 16 16
Ear 4 16 27 Ear 4 16 31
Ear 5 18 31 Ear 5 14 20
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 169 Yield (15.5%) 147
Stop 16:

Stop 16: 158 bu/ac irrigated corn on poorly drained soil near Scribner.

Stop 23: Soybeans, dryland, conventional till after corn, 30-inch rows, R6 – Full Seed.

=47 bu/ac

Pods per 1/10,000 Acres Seeds per pod from two random plants
19 23 1 2 2 2 3 3
22 39 2 3 2 3 2 3
18 29 3 3 3 3 3 3
21 31 3 1 2 2 3 3
27 16 3 2 3 3 3 2
28 26 3 3 2 3 3 3
17 26 2 2 3 3 3 3
21 3 3 3 3 1 2
3 2 3 3 1 3
2 2 2 3 2
3 3 2 3 2
Total 363 Average 2.5
Stop 23:

Stop 23: 47 bu/ac dryland soybean northwest of Scribner.

Stop 34: Corn, dryland, conventional till after soybeans, 30-inch rows, R5 – 50% milkline.

=168 bu/ac

Row 1 Row 2
Ear Count 26 Ear Count 25
Rows Length Rows Length
Ear 1 16 33 Ear 1 16 31
Ear 2 14 31 Ear 2 14 35
Ear 3 16 26 Ear 3 16 34
Ear 4 14 35 Ear 4 16 36
Ear 5 14 34 Ear 5 14 36
Kernel Weight (1,000) 75 Kernel Weight (1,000) 75
Yield (15.5%) 163 Yield (15.5%) 174
Stop 34: 168 bu/ac dryland corn on well-drained soils.

Stop 34: 168 bu/ac dryland corn on well-drained soils southeast of Winslow.

Dodge County: Summary for the 6 regions

Dodge County Corn Yield Summary Tables:

Stop Region Irrigated Ave. ears per 1/1,000 Acre Ave. Rows of Kernels Ave. Row Length (Kernels) Yield
1 Platte Valley Yes 33.5 15.8 33.1 230
4 Platte Valley No 27 14.4 35.7 185
6 Platte Valley Yes 30 16.4 35.7 234
7 Central Flats Yes 33.5 16.6 34.6 256
8 Central Flats No 24 17.2 36.7 201
12 Central Flats Yes 32.5 15.8 33.2 227
14 Central Flats No 22.5 18.4 37.2 205
17 NW Hills (Pebble) No 25 15.4 35.8 183
19 NW Hills No 27.5 15.8 32.6 188
21 NW Hills Yes 32 15.8 26.7 180
24 Sandhills Yes 28.5 14.8 32.5 181
27 Sandhills No 25 15 36.3 170
29 NE Hills No 28 16 37 221
31 NE Hills No 26 14 36.3 176
33 NE Hills No 25 14.6 37.8 184
16 Elkhorn Valley Yes 27 16.4 26.8 158
34 Elkhorn Valley No 25.5 15 33.1 168
Stop Region Irrigated Ave. ears per 1/1,000 Acre Ave. Rows of Kernels Ave. Row Length (Kernels) Yield
4 Platte Valley No 27 14.4 35.7 185
8 Central Flats No 24 17.2 36.7 201
14 Central Flats No 22.5 18.4 37.2 205
17 NW Hills (Pebble) No 25 15.4 35.8 183
19 NW Hills No 27.5 15.8 32.6 188
27 Sandhills No 25 15 36.3 170
29 NE Hills No 28 16 37 221
31 NE Hills No 26 14 36.3 176
33 NE Hills No 25 14.6 37.8 184
34 Elkhorn Valley No 25.5 15 33.1 168
Dryland Average 25.6 15.6 35.9 188
1 Platte Valley Yes 33.5 15.8 33.1 230
6 Platte Valley Yes 30 16.4 35.7 234
7 Central Flats Yes 33.5 16.6 34.6 256
12 Central Flats Yes 32.5 15.8 33.2 227
21 NW Hills Yes 32 15.8 26.7 180
24 Sandhills Yes 28.5 14.8 32.5 181
16 Elkhorn Valley Yes 27 16.4 26.8 158
Irrigated Average 31.7 15.9 32.6 218

Dodge County Corn Comments: Disease pressure had been high in some fields and a decent amount of green leaf area above the ear leaf was lost in several fields. Disease causing leaf are loss included gray leaf spot, northern corn leaf blight and southern rust.  Ear counts on some dryland fields were lower than I expected given my plant populations (25-30K, average of 28K) taken during my June crop tour. The highest yielding dryland field also had the most ears per acre.

Dodge County Soybean Summary Tables:

Stop Region Irrigated Row Spacing Pods per 1/10,000 Acre Seeds per Pod Yield
2 Platte Valley No 20 338 2.3 39
3 Platte Valley Yes 30 444 2.7 61
5 Platte Valley Yes 30 573 2.6 75
9 Central Flats Yes 30 558 2.6 73
10 Central Flats No 15 627 3.0 97
11 Central Flats No 15 662 2.7 92
13 Central Flats Yes 15 538 2.7 75
18 NW Hills No 30 506 2.6 67
20 NW Hills No 26 370 3.0 57
22 NW Hills Yes 30 409 2.7 57
25 Sandhills No 7.5 692 2.5 87
26 Sandhills Yes 30 427 2.6 58
28 NE Hills No 30 516 2.7 70
30 NE Hills No 30 463 2.5 59
32 NE Hills No 15 531 2.8 77
15 Elkhorn Valley No 22 595 2.5 76
23 Elkhorn Valley No 30 363 2.5 47

 

Adjusted Yields to Estimate the 2015 Dodge County Average

Stop Region Irrigated Row Spacing Pods per 1/10,000 Acre Seeds per Pod Adjusted Yield
2 Platte Valley No 20 338 2.3 33
10 Central Flats No 15 627 3.0 81
11 Central Flats No 15 662 2.7 77
18 NW Hills No 30 506 2.6 56
20 NW Hills No 26 370 3.0 47
25 Sandhills No 7.5 692 2.5 73
28 NE Hills No 30 516 2.7 59
30 NE Hills No 30 463 2.5 50
32 NE Hills No 15 531 2.8 64
15 Elkhorn Valley No 22 595 2.5 64
23 Elkhorn Valley No 30 363 2.5 40
Dryland Average 21 523 2.7 60
3 Platte Valley Yes 30 444 2.7 51
5 Platte Valley Yes 30 573 2.6 63
9 Central Flats Yes 30 558 2.6 61
13 Central Flats Yes 15 538 2.7 63
22 NW Hills Yes 30 409 2.7 48
26 Sandhills Yes 30 427 2.6 48
Irrigated Average 28 492 2.7 56

Dodge County Soybean Comments:
Soybean aphids were present in about half the fields along with some pockets of white mold and sudden death syndrome within fields. Lodging was an issue in some fields, more commonly in narrow-row planted soybeans. Pre-harvest soybean yield estimates tend to over estimate yield. My best guess after accounting for harvest loss (5%) and a harvest moisture of 10%, that another 16% adjustment down is needed to get a final yield estimate for the Dodge County average. Therefore, my estimated Dodge County average is about 58 bu/ac for irrigated and dryland acres this year in Dodge County. Since this is the first yield tour like this, I will continue to make adjustments to arrive at a better soybean yield estimate.

Nathan Mueller, Cropping Systems Extension Educator
*protected email*
402.727-2775

2015 Dodge County Crop Yield Tour
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  1. […] First, how close was my preharvest yield estimates last year during this tour?  USDA-NASS 2015 Dodge County yields based on post-harvest farmer surveys was 194.8 bu/ac for all corn acres and 60.3 bu/ac for all soybean acres. My 2015 preharvest yield estimates for all corn acres was 197 bu/ac and for all soybean acres was 58 bu/ac. Check out last years crop tour yield tour: 2015 Dodge County Crop Yield Tour. […]

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