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1997 Bootheel Irrigation Survey

Prepared by Joe Henggeler, Extension Agricultural Engineer
Commercial Agricultural Program


Average irrigated acreage of those surveyed in 1997: 753 acres
Average acreage planned for irrigation in 1998: 881 acres

I. Systems Used

(by # reported) Power Source (by acreage used on)
Furrow, rigid pipe 3% (down 81%) LP Gas 27% (down 7%)
Furrow, poly-pipe 36% (up 9%) Diesel 24% (up 24%)
Center pivot, fixed 41% (up 21%) Electric 26% (up 189%)
Center pivot, towable 19% (up 19%)  

II. Costs

1) Fuel:

LP Gas $7.96/acre
Diesel $6.69/acre
Electric $8.75/acre

2) Maintenance and Repairs:

A) Wells $ 68.72/well $0.83/acre
B) Pumps $1.30/acre
    note: 83.2 acres/well site
C) System  
  a Fixed pivot $4.69/acre
  b towable pivot $1.14/acre
  c rigid pipe $0.00/acre
  d poly-pipe $1.14/acre
  Average all systems: $1.99/acre

3) Special study on land-leveling:

A) Cost for precision-leveling, initial job: $196/acre, $21.56/ac/yr
B) Cost for precision-leveling, touch up: $ 75/acre, $13.20/ac/yr
C) Time interval between touch-ups: 8.3 years

III. Amount of Land-Forming Done by Irrigation Land Class

  Pivot Land Flood-Irrigated Land Dryland
Laser-leveled 23% 73% 5%
Land-planed 32% 20% 39%
No dirt Work 45% 8% 56%

--- Crowns that have been precision-graded: 64%

1997 Bootheel Irrigation Results
  CORN COTTON SC SOY DC SOY MILO
Number Reported 61 46 18 13 1
Acres Reported 6677 5540 1964 1355 114
# of Irrigations, furrow 7.2 2.8 2.5 --- ---
# of Irrigation, pivot 6.6 4.6 2.8 4.8 6
Irrigated Yield 155 bu 865 lbs 41 bu 42 bu 110 bu
Dryland Yield 103 bu 723 lbs 28 bu 31 bu 70 bu  
Increase over Dryland 52 bu 142 lbs 13 bu 11 bu 40 bu

1987-1997 Bootheel Irrigation Survey
Year Irrig.
Corn
(bu)
Non-Irrig.
Corn
(bu)
Irrig.
Soybeans
(bu)
Non-Irrig.
Soybeans
(bu)
Irrig.
DC
Soybeans
(bu)
Non-Irrig.
DC
Soybeans
(bu)
Irrig.
Cotton
(lbs)
Non-Irrig.
Cotton
(lbs)
Irrig.
Milo
(bu)
Non-Irrig.
Milo
(bu)
1987 149 121 44 32 33 19 --- --- 110 101
1988 148 88 39 32 36 27 877 718 108 91
1989 152 117 37 27 29 23 807 605 92 77
1990 146 86 44 29 38 31 768 528 82 32
1991 143 84 42 29 43 30 917 678 105 69
1992 189 135 48 37 44 32 1029 990 121 108
1993 137 95 44 31 41 30 722 546 113 75
1994 162 123 47 38 43 37 933 779 101 93
1995 156 124 43 29 42 31 637 422 90 66
1996 170 124 43 32 42 25 905 719 98 63
1997 155
($2.57)*
103
($3.02)*
41
($6.75)*
28
($7.92)*
42
(---)*
31
(---)*
865
($0.58)*
723
($0.59)*
110
($3.08)*
70
($3.84)*
Avg 155 109 43 32 39 29 846 670 103 77
* Break-even price; after D. Reinbott. 1998. Crop Budgets: Southeast Missouri. Un-numbered report. University of Missouri Outreach & Extension Service. Scott County.

Difference of Irrigated over Non-Irrigated:
Corn, 46 bu
Soybeans, 11 bu
Double-crop Soybeans, 10 bu
Cotton, 176 lbs
Milo, 25 bu

Yield Increase of All Soybeans to Irrigation
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able Pivot Furrow Irrigation
(Poly-pipe)
Average
Sand 13.75
n = 4
17.50
n = 2
--- 15.00
n = 6
Silt 10.50
n = 5
12.00
n = 3
14.25
n = 4
12.13
n = 12
Clay/Gumbo 6.50
n = 2
3.00
n = 1
11.00
n = 3
8.17
n = 6
Average 10.96
n = 11
12.33
n = 6
12.87
n = 7
11.86
n = 24

Irrigated Soybean Yield
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able Pivot Furrow Irrigation
(Poly-pipe)
Average
Sand 41.8
n = 5
42.5
n = 2
--- 42.00
n = 7
Silt 41.8
n = 5
46.0
n = 3
43.8
n = 4
43.52
n = 12
Clay/Gumbo 35.5
n = 2
38.0
n = 1
41.8
n = 5
39.75
n = 8
Average 40.75
n = 12
43.50
n = 6
42.69
n = 9
42.01 z
n = 25

Yield Increase of Corn Due to Irrigation
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able
Pivot
Rigid Pipe Poly-pipe Average
Sand 72.1
n = 18
35.0
n = 2
65.0
n = 2
60.0
n = 5
66.59
n = 27
Silt 52.5
n = 8
29.0
n = 1
20.0
n = 1
62.0
n = 4
51.21
n = 14
Clay/Gumbo --- --- --- 60.0
n = 1
60.00
n = 1
Average 66.07
n = 26
33.00
n = 3
50.00
n = 3
60.80
n = 10
61.31
n = 42

Irrigated Corn Yield
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able
Pivot
Rigid Pipe Poly-pipe Average
Sand 154.4
n = 2
140.0
n = 18
166.8
n = 4
157.5
n = 6
155.71
n = 20
Silt 166.1
n = 9
149.0
n = 1
120.0
n = 1
159.2
n = 11
159.78
n = 22
Clay/Gumbo --- --- 130.0
n = 1
143.3
n = 3
139.98
n = 4
Average 158.30
n = 27
143.00
n = 3
152.87
n = 6
156.31
n = 20
165.29
n = 46

Yield Increase of Cotton Due to Irrigation
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able
Pivot
Rigid Pipe Poly-pipe Average
Sand 165.0
n = 3
250.0
n = 7
--- 124.9
n = 11
172.33
n = 21
Silt 170.3
n = 4
250.0
n = 1
--- -75.0
n = 2
111.60
n = 7
Clay/Gumbo 0.0
n = 1
--- --- 0.0
n = 1
0.00
n = 2
Average 147.03
n = 8
250.00
n = 8
--- 87.40
n = 14
146.67
n = 30

Irrigated Cotton Yield
1997 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able
Pivot
Rigid Pipe Poly-pipe Average
Sand 857.9
n = 8
886.4
n = 7
819.5
n = 2
871.9
n = 14
869.20
n = 30
Silt 857.3
n = 4
900.0
n = 1
--- 903.5
n = 4
882.58
n = 9
Clay/Gumbo 980.0
n = 1
--- 900.0 n = 1 1000.0
n = 1
960.00
n = 3
Average 867.11
n = 13
888.34
n = 8
846.33
n = 3
885.30
n = 19
877.66
n = 43

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