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1998 Bootheel Irrigation Survey

Prepared by Joe Henggeler, Extension Agricultural Engineer
Commercial Agricultural Program


Average irrigated acreage of those surveyed in 1998: 1,149 acres
Average acreage planned for irrigation in 1999: 1,192 acres

I. Systems Used

(by acreage used on) Power Source
Furrow, rigid pipe 5% LP Gas 19% (- 28%)
Furrow, poly-pipe 25% Diesel 47% (- 2%)
Center pivot, fixed 50% Electric 34% (+ 30%)
Center pivot, towable 20%  

Table 1. - % of Irrigated Acreage by Fuel Type and Irrigation Method
Fuel Source Irrigation Method
  Fixed Pivot Towable Pivot Rigid Pipe Poly-Pipe
Diesel 28% 17% 2% 10%
Electric 22% 4% 0% 3%
LP 0% 0% 3% 11%

II. Irrigation Costs

1. Fuel:

LP Gas $7.18/acre
Diesel $7.67/acre
Electric $7.36/acre

2. Maintenance and Repairs:

A) Wells ($129.07/well) $1.40/acre
B) Pumps ($117.43/pump) $2.03/acre
    note: 89.5 acres/well site
11.8 wells per farmer
C) System (average all types) $2.21/acre
  TOTAL   $5.64/acre

3. Labor (average for all types of systems): 0.42 hrs/acre

4. Special study on land-leveling:

  Initial Cost   Annual Cost
A) Cost for precision-leveling, initial job: $198/acre -> $21.56/ac/yr*
B) Cost for precision-leveling, touch up: $ 69/acre -> $12.35/ac/yr**
C) Time interval between touch-ups: 8.1 years    
  * Interest = 9.0%; period = 20 years
** Interest = 9.0%; period = 8.1 years

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

Table 2. - The extent of land leveling practices by irrigation method in Southeast Missouri, 1998
  Pivot Land Flood-Irrigated Land Dryland
Laser-leveled 34% 76% 6%
Land-planed 23% 17% 27%
No dirt Work 42% 6% 62%

IV. Chemigation Being Used

Percentage of farmers who use chemigation: 18.2%
Percentage of irrigated land being chemigated: 7.9%

V. Farmers Using Various Technology

Percentage of respondents who have:

WWW access: 42%
FAX machines: 46%
WWW or FAX: 59%
Yield monitors: 27%
Yield monitors w/ GPS: 15%
Laser leveling equipment: 15%

Percentage of irrigated land that is:

Deep-ripped: 74% (91%, 65% & 53% for sand, silt & clay , respectively)
Limed: 64% (81%, 58% & 33% for sand, silt & clay , respectively)
Laser-leveled: 42% (33%, 34% & 42% for sand, silt & clay , respectively)

Table 3. - The Effect of Ripping, Liming, and Lasering on Irrigated Crop Yield in Southeast Missouri, 1998
  Ripped Not Ripped Limed Not Limed Lasered Not Lasered
CORN
Sand 143.2
n = 11
109.3
n = 3
136.2
n = 13
133.0
n = 1
154.0
n = 4
135.9
n = 10
Silt 156.5
n = 10
124.2
n = 5
149.3
n = 10
138.6
n = 5
146.8
n = 4
145.4
n = 11
Clay 140.0
n = 3
123.0
n = 2
140.0
n = 2
128.7
n = 3
118.7
n = 3
155.0
n = 2
All Soils 148.3
n = 24
119.5
n = 10
141.7
n = 25
134.7
n = 9
141.8
n = 11
142.1
n = 23
 
ALL SOYBEANS
Sand 43.2
n = 10
29.0
n = 3
39.6
n = 12
43.0
n = 1
43.0
n = 2
39.4
n = 11
Silt 32.3
n = 3
42.5
n = 2
44.5
n = 2
31.0
n = 3
41.0
n = 4
18.0
n = 1
Clay 38.4
n = 7
34.1
n = 7
43.2
n = 5
32.1
n = 12
42.5
n = 7
30.0
n = 7
All Soils 46.9
n = 17
34.2
n = 12
41.1
n = 19
32.6
n = 16
42.1
n = 13
34.8
n = 19
 
COTTON
Sand 685.2
n = 16
680.0
n = 1
720.5
n = 10
634.0
n = 7
724.5
n = 8
649.7
n = 9
Silt 694.3
n = 9
700.0
n = 2
616.7
n = 6
774.8
n = 6
588.5
n = 4
749.4
n = 8
Clay 875.0
n = 1
650.0
n = 1
--- 762.5
n = 2
762.5
n = 2
---
All Soils 695.7
n = 26
682.5
n = 4
681.6
n = 16
707.5
n = 15
691.1
n = 14
696.6
n = 17

Table 4. - 1998 Bootheel Irrigation Results
  CORN COTTON SC SOY DC SOY MILO
Number Reported 34 31 18 7 1
Acres Reported 3888 3667 2896 595 ---
# of Irrigations, furrow 4.8 2.7 3.3 1.0 ---
# of Irrigation, pivot 5.6 3.9 6.4 7.6 ---
Irrigated Yield 140 bu 692 lbs 37 bu 40 bu 82 bu
Dryland Yield 95 bu 542 lbs 22 bu 27 bu --- bu
Increase over Dryland 45 bu 150 lbs 15 bu 13 bu --- bu

Table 5. - 1987-1998 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 155 103 41 28 42 31 865 723 110 70
1998 140
($2.86)*
95
($3.31)*
37
($8.28)*
22
($10.04)*
40
($6.89)*
27
($8.15)*
692
($0.70)*
542
($0.75)*
82
($4.18)*
---
----
Avg 154 108 43 31 39 29 832 658 101 77
* Break-even price; after D. Reinbott. 1999. 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 -- 174 lbs
Milo -- 24 bu


Table 6. - Yield Increase of All Soybeans to Irrigation
1998 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 17.6
n = 6
17.5
n = 2
--- 0.5
n = 2
14.15
n = 10
Silt --- 17.0
n = 2
12.0
n = 2
20.0
n = 1
15.60
n = 5
Clay/Gumbo 15.4
n = 7
8.5
n = 2
15.0
n = 1
12.3
n = 3
13.61
n = 13
Average 16.43
n = 13
14.33
n = 6
13.00
n = 3
9.65
n = 6
14.16
n = 28

Table 7. - Irrigated All Soybeans Yield
1998 Bootheel Irrigation Survey
Showing # of irrigations & Average Depth Applied
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 42.1
(7.8 @ 0.6")
n = 9
38.5
(4.5 @ 0.8")
n = 2
--- 31.5
(1.0 @ 4.0")
n = 2
39.94
n = 13
Silt --- 31.5
(4.0 @ 1.0")
n = 2
39.5
(1.5 @ 2.0")
n = 2
40.0
(3.0 @ 1.5")
n = 1
36.40
n = 5
Clay/Gumbo 36.3
(3.4 @ 0.9")
n = 7
43.0
(18.0 @ 0.8")
n = 7
453.0
(4.0 @ 1.50")
n = 1
30.8
(4.0 @ 1.4")
n = 4
36.29
n = 4
Average 39.57
n = 16
37.6
n = 6
41.33
n = 3
32.30
n = 7
37.79
n = 32

Table 8. - Yield Increase of Corn Due to Irrigation
1998 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 18.0
n = 7
0.0
n = 1
--- 63.5
n = 4
31.67
n = 12
Silt 65.0
n = 5
81.0
n = 2
30.0
n = 1
56.0
n = 3
62.27
n = 11
Clay/Gumbo 25.0
n = 1
--- 40.0
n = 1
48.0
n = 1
37.67
n = 3
Average 36.62
n = 13
54.00
n = 3
35.00
n = 2
58.75
n = 8
45.31
n = 26

Table 9. - Irrigated Corn Yield
1998 Bootheel Irrigation Survey
Showing # of irrigations & Average Depth Applied
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 131.3
(7.6 @ 0.8")
n = 9
70.0
(10.0 @ 0.6")
n = 1
--- 162.7
(5.3 @ 1.3")
n = 4
135.80
n = 14
Silt 145.6
(5.0 @ 0.9")
n = 7
134.0
(4.5 @ 1.1")
n = 3
150.0
(3.0 @ ?)

n = 1
153.8
(3.4 @ 2.0")
n = 4
145.76
n = 15
Clay/Gumbo 170.0
(4.0 @ 0.8")
n = 1
--- 140.0
5.08 @ 1.5")
n = 1
118.7
(7.0 @ 4.0")
n = 3
133.22
n = 5
Average 139.47
n = 17
118.00
n = 4
145.00
n = 2
147.46
n = 11
139.85
n = 34

Table 10. - Yield Increase of Cotton Due to Irrigation
1998 Bootheel Irrigation Survey
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 135.6
n = 8
136.7
n = 3
--- 126.0
n = 3
133.78
n = 14
Silt 40.0
n = 1
100.0
n = 1
187.5
n = 2
239.0
n = 3
176.00
n = 7
Clay/Gumbo --- 200.0
n = 1
--- --- 200.00
n = 1
Average 124.98
n = 9
142.00
n = 5
187.50
n = 2
182.50
n = 6
150.22
n = 22

Table 11. - Irrigated Cotton Yield
1998 Bootheel Irrigation Survey
Showing # of irrigations & Average Depth Applied
Soil Type Fixed Pivot Tow-able Pivot Rigid Pipe Poly-pipe Average
Sand 677.5
(4.8 @ 0.9")
n = 8
736.7
(4.3 @ 1.0")
n = 3
--- 668.8
(3.5 @ 1.9")
n = 6
684.88
n = 17
Silt 716.7
(2.0 @ 0.8")
n = 3
600.0
(3.0 @ 0.8")
n = 1
750.0
(1.5 @ 2.0")
n = 2
683.0
(2.0 @ 2.7")
n = 6
695.68
n = 12
Clay/Gumbo --- 650.0
(2.0 @ 1.5")
n = 1
--- 875.0
(2.0 @ 2.0")
n = 1
762.50
n = 2
Average 688.18
n = 11
692.02
n = 6
750.00
n = 1
691.22
n = 13
692.19
n = 31

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