Dr. Jerald Bergman, Director, NDSU Williston Research Extension Center, Williston, North Dakota
Dr. Joyce Eckhoff, Agronomist, MSU Eastern Agricultural Research Center, Sidney, Montana
Dr. Charles Flynn, Chemist, MSU Eastern Agricultural Research Center, Sidney, Montana
Kerry Rasmussen, Agriculturalist, Sidney Sugars (American Crystal), Sidney, Montana
Previous crops were malt barley in 2002, potatoes in 2001, and durum in 2000. Residual soil N to 4 feet was 95 lb/ac (including OM) under the flood site and 121 lb/ac (including OM) under the sprinkler site. Residual soil P to 6 inches was 28 ppm under the flood site and 27 ppm under the sprinkler site. Residual soil K to 6 inches was 458 ppm under the flood site and 500 ppm under the sprinkler site. Five rates of liquid 28-0-0 were applied Oct 4, 2002. A check variety with no applied N was included.
|
SPRINKLER IRRIGATION |
FLOOD IRRIGATION |
||||||
|
N rate |
Soil N* |
Applied N |
Available N |
N rate |
Soil N* |
Applied N |
Available N |
|
Recommended – 20% |
121 |
47 |
168 |
Recommended – 20% |
95 |
73 |
168 |
|
Recommended – 10% |
121 |
68 |
189 |
Recommended – 10% |
95 |
94 |
189 |
|
Recommended |
121 |
89 |
210 |
Recommended |
95 |
115 |
210 |
|
Recommended + 10% |
121 |
110 |
231 |
Recommended + 10% |
95 |
136 |
231 |
|
Recommended + 20% |
121 |
131 |
252 |
Recommended + 20% |
95 |
157 |
252 |
|
No applied N |
121 |
0 |
121 |
No applied N |
95 |
0 |
95 |
*residual soil N to 4 feet + 65 lb N/ac attributed to OM
Plots were planted to stand with the variety AC927 on Apr 28 with a commercial six-row planter. Ro-Neet 6E (3.5 lb AI/ac) and Counter (1 lb AI/ac) were applied in 7” bands at planting. Betamix (1.5 pt/ac) was applied on May 30, Jun10 and Jun 16. Stinger (0.4 pt/ac) was applied Jun 2. Headline (9.2 oz/ac) was applied by ground rig on Jul 11. Sprinkler plots were irrigated on Jul 1, Jul 12, Jul 17, Jul 24, Jul 31, Aug 12, and Aug 26. Flood irrigated plots were irrigated on Jun 30, Jul 16, Jul 27, Aug 5, and Aug 19. Growing season (April-August) precipitation was 8.82 inches. Plots were harvested on Sep 18 (flood) and Sep 19 (sprinkler).
|
ANOVA, single factor |
||||||||
|
Available N, lb/ac |
Irrigation |
Percent sucrose |
Root Yield T/acre |
Gross Sucrose Yield, Lb/acre |
Sucrose loss to molasses |
Percent extraction |
Extractable Sucrose, Lb/acre |
|
|
95 |
flood |
19.02 |
26.3 |
10010 |
1.05 |
94.5 |
9456 |
|
|
168 |
flood |
18.92 |
29.2 |
11060 |
1.04 |
94.5 |
10450 |
|
|
189 |
flood |
19.06 |
29.6 |
11290 |
1.15 |
93.8 |
10580 |
|
|
210 |
flood |
18.23 |
31.6 |
11510 |
1.19 |
93.4 |
10750 |
|
|
231 |
flood |
18.34 |
30.0 |
11000 |
1.15 |
93.7 |
10320 |
|
|
252 |
flood |
18.57 |
29.8 |
11060 |
1.14 |
93.8 |
10380 |
|
|
LSD0.05 |
0.49 |
2.4 |
996 |
ns |
ns |
972 |
||
|
121 |
sprinkler |
19.47 |
30.9 |
12010 |
1.22 |
93.7 |
11250 |
|
|
168 |
sprinkler |
18.74 |
31.6 |
11820 |
1.32 |
92.9 |
10980 |
|
|
189 |
sprinkler |
19.09 |
33.6 |
12830 |
1.28 |
93.3 |
11960 |
|
|
210 |
sprinkler |
18.85 |
32.2 |
12160 |
1.40 |
92.5 |
11260 |
|
|
231 |
sprinkler |
18.59 |
32.0 |
11860 |
1.41 |
92.4 |
10950 |
|
|
252 |
sprinkler |
18.58 |
31.3 |
11660 |
1.43 |
92.2 |
10770 |
|
|
LSD0.05 |
ns |
ns |
ns |
ns |
ns |
ns |
||
|
ANOVA, multiple factors |
||||||||
|
95/121 |
|
19.24 |
28.6 |
11010 |
1.14 |
94.1 |
10350 |
|
|
168 |
|
18.83 |
30.4 |
11440 |
1.18 |
93.7 |
10710 |
|
|
189 |
|
19.07 |
31.6 |
12060 |
1.22 |
93.5 |
11270 |
|
|
210 |
|
18.54 |
31.9 |
11830 |
1.29 |
93.0 |
11010 |
|
|
231 |
|
18.47 |
31.0 |
11430 |
1.28 |
93.1 |
10630 |
|
|
252 |
|
18.58 |
30.5 |
11360 |
1.29 |
93.0 |
10580 |
|
|
LSD0.05 |
0.53 |
2.4 |
909 |
0.16 |
1.0 |
874 |
||
|
|
flood |
18.69 |
29.4 |
10990 |
1.12 |
94.0 |
10320 |
|
|
|
sprinkler |
18.89 |
31.9 |
12060 |
1.34 |
92.8 |
11190 |
|
|
LSD0.05 |
ns |
1.4 |
525 |
0.09 |
0.6 |
505 |
||