Durum seeding rate, Dryland fallow, Sidney, Montana
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2001 Planted: April 26 Harvested: August 17 |
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variety |
Seeding |
Seedling stand |
|
|
|
|
|
|
|
Plaza |
750,000 |
596,000 |
60.0 |
27.7 |
12.7 |
61.1 |
56.0 |
|
|
|
1,000,000 |
721,000 |
59.8 |
27.2 |
12.8 |
61.2 |
58.6 |
|
|
|
1,250,000 |
1,100,000 |
59.2 |
26.3 |
12.7 |
61.4 |
56.8 |
|
|
|
1,500,000 |
1,200,000 |
58.8 |
26.4 |
13.1 |
61.2 |
57.8 |
|
|
LSD 0.05 |
|
172,000 |
0.7 |
ns |
ns |
ns |
ns |
|
|
Mountrail |
750,000 |
621,000 |
59.8 |
30.4 |
12.7 |
61.5 |
58.7 |
|
|
|
1,000,000 |
867,000 |
59.0 |
30.5 |
13.0 |
61.0 |
59.1 |
|
|
|
1,250,000 |
1,120,000 |
58.8 |
30.1 |
12.6 |
61.4 |
56.9 |
|
|
|
1,500,000 |
1,300,000 |
58.5 |
29.0 |
13.1 |
61.2 |
56.6 |
|
|
LSD 0.05 |
|
229,000 |
ns |
ns |
0.3 |
ns |
ns |
|
|
2002 Planted: May 1 Harvested: August 13 |
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|
variety |
Seeding |
Seedling stand |
|
|
|
|
|
|
|
Plaza |
750,000 |
--- |
61.5 |
25.4 |
14.6 |
58.4 |
36.7 |
|
|
|
1,000,000 |
--- |
61.2 |
23.8 |
15.3 |
57.6 |
36.2 |
|
|
|
1,250,000 |
--- |
61.2 |
25.3 |
14.8 |
57.9 |
37.4 |
|
|
|
1,500,000 |
--- |
61.0 |
24.6 |
15.1 |
57.4 |
38.3 |
|
|
LSD 0.05 |
|
|
ns |
ns |
ns |
ns |
ns |
|
|
Mountrail |
750,000 |
--- |
61.8 |
27.2 |
15.2 |
56.8 |
36.7 |
|
|
|
1,000,000 |
--- |
61.8 |
27.1 |
14.6 |
58.6 |
40.4 |
|
|
|
1,250,000 |
--- |
61.5 |
27.2 |
14.4 |
58.1 |
39.5 |
|
|
|
1,500,000 |
--- |
61.5 |
27.2 |
14.8 |
57.8 |
41.0 |
|
|
LSD 0.05 |
|
|
ns |
ns |
ns |
ns |
3.0 |
|
1 days from planting
Heavy snow fell in early May, after the dryland plots were planted but before the irrigated plots were planted. Temperatures in May were cooler than average and hot, dry weather was experienced during grain fill, which reduced test weights under dryland conditions. A seeding rate of 1,000,000 live seed per acre generally was sufficient under dryland conditions for the best yield production, although this was significant only for the cultivar Mountrail in 2002. Irrigated yield responses varied across years. Under higher yielding conditions, higher seeding rates resulted in higher yield. In 2001, irrigated yields were very low due to severe lodging. Higher seeding rates in 2001 resulted in greater lodging, which in turn resulted in lower yields. Higher seeding rates generally resulted in earlier heading under both dryland and irrigated conditions. Grain protein and test weight were unaffected by seeding rate. Mountrail and Plaza responded similarly to different seeding rates.