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Table 1. Analysis of variance of contrasting seeding rates and hard red spring cultivars across conventional-, reduced-, and no-tillage environments in a wheat-fallow rotation experiment located at Dickinson, ND, during 1995, 1996, and 1997. | |||||||||
Plant stand |
Grain |
||||||||
Yield |
Crude protein |
||||||||
1995 |
1996 |
1997 |
1995 |
1996 |
1997 |
1995 |
1996 |
1997 |
|
Tillage system (T) | 1000 plants/acre |
bu/acre |
% |
||||||
Conventional tillage | 597 |
723 |
750 |
41 |
46 |
33 |
14.5 |
15.2 |
15.2 |
Reduced tillage | 644 |
808 |
792 |
42 |
44 |
36 |
14.3 |
15.2 |
15.4 |
No-tillage | 682 |
800 |
672 |
37 |
51 |
31 |
14.1 |
14.8 |
14.6 |
Seeding rate (SR) | |||||||||
500 000 kernels/acre | 340 |
398 |
390 |
37 |
46 |
32 |
14.4 |
15.0 |
15.0 |
1 000 000 kernels/acre | 661 |
804 |
773 |
41 |
48 |
35 |
14.3 |
15.1 |
15.0 |
1 500 000 kernels/acre | 922 |
1 130 |
1 050 |
42 |
48 |
34 |
14.3 |
15.2 |
15.2 |
Wheat cultivar (WC) | |||||||||
AC Minto | 734 |
788 |
654 |
33 |
42 |
29 |
15.1 |
15.7 |
15.9 |
Amidon | 648 |
777 |
775 |
42 |
46 |
37 |
14.1 |
15.1 |
14.9 |
Bergen | 671 |
849 |
815 |
44 |
52 |
34 |
13.9 |
14.4 |
14.6 |
Grandin | 489 |
739 |
674 |
39 |
47 |
32 |
14.5 |
15.7 |
15.3 |
Norm | 664 |
731 |
773 |
41 |
50 |
34 |
14.1 |
14.5 |
14.6 |
Analysis of variance |
|||||||||
T | NS1 |
* |
NS |
NS |
NS |
NS |
NS |
NS |
* |
SR | * |
* |
* |
* |
* |
NS |
NS |
NS |
NS |
T x SR | NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
WC | * |
* |
* |
* |
* |
* |
* |
* |
* |
T x WC | NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
SR x WC | * |
NS |
* |
NS |
* |
NS |
NS |
NS |
NS |
T x SR x WC | NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
NS |
1
NS = not significant at the P < 0.05 level; * = significant at the P < 0.05 level.Back to 1997 Research Reports Table of
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