Tillage Trials

North Dakota State University * Dickinson Research Extension Center
1089 State Avenue, Dickinson, ND 58601-4642 Voice: (701) 483-2348 FAX: (701) 483-2005

Wheat-Pea Tillage Trial, Wheat 2001				Dickinson, ND

	Soil Moisture	Plant Stand	Tillers per Plant	Growth Stage	Days to Head	Spike Count	Residue
	feet	plants/acre		leaves		spikes/acre	%
Tillage
Conventional	1.3	558,922	3.2	8.8	64	1,278,259	21
Reduced	1.4	690,493	3.9	9.3	63	1,619,837	33
None	2.1	962,237	2.7	8.9	63	1,804,542	94
F-test	*	*	NS	NS	NS	*	*
Rotation
Wheat/Pea	1.5	739,157	3.4	9.0	63	1,600,776	41
Wheat/Wheat	1.7	735,277	3.0	9.0	63	1,534,316	58
F-test	NS	NS	NS	NS	NS	NS	*

Trial Mean	1.6	737,217	3.2	9.0	63	1,567,546	49
C.V.%	21.3	12.3	24.6	9.7	3.4	9.4	14

* = significant at the P<.05 level
NS = not significant

Wheat-Pea Tillage Trial, Wheat 2001			Dickinson, ND

	Plant Height	Yield	Test Weight	Protein	Seeds per Pound	Returns
	inches	bu/ac	lbs/bu	%		$/ac
Tillage
Conventional	34	46.5	56.8	15.5	16,020	131.71
Reduced	34	47.0	57.3	15.2	17,327	133.23
None	35	55.9	58.8	14.3	16,677	151.38
F-test	NS	*	*	*	NS	NS
Rotation
Wheat/Pea	35	53.7	57.9	15.0	16,391	149.10
Wheat/Wheat	33	45.9	57.3	15.0	16,958	128.45
F-test	*	*	NS	NS	NS	*

Trial Mean	34	49.8	57.6	15.0	16,675	138.78
C.V.%	2.6	8.5	1.7	2.7	5.5	10.5

* = significant at the P<.05 level
NS = not significant

Wheat-Pea Tillage Trial, Pea 2001			Dickinson, ND

	Height	Test Weight	Crude Protein	Grain Yield		Returns	2 Year Average
	Height	Test Weight	Crude Protein	2000	2001	Returns	2 Year Average
	in	lbs/bu	%	lbs/ac		$/ac	lbs/ac
Tillage
Conventional	26.8	62.9	25.8	2,035	2,761	92.05	2,398
Reduced	25.5	62.1	25.3	2,611	2,762	92.05	2,687
None	26.5	62.8	25.1	3,472	3,011	100.37	3,242

Trial Mean	26.2	62.6	25.4	2,706	2,845	94.82	2,775
C.V. %	13.6	1.2	1.4	11.5	9.8	9.8	--
LSD .05	NS	NS	NS	539	NS	NS	--

NS = not significant
Returns calculated using market value of $2.00/bu

Wheat-Pea Tillage Trial, Pea 2001				Dickinson, ND

	Seeds per Pound	Soil Moisture	Residue Cover	Plant Count	Days to Flower	Flower Duration
		feet	%	plants/acre		days
Tillage
Conventional	2,058	1.6	26	233,791	59	14
Reduced	2,046	1.6	58	264,153	58	15
None	2,050	2.4	93	260,105	60	14

Trial Mean	2,051	1.9	59	252,683	58.8	14.3
C.V. %	10.7	17.4	12.3	13.5	1.6	6.3
LSD .05	NS	0.6	12	NS	NS	NS

NS = not significant

Wheat-Canola Tillage Trial, Wheat 2001				Dickinson, ND

	Soil Moisture	Plant Stand	Tillers per plant	Growth Stage	Days to Head	Spike Count	Residue
	feet	plants/acre		leaves		spikes/acre	%
Tillage
Conventional	1.1	556,139	3.0	9.3	65	1,493,832	11
Reduced	1.6	659,371	3.8	9.1	63	1,523,869	29
None	1.8	870,896	2.6	9.3	61	1,727,623	88
F-test	*	*	NS	NS	NS	NS	*
Rotation
Wheat/Canola	1.5	702,891	3.0	9.3	63	1,586,269	34
Wheat/Wheat	1.6	688,047	3.3	9.2	63	1,577,161	52
F-test	NS	NS	NS	NS	NS	NS	*

Trial Mean	1.5	695,469	3.1	9.2	63	1,581,715	43
C.V.%	17.8	18.0	31.9	5.1	2.5	18.4	18.1

* = significant at the P<.05 level
NS = not significant

Wheat-Canola Tillage Trial, Wheat 2001			Dickinson, ND

	Plant Height	Yield	Test Weight	Protein	Seeds per Pound	Returns
	inches	bu/ac	lbs/bu	%		$/ac
Tillage
Conventional	32	37.6	56.8	16.3	17,066	108.31
Reduced	33	44.3	57.2	15.4	16,986	125.94
None	33	44.9	58.3	14.9	17,304	125.14
F-test	NS	NS	*	*	NS	NS
Rotation
Wheat/Canola	33	42.2	57.5	15.6	16,970	119.74
Wheat/Wheat	33	42.3	57.3	15.4	17,267	119.85
F-test	NS	NS	NS	NS	NS	NS

Trial Mean	24	42.3	57.4	15.5	17,119	119.79
C.V.%	2.3	10.9	2.0	2.3	7.3	11.5

* = significant at the P<.05 level
NS = not significant

Wheat-Canola Tillage Trial, Canola 2001					Dickinson, ND

	Residue Cover	Test Weight	Oil @ 8.5% Moisture	Grain Yield		2 Year Average
	Residue Cover	Test Weight	Oil @ 8.5% Moisture	2000	2001	2 Year Average
	%	lbs/bu	%	lbs/ac		lbs/ac
Tillage
Conventional	16	46.3	43.3	391	926	659
Reduced	39	46.2	43.9	638	999	819
None	85	47.6	44.2	860	1117	989

Trial Mean	47	46.7	43.8	630	1014	822
C.V. %	35.2	4.3	2.9	23.8	20.2	--
LSD .05	28	NS	NS	NS	NS	--

NS = not significant

Wheat-Canola Tillage Trial, Canola 2001			Dickinson, ND

	Seeds per Pound	Soil Moisture	Days to Flower	Flower Duration	Plant Count
		feet		days	plants/acre
Tillage
Conventional	142,028	1.4	55	21	400,278
Reduced	142,218	1.3	53	22	268,202
None	143,841	1.8	50	24	248,466

Trial Mean	142,696	2	53	22	305,649
C.V. %	6.8	21.3	2.1	9.0	29.5
LSD .05	NS	NS	2	NS	NS

NS = not significant

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Email: drec@ndsuext.nodak.edu