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ROTATION & TILLAGE TRIALS - 1952

The 1952 trials complete 46 years of study in Dry Land Soil Management at the Dickinson Experiment Station. All trials were grown on uniform cropping the first year, 1907, and for that reason, yields from the 1907 trial are not included in the long time average. This leaves 45 years' data available for a comparison of rotations, tillage and fertility problems under conditions represented at this station.

In the following summary tables, 1952 yields for the four principal crops included in these trials, wheat, oats, barley and corn, are compared with annual averages for the past five years and with the 45 year average for the more important cultural methods under investigation.

Table 4 - Summary - Wheat Yields - 1952
Rotation and Tillage Trials, Dickinson Experiment Station, Dickinson, North Dakota


Cultural Method

No. Plots

1947

1948

1949

1950

1951

1952


1908- 1952

Relative Yields
1908-1952
Fallow - 100%
Fallow 3 23.3 41.2 9.7 23.1 23.9 10.7 20.7 100
Green Manure 51 27.6 37.1 6.5 24.5 23.7 8.9 18.8 91
Disked Cornground 9 25.1 34.7 10.3 18.4 21.4 9.8 18.2 88
Spring Plowed 2 18.6 26.6 6.1 17.9 15.3 7.8 15.8 76
Fall Plowed 42 23.2 27.8 9.1 21.9 19.8 11.4 16.2 78
Continuous:
Spring Plowed 1 15.0 21.7 3.2 14.5 13.7 7.5 11.5 56
Fall Plowed 1 11.8 19.5 2.7 8.7 13.0 9.2 11.0 53
Alternate Fallow and wheat 1 18.5 34.5 7.2 17.5 22.2 8.2 19.6 95
1Average of three plots, 15, 17 and 32 only in 1952
2Includes wheat in manured rotation 62 which has a 45 year average of 18.5 b.p.a.

 

Table 5 - Summary - Oat Yields - 1952
Rotation & Tillage Trials, Dickinson Experiment Station, Dickinson, North Dakota


Cultural Method

No. Plots

1947

1948

1949

1950

1951

1952

1908- 1952
Relative Yields
1908-1952
Fallow - 100%
Fallow 3 69.9 89.7 24.9 51.9 62.2 27.3 46.8 100
Green Manure 3 65.4 87.4 15.9 58.7 54.6 24.6 45.2 97
Disked Cornland 5 61.1 71.7 22.7 40.8 54.2 22.1 37.2 80
Spring Plowed 6 1 63.8 62.2 24.2 41.5 40.0 20.9 34.6 74
Fall Plowed 5 60.5 48.4 19.1 46.9 37.1 26.3 32.1 69
Sod 3 65.5 49.2 23.6 43.1 44.9 26.5 33.8 72
Continuous:
Spring Plowed 1 37.2 31.6 13.8 30.6 42.5 16.9 26.6 57
Fall Plowed 1 38.1 29.1 8.1 43.0 33.8 20.0 24.6 53
Alternate Oats and fallow 1 64.7 62.2 23.4 53.8 60.6 29.4 45.5 97
1Includes oats in manured rotation 62-45 year average of 37.7 b.p.a.

 

Table 6 - Summary - Barley yields - 1952
Rotation & Tillage Trials, Dickinson Experiment Station, Dickinson, North Dakota


Cultural Methods

No. Plots

1947

1948

1949

1950

1951

1952

1908- 1952
Relative Yields
1908-1952
Fallow - 100%
Fallow 2 28.1 33.8 5.8 25.4 43.8 25.2 27.0 100
Disked Cornland 2 32.2 38.4 14.1 24.0 35.2 15.9 21.2 79
Spring Plowed 1 16.9 23.1 5.8 29.6 22.7 12.4 16.2 60
Continuous:
Spring Plowed 1 21.5 22.3 7.7 19.4 28.1 16.9 16.0 59
Fall Plowed 1 23.8 18.3 1.5 12.9 29.2 20.0 14.8 54
Alternate barley and fallow 1 43.5 54.2 12.7 32.7 38.5 29.4 24.2 89

 

Table 7 - Summary - Corn Yields - 1952
Rotation & Tillage Trials, Dickinson Experiment Station, Dickinson, North Dakota

CORN GRAIN

Cultural Method

No. Plots

1947

1948

1949

1950

1951

1952

1908- 1952
Relative Yields
1908-1952
S.P. 100%
Spring Plowing 16 42.6 30.0 13.9 22.0 23.2 16.0 17.6 100
Fall Plowing 4 37.4 30.2 13.7 24.1 25.5 18.1 16.2 92
Continuous:
Spring Plowing 1 27.8 26.4 5.0 22.1 29.1 14.9 19.0 108
Fall Plowing 1 28.4 28.4 14.1 20.4 34.4 17.6 18.9 107
Alternate Corn and fallow 1 15.4 26.4 13.8 16.4 29.1 32.9 20.9 119

 

CORN SILAGE

Cultural Method

No. Plots

1947

1948

1949

1950

1951

1952*

1908- 1952
Relative Yields
1908-1952
S.P. 100%
Spring Plowing 16 12418 8902 4526 7990 7928 5569 7168 100
Fall Plowing 4 9836 8860 3920 7224 8726 5450 6268 88
Continuous:
Spring Plowing 1 8640 7100 2100 7900 8180 2700 6380 89
Fall Plowing 1 6260 6780 4720 6360 9520 4600 6122 85
Alternate Corn and fallow 1 4120 6600 5740 6600 7800 7000 6900 96
* 1952 crop harvested as silage at proper stage of growth. Silage yields for previous years calculated on basis of corn fodder yield figured at 50 percent of silage weight.

 

Results in 1952, both for rotations and for tillage methods, followed rather closely the pattern which has been established over the long period these trials have been conducted at the Dickinson Experiment Station, with the exception of fall plowing which was unusually good in comparison with previous years. This years trial again pointed up the need for, and the value of, proper tillage and crop rotation in western North Dakota in a dry year. The value of corn as a silage crop was demonstrated again, with 22 of the 23 corn plots averaging between two and one half and three tons of good quality feed per acre.


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