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Comparisons of Yields on Stubble Land Tilled in the Spring With the Mold-Board Plow, the One-Way Disk and the Doubledisk

An experiment comparing the moldboard plow and the double disk for the preparation of stubble land to be seeded to small grain was begun in 1924 and discontinued in 1957. Yields this 34 year period clearly showed spring plowing to be the better tillage method. Yields from spring plowing averaged 3.5 bushels per acre more for the entire period and were higher than yields from disked stubble in 26 of the 34 year. There were three crop failures for both methods, yields were equal four years, and yields from disked stubble were slightly higher than from spring plowed stubble in only two years, 1931 and 1937. In both of these years yields were so low that for all practical purposes they could also be considered crop failures.

In 1955 another trial was begun to compare the yields on stubble land tilled in the spring with the moldboard plow, the one-way disk and the double disk. Yields from this trial for the five year period, 1955-1959, are summarized in Table 15. These results show that spring plowing with a moldboard plow is the best method of tilling stubble land to be seeded to small grain in western North Dakota. Double disking is easily the poorest tillage method of the three compared.

This trial was discontinued in 1960 because it was located on land belonging to the Dickinson State Teachers College, which was returned to the College this year.

Table 15. Summary of Wheat Yields on Stubble Land tilled in the Spring with the moldboard plow, the double disk and the one-way disk, 1955-1959.
Year Average Yield in Bushels Per Acre
Spring Plowing One-way disking Double disking
1955 22.0 17.6 14.5
1956 14.2 11.5 9.3
1957 18.0 16.7 15.5
1958 19.3 18.7 15.1
1959 6.3 9.5 6.3
Average 16.0 14.8 12.1

Annual Cool Season Forage Production Trial

Yields from the 1960 annual cool season forage production trial are given in Table 16.

Table 16. Annual Cool Season Forge Production Trial - 1960
Description Yield on Summer Fallow lbs/acre 12% M.
1 2 3 Average % Moisture at harvest
Hairy Vetch 1393 1184 1201 1259 75.7
Austrian Winter Peas 1423 1081 1255 1253 73.8
Oats and Vetch 1562 1489 1426 1492 67.8
Oats and Peas 1379 1235 1111 1242 67.2
Oats 1742 981 1536 1420 61.3
Oats + 50 Lbs. N Per Acre 1297 1374 1008 1226 68.8
Oats + 100 Lbs. N Per Acre 1446 1319 1162 1309 70.7
 
Description Yield on Stubble Lbs. Per Acre @ 12
1 2 3 Average % Moisture at harvest
Hairy Vetch 1277 1331 1197 1268 71.7
Austrian Winter Peas 1035 1367 1280 1227 73.4
Oats and Vetch 1267 1485 1548 1433 60.8
Oats and Peas 1168 1350 1461 1326 63.4
Oats 1735 1437 1381 1518 60.9
Oats + 50 Lbs. N Per Acre 1330 1458 1208 1332 63.4
Oats + 100 Lbs. N Per Acre 1442 1477 1222 1380 68.1

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