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New Intermediate Wheatgrass Plots

The 1960 yields of hay from the new intermediate wheatgrass trial seeded in 1958 are given in Table 3. The data of the table shows that the stands have some weeds in them with South Dakota #20 and A-12496 showing appreciable amounts of weed growth. There has been little or no deterioration of stands as yet, as evidenced by the general lack of invading crested wheatgrass. The range in yields of seeded grass was from 1317 pounds per acre for Amur, to 1999 pounds per acre for Idaho #3. Idaho #3 appeared to have substantially better production than the other varieties in the 1960 season.

Table 3. Composition of 1960 Yields from Intermediate Wheatgrass Plots Seeded in 1958.
Composition of Yield
Variety Grass Other Grass Weeds Total Plot Production - Lbs/Acre
Idaho #3 1999 --- 34 2033
South Dakota #20 1641 13 209 1863
Nebraska 50 1623 --- 17 1639
N. Dak. Intermediate 1584 --- 45 1629
A-12496 1361 --- 199 1560
Idaho #4 1497 --- 48 1545
Ree Wheatgrass 1491 2 29 1522
Greenar 1451 --- 23 1474
Amur (A-13046) 1317 --- 42 1359
Average 1552 2 72 1626

The two-year average yields (1959-1960) are given in Table 4. On the basis of the two-year average yields, Idaho #3 and South Dakota #20 would appear to be somewhat more productive than the other strains in this trial. Amur appears to be somewhat less productive than the other strains, and the stands of this variety appear in the field to be less vigorous than the stands of the other varieties. A-12496 initially showed relatively poor stands, but the stands of this strain have thickened-up, and the variety made fairly good growth in the 1960 season. The general vigor and good hay production of young stands of intermediate wheatgrass is evidenced by the over-all average plot yield of 1384 pounds per acre for the two years of the trial.

Table 4. Average Hay Yields from Intermediate Wheatgrass Plots seeded in 1958.

Oven-dry weight - lbs./acre

Variety

1959 1960 2-Year Average Yield
Idaho #3 1207 2033 1620
South Dakota 20 1282 1863 1572
Nebraska 50 1151 1639 1395
Ree Wheatgrass 1269 1522 1395
N. Dak. Intermediate 1145 1629 1387
Greenar 1187 1474 1330
Idaho #4 1044 1545 1294
Amur (A-13046) 1142 1359 1250
A-12496 860 1560 1210
Average 1143 1626 1384

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