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Station Grass and Mixture Trial

Tables 8, 9, and 10 summarize the yields of the mixtures and grasses in the new Station trial seeded in the spring of 1958. This trial is similar to that being carried on at the other branch stations and at the main station in Fargo. Yields continued generally high in these plots, and probably the favorable moisture conditions at the time of seeding are still influencing yields in this trial.

Table 8 gives the 1960 yields from the grass-alfalfa mixtures, and Table 9 summarizes the 2-year average production from the mixtures included in these trials. As shown in Table 8, alfalfa only contributed about one-sixth of the average yield of all mixtures. Actually alfalfa was of major importance as a contributor to yield only in one mixture, that of Lincoln brome and Ladak alfalfa. Here alfalfa produced 1147 pounds out of a total per acre yield of 3,272 pounds. For the most part, alfalfa produced from less than one-fifth of the yield to less than one-fortieth in the mixtures.

Table 9 shows that the intermediate wheatgrass-alfalfa mixtures have produced slightly better on the basis of the 2-year averages than the other mixtures. The average production of these mixtures has been a little over 1 tons per acre. The Russian wildrye-alfalfa mixtures have been somewhat lower producing than the other mixtures, as it would be expected from the growth habit of Russian wildrye. All mixtures together show an unusually good 2-year average production of over 2 1/4 tons.

Table 8. 1960 Hay Yields from Station Grass-Alfalfa Mixture Trial seeded in 1958.
Mixtures Grass Alfalfa Weeds Total Plot Yield-Lbs., Acre
Nordan Crested-Teton Alfalfa 2964 432 --- 3396
Intermediate Wheatgrass-Teton Alfalfa 3306 75 --- 3381
Lincoln Brome-Ladak Alfalfa 2095 1147 30 3272
Intermediate Wheatgrass-Ladak Alfalfa 3041 153 60 3254
Lincoln Brome, Nordan Crest, Ladak Alfalfa 2831 373 --- 3204
Lincoln Brome-Teton Alfalfa 2136 626 3 2765
Manchar Brome-Ladak Alfalfa 2548 216 --- 2764
Russian Wildrye 2355-Teton Alfalfa 1822 485 --- 2307
Russian Wildrye 2355-Ladak Alfalfa 1393 312 11 1716
Average 2460 424 11 2895


Table 9. Two-year hay yields from Station Grass-Alfalfa Mixture Trial seeded in 1958.
Dry weight-Lbs./acre
Mixtures 1959 1960 Total Plot Yield Lbs./acre
Intermediate Whtgr.-Teton Alfalfa 3144 3281 3262
Intermediate Whtgr.-Ladak Alfalfa 2818 3254 3034
Nordan Crested-Teton Alfalfa 2536 3396 2966
Lincoln Brome, Nordan Crested, Ladak Alf. 2447 3204 2825
Lincoln Brome-Ladak Alfalfa 2171 3272 2721
Lincoln Brome-Teton Alfalfa 2329 2765 2547
Manchar Brome-Ladak Alfalfa 2127 2764 2445
Russian Wildrye 2355-Teton Alfalfa 1449 2307 1878
Russian Wildrye 2355-Ladak Alfalfa 1653 1716 1684
Average 2297 2895 2596

The production of the straight grass seedings in the Station Trial is given in Table 10. It is apparent that the 2-year average yields of the straight grass seedings are very nearly as good as the yields of the grass-alfalfa mixtures. The 2-year average yield for all grass varieties is 2,587 pounds per acre (dry-weight) and 2,597 pounds per acre for all mixtures. It is apparent that as yet the presence of alfalfa in mixture with grasses has not contributed substantially to increased yields in this trial. The grass yields are unusually good in this trial.

Intermediate wheatgrass has been the top producer in the trial so far, with an average 2-year production of 3,152 pounds per acre. Summit crested, Lincoln brome, Southland brome, and nordan crested follow quite closely. Northern brome and Manchar brome appear to have somewhat lower average yields than the previously mentioned varieties, and slender wheatgrass and Russian wildrye are distinctly lower in average hay production than the other varieties.

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