Twisted Conjugacy Classes in Lattices in Semisimple Lie Groups

Given a group automorphism $\phi:\Gamma\to \Gamma$, one has an action of $\Gamma$ on itself by $\phi$-twisted conjugacy, namely, $g.x=gx\phi(g^{-1})$. The orbits of this action are called $\phi$-conjugacy classes. One says that $\Gamma$ has the $R_\infty$-property if there are infinitely many $\phi$-conjugacy classes for every automorphism $\phi$ of $\Gamma$. In this paper we show that any irreducible lattice in a connected semi simple Lie group having finite centre and rank at least 2 has the $R_\infty$-property.Comment: 6 page

Growth and Yield of Legumes in Mixtures with Grasses on a Mountain Range

Nine legumes, including three strains of variegated alfalfa, were planted in mixture with each of four grasses in the fall of 1950. Alfalfa A-169 was the most productive legume. In 1965 it yielded 100 lb/acre, about 35% more than cicer milkvetch or Ladak alfalfa and 160 lb/acre more than sickle milkvetch or Rhizoma alfalfa. Siberian alfalfa was clearly inferior to all the above. Flat pea, birdsfoot trefoil, and perennial vetch disappeared from the plots early in the study. Intermediate and crested wheatgrasses were more productive than smooth brome, both in combination with legumes and as pure stands. The highest yielding plots in 1965 were those originally sown to mountain brome. This short-lived grass afforded less competition to the legumes which became well established prior to invasion by crested and intermediate wheatgrass or smooth brome grass. The use of a legume with the grass, on the average, increased production by 144 lb/acre.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Germinative Characteristics of Grass Seed Under Snow

This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Disappearance of Plant Material Under a Winter Snow Cover

Disappearance of plant material from fine—mesh nylon bags occurred during the late fall, winter, or early spring when mountain ranges in central Utah are generally snow covered. Quantitative loss of matter from leaves and stems of two grasses and two broad—leaved forbs was mostly attributed to decomposition by fungi and bacteria and to leaching. Loss of material from bags in direct contact with the snow cover during two consecutive winter periods averaged 30% for the relatively coarse Agropyron trachycaulum, 39% for Bromus inermis, 48% for Lupinus alpestris, and 51% for Mertensia arizonica var, leonardi. The ratio of leaf to stem weights decreased with all aspects

Root and Shoot Growth Following Preplanting Treatment of Grass Seed

Seeds in the crested wheatgrass complex were placed under favorable germination conditions for periods of 10 to 90 hr, superficially dried and then planted in a greenhouse. Root lengths 3 to 6 days after planting indicated a 1 to 2-day advantage from preplanting treatment. On the basis of present data, near maximum response should result from treatments at 50 to 70F for as much as 40 to 70 hr duration. There was considerable variation in the response of different seed sources.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Preplanting Treatment to Hasten Germination and Emergence of Grass Seed

Seeds in the crested wheatgrass complex were placed under conditions favorable for germination for periods of 10 to 90 hr, superficially dried, and then planted on a greenhouse bench. The most effective treatment was at 63 F for 60 to 70 hr. Seedlings resulting from this treatment emerged about 40 hr ahead of untreated seeds. The study suggests that if field tests yield similar results, pretreatment of seed may contribute towards greater success in range seeding.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Seeding Pelleted and Unpelleted Seed on Four Range Types

This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Grazing Crested Wheatgrass

This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Emergence and Yield of Six Range Grasses Planted on Four Dates Using Natural and Treated Seed

Six range grasses were compared by sowing natural and treated seed at four dates. Seedlings from treated seeds emerged sooner in all species except Russian wildrye for the first three planting dates. The fourth planting was a failure for both treated and natural seeds. The advantages of faster emergence from treated seeds did not result in more plants at 35-46 days nor in higher yield. Intermediate wheatgrass emerged first, followed by Russian wildrye and Siberian, crested, beardless, and fairway wheatgrasses. Intermediate wheatgrass yielded most, followed by crested, Siberian, and fairway wheatgrasses, Russian wildrye, and beardless wheatgrass.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Differential Tolerance of Some Arid-Range Wheatgrasses to Snow Mold

Snow mold is most severe under a prolonged spring snow cover, where temperatures are favorable for growth of certain fungi. In the spring of 1971 a replicated plot containing 30 accessions of wheatgrasses provided an opportunity to study differential tolerance to snow mold. On the basis of the percent of 1-year-old plants killed, fairway wheatgrass A-12477X (mean of 4 accessions) was most susceptible with 29.4% mortality, fairway wheatgrass A-1770 (3 accessions) averaged 13.7%, and fairway wheatgrass NM-251 (5 accessions) averaged 2.7%. Crested wheatgrass Nordan (4 accessions) averaged 4.9% mortality. Crested wheatgrass A-1874 (1 accession) averaged 11.3% and crested wheatgrass PI 277354 (2 accessions) averaged 2.3%. Five other sources of crested wheatgrass had significantly less mortality than Nordan. Siberian wheatgrass (5 accessions) averaged 4.2% mortality. Intermediate wheatgrass (1 accession) had no mortality, and only 2 plants out of 300 showed moderate injury.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202