Lawn Weeds in Alaska

Many different kinds of plants usually grow in close association with each other in nature. Woodlands, roadsides, mountain slopes, marshlands-almost all places not closely attended by man have their own complex plant associations. A lawn comprised of only one or a few grass species is an unnatural, artificial situation. Accordingly, lawns can be kept attractive only by diligent efforts to eliminate undesirable plants and to prevent the natural invasion of turfs by unwanted plants. This battle must be renewed each year. Knowledge of the habits and weaknesses of weeds enables the lawnkeeper to vanquish these foes in every encounter, usually with little expenditure of effort

Forage Crops in Alaska

The foregoing report was reprinted from Alaska’s Agriculture and Forestry, Alaska Rural Development Council Publication No. 3, and the pagination has been changed. Alaska’s Agriculture and Forestry was published in December 1983 by Cooperative Extension Service, University of Alaska and U.S. Department of Agriculture Cooperating, Fairbanks, Alaska. Some of the information in this report represents contributions from research programs of other present and past Alaska Agricultural Experiment Station staff scientists, as indicated by text citations of numbered title s of publications in the reference list above. Foremost among these investigators are R. L. Taylor, W. W. Mitchell, A. L. Brundage, J. D. McKendrick, H. J. Hodgson, and A. C.Wilton.Forage crops can be defined as the aboveground growth (stems, leaves, and sometimes seed heads and immature seeds) of plants that are gathered and fed to herbivorous, domestic animals. Similar plant growth that is grazed directly by livestock in rotational or permanent pastures, but on a less extensive basis than rangelands, is also considered in this discussion. For the most part, forage crops are herbaceous (nonwoody) members of two large plant families—grasses and legumes. The grass family world-wide numbers about 5,000 species, but only about three dozen of these are important as forages. The legume family includes more than 12,000 species world-wide, fewer than 20 of which are considered to be important forage crops

Performance of Indigenous and Introduced Slender Wheatgrass in Alaska, and Presumed Evidence of Ecotypic Evolution

Objectives of this study were to evaluate forage and seed production, winter hardiness, and stand longevity of several collections of native Alaskan slender wheatgrass (Agropyron trachycaulum (Link) Malte), and to compare their performance with introduced cultivars of slender wheatgrass and standard Alaska forage grasses in other species. Eight experiments at the Matanuska Research Farm (61.6° N. Lat.) near Palmer, Alaska demonstrated the superior winter hardiness and forage productivity of indigenous Alaskan slender wheatgrass lines (collected from 62° to 67° N. Lat.) over introduced cultivars ‘Revenue’ (originating at 52° to 53° N) from Saskatchewan and ‘Primar’ (adapted at 46° to 48° N) from the Pacific Northwest

Winterhardiness, Forage Production, and Persistence of Introduced and Native Grasses and Legumes in Southcentral Alaska

This study consisted of four separate field experiments, each of six years duration, conducted at the University of Alaska’s Matanuska Research Farm (61.6oN) near Palmer in southcentral Alaska. Objectives were to compare winterhardiness, forage productivity, and general persistence of introduced grass and legume species, strains, and cultivars from various world sources with Alaska-developed cultivars and native Alaskan species. Twenty-one species of grasses compared (Tables 1 through 4) included eight native to Alaska, four Alaska cultivars, and numerous introduced cultivars and regional strains (one to seven per species) from North America and northern Europe. Legumes included two species of biennial sweetclover and nine species of perennials, six introduced and three native. Each experiment was harvested once near the end of the seeding year and twice annually for five years thereafter

Forage Research Report, No. 4

Cooperating with the Agricultural Research Service, U.S. Department of Agricultur

Comparative Winterhardiness of Cultivated and Native Alaskan Grasses, and Forage Yield and Quality as Influenced by Harvest Schedules and Frequencies, and Rates of Applied Nitrogen

Objectives of this investigation were to compare certain traditional forage grasses with several native Alaskan grass species for forage yield, forage quality as measured by percent crude protein and digestibility (in vitro dry-matter disappearance or percent IVDMD), and comparative winterhardiness in three separate experiments. Management variables included different harvest frequencies (2, 3, and 4 times per year), and five different rates of applied nitrogen (N). Experiments were conducted at the University of Alaska’s Matanuska Research Farm (61.6oN) near Palmer in southcentral Alaska. All species were tall-growing, cool-season perennials. Traditional forage grasses included ‘Polar’ hybrid bromegrass (predominantly Bromus inermis x B. pumpellianus), ‘Engmo’ timothy (Phleum pratense), ‘Garrison’ creeping foxtail (Alopecurus arundinaceus), and a non-cultivar, commercial meadow foxtail (A. pratensis). Native Alaskan species were Siberian wildrye (Elymus sibiricus), slender wheatgrass (Agropyron trachycaulum), arctic wheatgrass (A. sericeum), bluejoint (Calamagrostis canadensis), and polargrass (Arctagrostis arundinacea)

Timothy in Alaska: Characteristics, History, Adaptation, and Management

This report (a) summarizes the characteristics of timothy (Phleum pratense L.) as a forage species, (b) reviews briefly the history of its use in the U.S., and the history of timothy evaluations and culture in Alaska, (c) compares winterhardiness of alpine timothy (P. alpinum L.) with common timothy, (d) compares physiological and morphological characteristics of timothy cultivars from widely divergent latitudinal origins and relates those characteristics to winter survival, (e) compares planting dates and different seeding–year harvest dates for seeding– year forage production and effects on subsequent winter survival and productivity, and (f) evaluates forage production of established timothy under a broad array of harvest schedules and frequencies, and compares the effects of those harvest treatments on subsequent winter survival and first–cut forage yield the following year. All experiments were conducted at the University of Alaska Agricultural and Forestry Experiment Station’s Matanuska Research Farm (61.6oN) near Palmer in southcentral Alaska

Bromegrass in Alaska. II. Autumn Food-Reserve Storage, Freeze Tolerance, and Dry-Matter Concentration in Overwintering Tissues as Related to Winter Survival of Latitudinal Ecotypes

The objective of this study was to acquire improved understanding of factors that influence winter survival of bromegrass (Bromus spp.) at northern latitudes. Four bromegrass strains of diverse latitudinal origins were used: (a) native Alaskan pumpelly bromegrass (B. pumpellianus Scribn.) adapted at 61° to 65°N, (b) the Alaska hybrid cultivar Polar (predominantly B. inermis Leyss. x B. pumpellianus) selected at 61.6°N, and two smooth bromegrass (B. inermis) cultivars, (c) Manchar selected in the U.S. Pacific Northwest (43° to 47°N), and (d) Achenbach originating from Kansas (34° to 42°N)

Effects of Daily Photoperiod/Nyctoperiod and Temperature on Autumn Development of Crown Buds and Dormanc y, Freeze Tolerance, and Storage of Food Reserves in Latitudinal Ecotypes of Biennial White Sweetclover

The investigation consisted of both an outdoor experiment and one conducted indoors in controlledenvironment chambers. Objectives were to determine during late-summer/autumn the effects of (a) the changing daily light/dark (photoperiod/nyctoperiod) pattern, and (b) seasonally lowering temperatures on pre-winter behavior of sweetclover. Measurements were made of certain morphological characteristics and various facets of the winter-hardening process. Both experiments were conducted at the University of Alaska’s Palmer Research Center (61.6°N) in southcentral Alaska