Author: Stephen Charles AldermanPublisher:
ISBN:
Category : Forage plants
Languages : en
Pages : 12
Book Description
Distribution and Severity of Ergot and Blind Seed in the Forage Grass Seed Production Region of the Willamette Valley of Oregon
Author: Stephen Charles AldermanPublisher:
ISBN:
Category : Forage plants
Languages : en
Pages : 12
Book Description
Cool-season Forage Grasses
Author: Lowell E. MoserPublisher:
ISBN:
Category : Nature
Languages : en
Pages : 874
Book Description
The Distribution, Growth Habits, and Control of German Velvetgrass (Holcus Mollis L.) in Western Oregon
Author: William O. LeePublisher:
ISBN:
Category : Grasses
Languages : en
Pages : 234
Book Description
A study was conducted on German velvetgrass (Holcus mollis L.), a weedy, rhizomateous perennial grass introduced in the United States in relatively recent years, The purpose of this study was to learn more about its distribution, growth habits, and control under conditions found in Western Oregon. German velvetgrass infestations of economic importance were found in localized sections of Linn, Marion, and Clakamas Counties. These infestations were found to occur almost exclusively on four closely related soil types, Olympic, Polk, Aiken, and Cascade. All of these soils are well drained, residual soils developed on consolidated bedrock and derived almost entirely from basalt, andesite, or other igneous rocks. These soils are referred to Iocally as, "red hill soils." While the acreage now infested is small, this species should be considered as a potential threat to large areas of Western Washington, Western Oregon, and Western California having soil and climatic conditions similar to those found on the "red hill soils" of the Willamette Valley of Oregon. Steps should be taken to stop its spread and eliminate existing infestations. While this species is reported to produce little seed in its native area of adaptation, it was found to produce large amounts of seed under Western Oregon conditions. Seed yields of over 400 lb/A were found. The seeds, which are somewhat similar in size and shape to those of Kentucky bluegrass, were found to remain viabre in the soil for a number of years. When buried at one inch, seeds remained viable for two and one-half years. After four and one-half years burial, seed at the four and eight inch depths still showed 8 and 19 percent viability. Seeds of this species emerged and became established from depths of one to one and one-fourth inches but failed to emerge when buried at greater depths. Temperature but not light affected germination of this species. Maximum germination occurred at 15°C. Rhizome formation on new seedlings occurred 35 to 40 days after emergence and when the seedlings were well stooled, three inches or more in height, and had at least 40 leaves. A study of the vertical distribution of rhizomes indicated that they were distributed throughout the tilled portion of the soil profile but did not penetrate below the tillage zone. The rhizomes formed an almost solid mat within the tilled zone which amounted to 14,392 lbs. dry matter/A in the field sampled. Observations made in established Highland bentgrass seed fields showed that German velvetgrass made a continual advance into bentgrass sod. In a very heavy sod the invasion front moved forward about seven-tenths of one foot/year. In a less dense sod the advance was about one foot/year. Rhizomes of this species were found to be destroyed by various outside influences. Burial of the rhizomes to depths greater than eight inches, exposure to temperatures above 100°F or below 20°F for short periods of time resulted in death of the rhizomes. Ethyl N, N-di-n-propylthiolcarbarnate (EPTC), when applied at rates from two to six lb/A gave season long control of German velvetgrass. When applied for three consecutive years established stands were eliminated. crops such as corn, alfalfa, red clover, flax, and crimson clover were grown following treatment with EPTC allowing crop production during the control period.
Burning Grass Seed Fields in Oregon's Willamette Valley
Author: Frank S. ConklinPublisher:
ISBN:
Category : Burning of land
Languages : en
Pages : 68
Book Description
Factors Affecting Vegetable Seed Production in the Willamette Valley, Oregon
Author: Harold Lester SchudelPublisher:
ISBN:
Category : Seed industry and trade
Languages : en
Pages : 336
Book Description
Oregon's seed crops
Author: British Columbia Rangeland Seeding Manual
Author: Allan DobbPublisher:
ISBN: 9780772666437
Category : Range management
Languages : en
Pages :
Book Description
Plants Poisonous to Horses
Author: Mellisa OffordPublisher:
ISBN: 9781741513110
Category : Horses
Languages : en
Pages : 121
Book Description
Fodder Crops and Amenity Grasses
Author: Beat BollerPublisher: Springer Science & Business Media
ISBN: 1441907602
Category : Science
Languages : en
Pages : 527
Book Description
Grassland farming in Europe was already established during the settlement of the rst farmers together with their domesticated animals after the last ice age. Since then, grassland provides the forage basis to feed ruminant animals for the p- duction of meat and milk. Depending on the ecological conditions and intensity of usage, various plant communities with different species developed, displaying a rich biodiversity. With the introduction of improved crop rotations at the end of the 16th century, grasses and legumes were also grown to an important extent as forage crops on arable land. In the last decades the importance of amenity grasses increased markedly, due to the demand of the society for new usages like landscape protection. Around 1900 interested farmers and academics identi ed the need for gra- land improvement through systematic selection and seed production. This marks the beginning of breeding and research in companies but also at universities and specialized research institutes. Plant collection started with many of the species that are still of importance today. The collected materials were grouped according to the intended use and some type of phenotypic selection was applied. Seed mul- plication of such populations was performed in pure stands and the harvested seed was marketed. Although the vegetative biomass and its quality are of utmost imp- tance in forage crop breeding, it is the seed yield potential which determines the commercial success of a new variety.
Ergot
Author: Vladimir KrenPublisher: CRC Press
ISBN: 0203304195
Category : Health & Fitness
Languages : en
Pages : 499
Book Description
This volume provides readers with biotechnological aspects of ergot alkaloid production and genetic and physiological data. Toxicology and environmental risks of ergot infection and contamination of food and forage are also detailed