منابع مشابه
Grass Seed Production: Weeds, Herbicides and Fertilisers
Four weed species (Bromus mollis, Vulpia sp., Poa annua, Steltaria media) occur in 30% or more of all perennial ryegrass seed samples. Of the listed undesirable species, Avena fatua (wild oat) and Hordeum murinum occurred respectively in 5.3 and 3.5% of ryegrass seedlots. Only 6 herbicides are registered for use in grass seed crops in New Zealand, 2 for wild oat, and 4 for broadleaved weeds. Th...
متن کاملMicroglia: New Roles for the Synaptic Stripper
Any pathologic event in the brain leads to the activation of microglia, the immunocompetent cells of the central nervous system. In recent decades diverse molecular pathways have been identified by which microglial activation is controlled and by which the activated microglia affects neurons. In the normal brain microglia were considered "resting," but it has recently become evident that they c...
متن کاملEffect of Seed Storage on Integrity of Grass Germplasm
Experiment on estimation of qualitative changes in populations of meadow fescue (Festuca pratensis Huds.) after seed storage in different conditions were taken. Phenotypical traits for plants derived from seeds stored during 54 months in two different kind of storage conditions were compared. Storage of meadow fescue seed during 54 months in unfavourable conditions resulted in decrease of initi...
متن کاملEffective Population Size during Grass Germplasm Seed Regeneration.
Effective population size (N(e)) is the key parameter for predicting genetic drift associated with germplasm regeneration. A major factor reducing N(e) below the census population size (N(c)) is variation in seed production among plants in a given population. The objectives of this study were to estimate N(e)/N(c) associated with variation in seed production in three model wind pollinated, pere...
متن کاملRare α₁-antitrypsin genotype in a grass seed worker.
breathlessness. J Pain Symptom Manage 2013; 46: 957–963. 10 Abernethy AP, Currow DC, Frith P, et al. Randomised, double blind, placebo controlled crossover trial of sustained release morphine for the management of refractory dyspnoea. BMJ 2003; 327: 523–528. 11 Johnson MJ, McDonagh TA, Harkness A, et al. Morphine for the relief of breathlessness in patients with chronic heart failure–a pilot st...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 1984
ISSN: 0022-409X
DOI: 10.2307/3899159