Seeds
The seeds are dispersed by wind, small rodents, or attachment to animal fur, within a week of maturity. They are also moved as a contaminant in hay, grain, straw, and machinery. It is an abundant seed producer, with a potential in excess of 300 seeds per plant; seed production per plant is dependent on plant density. Under optimal conditions, it may produce 450 kg of seed per hectare with about 330,000 seeds/kg.
The seeds maintain high viability in dry storage, lasting over 11 years. In the field, under buried conditions, seeds will lose their viability in 2–5 years. The primary limit to germination is inadequate moisture. Seeds can withstand high soil temperatures. Germination is best in the dark or in diffuse light. They germinate most quickly when covered with soil, but do not need to be in contact with bare soil; some leaf litter cover will generally improve germination and establishment of seedlings. Seedlings emerge rapidly from the top 2.5 cm of soil, and a few plants emerge from depths of 8 cm, but not from seeds 10 cm below the surface.
Read more about this topic: Bromus Tectorum
Famous quotes containing the word seeds:
“Agitators are a set of interfering, meddling people, who come down to some perfectly contented class of the community and sow the seeds of discontent amongst them. That is the reason why agitators are so absolutely necessary. Without them, in our incomplete state, there would be no advance towards civilisation.”
—Oscar Wilde (1854–1900)
“Some hours seem not to be occasion for any deed, but for resolves to draw breath in. We do not directly go about the execution of the purpose that thrills us, but shut our doors behind us and ramble with prepared mind, as if the half were already done. Our resolution is taking root or hold on the earth then, as seeds first send a shoot downward which is fed by their own albumen, ere they send one upward to the light.”
—Henry David Thoreau (1817–1862)
“The city mouse eats bread and cheese;—
The garden mouse eats what he can;
We will not grudge him seeds and stocks,
Poor little timid furry man.”
—Christina Georgina Rossetti (1830–1894)