Seed Travellers Studies of the Methods of Dispersal of Various Common Seeds
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In our eReader you can find the full English version of the book. Read Seed Travellers Studies of the Methods of Dispersal of Various Common Seeds Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Seed Travellers Studies of the Methods of Dispersal of Various Common Seeds
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But the birds scatter nearly as many as they devour. When the snowy surface holds the seeds from falling, the latter are in position to be driven over the surface by the wind. If there is an icy crust they are likely to go alone ; if not, they may be carried with the drifting snow.
While this method of seed dispersal is universal throughout our northern states, it operates most freely in the plains regions of the west and northwest. To determine how effective this means of dispersal is, Prof. H.... L. Bolley of North Dakota recently performed the following experiment. On Jan. 31, 1895, when there was a light snowfall upon crusted snow, with the wind constant from the northwest at the rate of twenty miles an hour, a peck of mixed seed was poured upon the crust. Thirty rods distant, at right angles to the course of drifting, a three-inch trench in the snow, four rods long, served to catch the drifting seeds. At the end of ten minutes the trench was found to contain : THE WIND AS A SEED DISTRIBUTER.
What to read after Seed Travellers Studies of the Methods of Dispersal of Various Common Seeds?
You can find similar books in the "Read Also" column, or choose other free books by Clarence Moores Weed to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
But the birds scatter nearly as many as they devour. When the snowy surface holds the seeds from falling, the latter are in position to be driven over the surface by the wind. If there is an icy crust they are likely to go alone ; if not, they may be carried with the drifting snow.
While this method of seed dispersal is universal throughout our northern states, it operates most freely in the plains regions of the west and northwest. To determine how effective this means of dispersal is, Prof. H.... L. Bolley of North Dakota recently performed the following experiment. On Jan. 31, 1895, when there was a light snowfall upon crusted snow, with the wind constant from the northwest at the rate of twenty miles an hour, a peck of mixed seed was poured upon the crust. Thirty rods distant, at right angles to the course of drifting, a three-inch trench in the snow, four rods long, served to catch the drifting seeds. At the end of ten minutes the trench was found to contain : THE WIND AS A SEED DISTRIBUTER.
What to read after Seed Travellers Studies of the Methods of Dispersal of Various Common Seeds?
You can find similar books in the "Read Also" column, or choose other free books by Clarence Moores Weed to read onlineMoreLess
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