Botanical Abstracts, Volume 12Williams & Wilkins, 1923 |
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Pagina 627
... temperatures above 100 ° F . are frequent in summer . There are also violent winds which accelerate evapora- tion and are an important factor in erosion . The soil is comparatively rich . Excessive sheep grazing and burning combined ...
... temperatures above 100 ° F . are frequent in summer . There are also violent winds which accelerate evapora- tion and are an important factor in erosion . The soil is comparatively rich . Excessive sheep grazing and burning combined ...
Pagina 645
... temperature and other environmental factors . Maximum diatom production occurs near the summer solstice because of increase in light and temperature . The Kofoid bucket was found to be practical and accurate . It is believed that plans ...
... temperature and other environmental factors . Maximum diatom production occurs near the summer solstice because of increase in light and temperature . The Kofoid bucket was found to be practical and accurate . It is believed that plans ...
Pagina 647
... temperatures below 0 ° C . throughout the day.-G. Kempff . 3824. NICHOLS , G. E. A working basis for the ecological classification of plant communities . Ecology 4 : 11-23 . 1923. - This paper is in the nature of a revision and ...
... temperatures below 0 ° C . throughout the day.-G. Kempff . 3824. NICHOLS , G. E. A working basis for the ecological classification of plant communities . Ecology 4 : 11-23 . 1923. - This paper is in the nature of a revision and ...
Pagina 650
... temperature was never low enough to counteract any influence moonlight might exert . When the nights were clear and not too humid , the strong moonlight effected the partial resumption of the day position of the leaflets , and also ...
... temperature was never low enough to counteract any influence moonlight might exert . When the nights were clear and not too humid , the strong moonlight effected the partial resumption of the day position of the leaflets , and also ...
Pagina 651
... temperature at the surface and at 1 - foot depth , and soil moisture . The south exposure bears a stand of western ... temperatures prevailing farther down the slope . The north slope has a cover of Engel- mann spruce at its base and a ...
... temperature at the surface and at 1 - foot depth , and soil moisture . The south exposure bears a stand of western ... temperatures prevailing farther down the slope . The north slope has a cover of Engel- mann spruce at its base and a ...
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Populaire passages
Pagina 741 - Gazette, vol. 74 ] [442 expected under this assumption, but it is preferred to use the theoretical value until further data on this point are available. It is assumed that the magnitude of the excess depression is a measure of the quantity of water held in such a way as to be unavailable for the solution of the sugar. The values obtained may be calculated to percentage "bound
Pagina 785 - BOTANICAL ABSTRACTS A monthly serial furnishing abstracts and citations of publications in the international field of botany in its broadest sense, beginning with the year 1918 PUBLISHED MONTHLY UNDER THE DIRECTION OP THE BOARD OF CONTROL OF BOTANICAL ABSTRACTS, INC.
Pagina 642 - Traité des arbres et arbustes qui se cultivent en France en pleine terre...
Pagina 769 - there is no evidence of the presence of soluble toxins in normally aerated soils sufficiently supplied with plant food and with calcium carbonate, but toxins may occur on 'sour* soils badly aerated and lacking in calcium carbonate, or on other exhausted soils.
Pagina 913 - Les dispositions de la loi du 28 janvier 1921 autorisant provisoirement le Gouvernement à s'opposer à l'exploitation excessive de certains bois et de certaines forêts appartenant à des particuliers...
Pagina 821 - Is the whole of Mendelism perhaps nothing but an establishment of very many chromosomical irregularities, disturbances or diseases of enormously practical and theoretical importance but without deeper value for an understanding of the "normal...
Pagina 666 - WALDRON, LR, 1921. — Inheritance of Rust Resistance in a Family Derived from a Cross Between Durum and Common Wheat.
Pagina 903 - Untersuchungen über Echtfärbung der Zellkerne mit künstlichen Beizenfarbstoffen und die Theorie des histologischen Färbeprozesses mit gelösten Lacken von Prof.
Pagina 635 - List of Serials Currently Received in the Library of the US Department of Agriculture: Exclusive of US Government Publications and Publications of the State Agricultural Colleges and Experiment Stations: Arranged by Title, by Subject, and by Region.
Pagina 1111 - BRITTON, NL and JN ROSE. The Cactaceae : Descriptions and illustrations of plants of the cactus family.