Botanical Abstracts, Volume 12Williams & Wilkins, 1923 |
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Pagina 647
... formation , were investigated in soils from the habitats studied , and account also was taken of differences in soil moisture content , level of water table , light intensity , and content of potassium , phosphorus and calcium . The ...
... formation , were investigated in soils from the habitats studied , and account also was taken of differences in soil moisture content , level of water table , light intensity , and content of potassium , phosphorus and calcium . The ...
Pagina 648
... formations , covering the range pH 3.5-8.0 in steps of 0.5 pH . From these tables summarizing tables are prepared showing the average frequency in each pH class of meadow plants from 78 localities and of woodland plants from nearly 200 ...
... formations , covering the range pH 3.5-8.0 in steps of 0.5 pH . From these tables summarizing tables are prepared showing the average frequency in each pH class of meadow plants from 78 localities and of woodland plants from nearly 200 ...
Pagina 670
... formation , and evolution in the genus Salix . ] Lunds . Univ . Arsskr . 14 : 145 p . , 65 fig . 1918. The author approached the problem of splitting in hybrids in the genus Salix because Wichura's results were not clear . He grew a ...
... formation , and evolution in the genus Salix . ] Lunds . Univ . Arsskr . 14 : 145 p . , 65 fig . 1918. The author approached the problem of splitting in hybrids in the genus Salix because Wichura's results were not clear . He grew a ...
Pagina 671
... formation through crossing is the cause of variability . Varieties of species must be as old as species , not developed from them , as Darwin thought . Species of systematists arise in distinct morphological entities resulting from ...
... formation through crossing is the cause of variability . Varieties of species must be as old as species , not developed from them , as Darwin thought . Species of systematists arise in distinct morphological entities resulting from ...
Pagina 676
... formation of toxins ; ( 4 ) de- terioration of the varieties on account of long continued asexual propagation . The main discussion concerns the last cause . The writer admits that the question is debatable but maintains the affirmative ...
... formation of toxins ; ( 4 ) de- terioration of the varieties on account of long continued asexual propagation . The main discussion concerns the last cause . The writer admits that the question is debatable but maintains the affirmative ...
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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.