Botanical Abstracts, Volume 14Williams & Wilkins, 1925 |
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Pagina 18
... Amer . Jour . Botany 10 : 450-457 . 2 pl . 1923. In the early history of the pollen mother - cell there are visible chromatin masses , varying in size and usually occurring in pairs , which corre- spond in number to the chromosomes at ...
... Amer . Jour . Botany 10 : 450-457 . 2 pl . 1923. In the early history of the pollen mother - cell there are visible chromatin masses , varying in size and usually occurring in pairs , which corre- spond in number to the chromosomes at ...
Pagina 39
... Amer . Nat . 58 : 440-446 . 1924. - The pollen grains of a diploid ( or double diploid ) clone of hyacinth showed 4 , long V - shaped chromosomes of approximately equal size , each with a constriction at the center , 2 medium J - shaped ...
... Amer . Nat . 58 : 440-446 . 1924. - The pollen grains of a diploid ( or double diploid ) clone of hyacinth showed 4 , long V - shaped chromosomes of approximately equal size , each with a constriction at the center , 2 medium J - shaped ...
Pagina 52
... Amer . Nat . 58 : 316–321 . 1924 . -In making counted grain pollinations , a thin glass needle was swept through the ripe pollen spread thinly on a dry glass slide , the grains taken up by the needle were counted under the microscope ...
... Amer . Nat . 58 : 316–321 . 1924 . -In making counted grain pollinations , a thin glass needle was swept through the ripe pollen spread thinly on a dry glass slide , the grains taken up by the needle were counted under the microscope ...
Pagina 55
... Amer . Fruit Grower 44 : 8 , 10. Illus . 1924. - This is a sketch of the early apple in Tennessee . - Arthur S. Rhoads . 372. BATCHELOR , L. D. The present status of the walnut in California . Amer . Fruit Grower 43 : 7 , 34. Illus ...
... Amer . Fruit Grower 44 : 8 , 10. Illus . 1924. - This is a sketch of the early apple in Tennessee . - Arthur S. Rhoads . 372. BATCHELOR , L. D. The present status of the walnut in California . Amer . Fruit Grower 43 : 7 , 34. Illus ...
Pagina 56
... Amer . Forest . 29 : 723-726 . 8 fig . 1923 . 378. CHITTENDEN , F. J. New or noteworthy plants in the Society's gardens IV . Jour . Roy . Hort . Soc . 48 : 234-235 . 1923. - Brief discussions are given of Putoria calabrica , Hy- pericum ...
... Amer . Forest . 29 : 723-726 . 8 fig . 1923 . 378. CHITTENDEN , F. J. New or noteworthy plants in the Society's gardens IV . Jour . Roy . Hort . Soc . 48 : 234-235 . 1923. - Brief discussions are given of Putoria calabrica , Hy- pericum ...
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Absts acid Agric agricultural algae Amer ANONYMOUS Australia bacteria Bacterium Biol botanical Bull Caledonia cane cells characters chromatophore chromosomes citrus color Compt conidia Courtesy Japanese Jour crop cross culture Dept described diploid discussed disease distribution effect endosperm epiphytes experiments factors fertilizer flora flowers forest formation France fruit fungi fungus gametes gametophyte genera genetic genus germination given grass Grower growth hybrids hyphae increase infection inheritance intersexes Iowa Acad issue Entries leaf maize method normal notes nucleus observed organisms Phytopathology plants pollen potato Proc produced Randolph Taylor ratio relation Rend reported Rept Rhoads root Schertz seed seedlings soil South Africa South Wales South Wales 35 Sparhawk species spores starch stem stomata Sugar Jour temperature tion tissue Tôkyô trees variations varieties vegetation Western Australia wheat yield Zeitschr Ботанического
Populaire passages
Pagina 41 - The facts of population growth and the facts of agricultural economics pointed to the definite conclusion that the world confronts the fulfilment of the Malthusian prediction here and now.
Pagina 175 - Effectiveness of Vocational Education in Agriculture. A Study of the Value of Vocational Instruction in Agriculture in Secondary Schools as Indicated by the Occupational Distribution of Former Students.
Pagina 175 - ... that the vocational instruction in the high school will function to improve farming through the agricultural college graduate or other college men who farm. 2. The vocational classes in agriculture in the States of New York and Pennsylvania are sending from ten to twenty times as large a proportion of their students directly into farming as do the academic high schools.
Pagina 170 - ... former may learn something of the final destination and use of his crop, and at the same time may know what rivals he has in other countries; while the latter may understand the conditions under which his raw material is produced, and be able to estimate the prospects of the future supply...
Pagina 286 - Is there normally a cross transfer of foods, water, and mineral nutrients in woody plants?
Pagina 442 - The reducing sugars showed very little increase and the amount present at different periods of the day was very similar to total sugars. The non-reducing sugars increased markedly during the day and decreased during the night. All the constituents excepting reducing sugars are statistically significant for different intervals of sampling. On the other hand, there was a gradual increase in starch content from early morning till evening, which could...
Pagina 352 - Endamoeba gingivalis (Gros) Brumpt compared with that of E. dysenteriae with special reference to the determination of the amoebas in bone marrow in arthritis deformans of Ely's second type.
Pagina 579 - The physiology of pollen. IV. Chemotropism; effects on growth of grouping grains; formation and function of callose plugs; summary and conclusions. Amer. Jour. Bot. 11: 417-436.
Pagina 175 - With 54 per cent farming, 5 per cent in related occupations, 8 per cent in agricultural college, and 9 per cent unaccounted for, we have a possible 76 per cent for the high figure in the above estimate. On the other hand, 67 per cent might be justified for the low figure, but the writer prefers to...
Pagina 49 - ... have developed simply as byproducts of the plant's metabolism ; that at most they are of only incidental and minor service to insects in finding flowers, and that they have not been developed by any action of natural selection.