Botanical Abstracts, Volume 14Williams & Wilkins, 1925 |
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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.