. Annals of applied biology. Biology, Economic; Biochemistry. Norman Cunlipfb 107 The flies appeared to frequent the ears, in largest numbers, during calm weather, hence the material was collected about 4 , when generally the wind has least velocity. The sweepings were made with a 12 ins. diameter net, similar to. Fig. 1. Field of 41 acres in which sweeping was conducted showing crops carried in 1919-20. Relative areas to scale. Spring oats in 1919 variety " Abundance," in 1920 '"; Dates of drilling are prefixed. A. 2. 5. 19 Spring oats. 10. 3. 20 B. 28. 3. 19
. Annals of applied biology. Biology, Economic; Biochemistry. Norman Cunlipfb 107 The flies appeared to frequent the ears, in largest numbers, during calm weather, hence the material was collected about 4 , when generally the wind has least velocity. The sweepings were made with a 12 ins. diameter net, similar to. Fig. 1. Field of 41 acres in which sweeping was conducted showing crops carried in 1919-20. Relative areas to scale. Spring oats in 1919 variety " Abundance," in 1920 '"; Dates of drilling are prefixed. A. 2. 5. 19 Spring oats. 10. 3. 20 B. 28. 3. 19 Spring oats. 10. 3. 20 C. 31. 3. 19 Spring oats. 15. 5. 19 Rye grass and clover. D. 30. 10. 18 Winter oats. 11. 10. 19 Winter oats. H, 1919 Roots. 1920 Winter wheat. 20. 5. 20 Rye grass and clover. 1919 Roots. 4. 3. 20 Spring oats. 15. 11. 18 Winter oats. 1920 Roots. Lucerne and grass. a marine towing-net, the terminal glass tube greatly facilitating the killing and transference of the material collected. Fifty semi-circular sweeps were made, as far as possible of equal value, over the tops of the oat plants, working up the centre of plot and keeping to the same line on each occasion. When weather conditions permitted, collections were. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Association of Applied Biologists; Association of Economic Biologists. [Wellesbourne, Warwick, etc. ] Association of Applied Biologists [etc. ]
Size: 1265px × 1975px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbiochem, bookyear1921
