. Day length and crop yields. Plants; Crop yields; Plant photoperiodism. its production. Foi ex- ample, \ ery excellent yields ill sugar-beel seed are now being produced in certain areas of the Pacific Xorth- Wes\ where the 1 cm | x â i;i- tures are sufficiently mild to permit overwintering and the longer summer photo- periods are especially favor- able. As a result of these recent developments the United States now produces enough sugar-beet seed for its own use. Onions also show a range in sensitivity and adjust- ment to photoperiod, not only in flowering but par- ticularly in bulh produc- t
. Day length and crop yields. Plants; Crop yields; Plant photoperiodism. its production. Foi ex- ample, \ ery excellent yields ill sugar-beel seed are now being produced in certain areas of the Pacific Xorth- Wes\ where the 1 cm | x â i;i- tures are sufficiently mild to permit overwintering and the longer summer photo- periods are especially favor- able. As a result of these recent developments the United States now produces enough sugar-beet seed for its own use. Onions also show a range in sensitivity and adjust- ment to photoperiod, not only in flowering but par- ticularly in bulh produc- tion. Failure of certain varieties to produce mar- ketable bulbs in one locality and their successful produc- tion in another often resull from their relative degrees of adjustment to the photo- periods prevailing in such localities while grov. th and bulbing should be taking place. Because of this fact attention must be given to l he determination and selec- tion of localities u here the Largest crops can be mosl economically and success- fully produced. in the case of other types of plants, testing the varieties under experimental conditions w ill give exact information on their probable success or failure with respect to the. Many varieties of potato generally fail to ma- ture the berrylike seed balls but do so when the photoperiod is sufficiently long. 13. 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 Parker, M. W. (Marion Wesley), 1907-; Borthwick, H. A. (Harry Alfred), 1898-. Washington, D. C. : U. S. Dept. of Agriculture
Size: 970px × 2577px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublisherwashingtondcusd, booksubjectplants
