摘要:

Values for the ascorbic acid content in the tubers of nine potato varieties have been compared. The effects of different fertilizers have been studied. Location of plots throughout the province was considered. Changes in ascorbic acid content due to tuber maturity and storage time have been measured at regular intervals. The relative amounts of ascorbic acid in the stem and eye ends of tubers have been found. Effects of top-killers on the ascorbic acid content of tubers were noted. No relationship was observed between the ascorbic acid content and either variety or fertilizer. The highest values for ascorbic acid were obtained in August. Losses during maturity and storage were continuous and fairly regular. Top-killers produced no apparent effect on the ascorbic acid content of tubers. The eye end of the potato tuber contained approximately 20% more ascorbic acid than the stem end.

ISSN:1923-4287    

DOI:10.1139/cjr48c-027

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

A method of obtaining daily values of the potential evaporating power of the atmosphere was used for the first time in Canada in 1947. The results verify Thornthwaite's formula for computing potential evapotranspiration in southern Ontario. The correlation between average runoff and computed water surplus for several watersheds in Ontario and Quebec is presented on a map.

ISSN:1923-4287    

DOI:10.1139/cjr48c-028

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

not available

ISSN:1923-4287    

DOI:10.1139/cjr48c-029

出版商:NRC Research Press    

年代:1948

数据来源: NRC