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Keywords: crown height
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Journal Articles
Journal:
World Journal of Engineering
World Journal of Engineering (2014) 11 (1): 71–76.
Published: 01 March 2014
...Yongchao Liu; Baoguo Ma In the hedgerow orchard of hilly land, the crown height changes with ground slope so as to meet the condition of the sun light. Using astronomical trigonometric formulas, this paper calculates solar position of the 40° north latitude in vernal equinox and autumnal equinox...
