(a) genetics of the seed or plant. |
(b) thin fruit
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(c) soil and water management
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(d) length of day and length of season
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(e) weather (temperature, sunlight)
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(f) carbon dioxide enrichment
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(g) girdling
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(i) hormones
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(j) chemicals and fertilizers
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(k) pollenation
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(l) fungus in soil
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(m) prolong the harvest season
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(n) multiple plant succession
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