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Old December 15, 2014   #3
PNW_D
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Join Date: Jan 2006
Location: West Coast, Canada
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I have a copy of "Manual of Organic Materials" from Organic Gardening 1947 - it suggests, and I quote:

"Despite the relatively high calcium content of most leaves, calcium must be added to leaf compost in order to balance the acidity and produce a neutral reaction for garden vegetables and the majority of the flowering annuals."
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