Duckett Truffieres are leading Canadian trufficulture – truffle trees inoculated with certified Black Perigord, harvest of Canada’s first truffles on Vancouver Island, BC, Canada in 2007 and CKC registered breeder of top quality Lagotto Romagnolo truffle dogs.
— Read on ducketttruffieres.com/

Yikes

Apple trees require attention each year to maintain the best fruit production. Yearly pruning and fertilizing help the tree focus its nutrient supply on producing a manageable number of flavorful fruits without blemishes. Apple trees use most nutrients moderately, but they’re heavy users of potassium and calcium. …
— Read on homeguides.sfgate.com/kind-fertilizer-use-apple-trees-49268.html