Fruit tree crop

Question

Peach and plum trees were an excellent crop last year. This year- nothing?
Other than weather, what happened?

Answer 1

Environmental causes, pollination issues, pests, disease and poor nutrient levels.
Improper pruning can also effect fruit crop.

https://www.gardeningknowhow.com/edible/fruits/peach/tree-with-no-peaches.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm