Editing Fruit tree pollination (section)

===Cherries===
Pie cherries, also called sour cherries, are self-fertile. In some varieties, fruit yield could increased by utilizing pollinators.<ref>{{Cite journal|last1=Biddinger|first1=D. J.|last2=Joshi|first2=N. K.|last3=Rajotte|first3=E. G.|last4=Halbrendt|first4=N. O.|last5=Pulig|first5=C.|last6=Naithani|first6=K. J.|last7=Vaughan|first7=M.|date=2013-08-01|title=An immunomarking method to determine the foraging patterns of Osmia cornifrons and resulting fruit set in a cherry orchard|journal=Apidologie|volume=44|issue=6|pages=738–749|doi=10.1007/s13592-013-0221-x|issn=0044-8435|url=https://hal.archives-ouvertes.fr/hal-01201342/file/13592_2013_Article_221.pdf}}</ref>  Most sweet cherries need a second variety for pollination, and even self-fertile varies have improved fruit-set with a second variety. Pie cherries can pollinate sweet cherries. Cherries do not need thinning.