In some varieties that will develop into a permanent condition referred to as "biennial bearing
The performance of poorer performing trees will be increased towards that of the best and the tendency for out of sync tree-to-tree biennial bearing
The biennial bearing
tendency of each rootstock was assessed by calculating the alternate bearing index (ABI) using the formula: AM = [([a.sub.y2] - [a.sub.y1])/ ([a.sub.y2] + [a.sub.y1]) + ([a.sub.y3] - [a.sub.y2])/ ([a.sub.y3] + [a.sub.y2])...
Jim Arbury warns apple growers that their bumper crop this year might not be repeated if their trees suffer from biennial bearing
, carrying a heavy crop one year and little or none the next.
" Another solution to biennial bearing
is that after the June dropwhich usually happens in July, when fruitlets fall from the trees), you should thin the fruits, removing at least half including the crowded, diseased and deformed and leaving only the best.
Arbury warns apple growers that their bumper crop might not be repeated next year if trees suffer from biennial bearing
- carrying a heavy crop one year and little or none the next.
This improves the size and quality of those remaining and prevents biennial bearing
, where a tree is stuck in a cycle of producing masses of fruit one year and then missing the next because it's so exhausted.
The trees are biennial bearing
, which means the harvest is greater in alternate years.
It also indicates a leveling out of what agriculture wonks call a "biennial bearing
pattern" - a boom year, followed by a slack one.
On top of that, it requires a pollinator, it tends to biennial bearing
(bearing fruit every other year), and it ripens unevenly October through November, a real nightmare for the guy at the orchard in charge of picking.
The phenomenon of biennial bearing
is well documented for fruit trees and shrubs in cultivation (Harper and White, 1974 and references therein) but this is the first report of its occurrence in wild populations where the annual variation in berry production ranges across three orders of magnitude.
Tree size, yield and biennial bearing
relationship with 40 apple rootstocks and tree scion cultivars.