Pruning

Effect of canopy management on walnut quality

The link below contains a time lapse video showing the yearly growth of both pruned (left - yellow trunk) and unpruned (right - blue trunk) 'Chandler' walnut trees.

Photos were taken from an ongoing prunning trial in Colusa County.

Walnut Timelapse

Measuring pistachio tree height

Effect of pruning and crop load on canopy development

Publications

Lampinen, Bruce, John Edstrom, Samuel Metcalf, William L. Stewart, Claudia Negrón and Loreto Contador. 2015. Howard walnut trees can be brought into bearing without annual pruning. California Agriculture, April-June online Vol. 69:2 (http://californiaagriculture.ucanr.org/landingpage.cfm?article=ca.E.v069n02p123&fulltext=yes) .

Negron, Claudia, Loreto Contador, Bruce D. Lampinen, Samuel G. Metcalf, Yann Guedon, Evelyne Costes, and Theodore M. DeJong. 2014. How different pruning severities alter shoot structure: a modelling approach in young ‘Nonpareil’ almond trees. Functional Plant Biology 42: 325-335.

Walnut harvest in San Joaquin County