Kathie Zipp

It’s a long road to developing disease-resistant rootstocks, but USDA-ARS research at the University of California, Davis is providing a great start for walnuts.

Crossbreeding almond rootstocks with those of other stone fruit can make trees more resilient in boron-rich soils.

A study by the University of California found that applying nitrogen to a well-managed, productive orchard after harvest did not improve almond yield the next year.