Applying the right amount of N is not easy because walnuts take a lot, but these days you don't want to apply too much.NITROGEN MANAGEMENT is a hot-button issue lately. We know that when orchards are supplied with more nitrogen (N) than they can use,that N can be lost from the root zone and leached into groundwater aquifers. Walnuts, like other nut crops, require relatively high amounts of nitrogen to get a good crop. But just how much N do walnuts need? And when?
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