Bi and Scagel 2007 Nitrogen foliar feeding has advantages.
Discusses nitrogen needs of plants throughout the year and how to provide for them by foliar feeding. G Bi and C Scagel Nursery Management & Production Mar:43-46 (2007).
Bi and Scagel 2007. Applying Foliar nutrients NMPRO.pdf — PDF document, 882 kB (903220 bytes)