pp. 156 illusts #0220
abscission acid acre acreage amount annual applied areas Ascolano bearing become bloom branches brine calcium California California olive cause cells changes chemical color concentration containing cost cover crop cultivars cuttings damage deficiency depends determine early effective ethylene excessive fertilizer field Figure flowers fruit grafted green growers growing growth hand harvest heavy important increase infected irrigation late leaf leaves less levels light limited loss Manzanillo mature method Mission moisture natural needed nematode nitrogen nutrients occurs olive oil olive trees operation orchard percent period pitted plant problem production pruning reduced removed ripe root rootstock salinity salt sample scale season Sevillano shoots soil solution spacing species spray spring surface temperature thinning tion treated treatment usually Valley variety weeds winter yield