Pistachio Yield and Quality as Affected by Rootstock

Abstract

Abstract Trunk cross-sectional area of ‘Kerman’ pistachio trees on Pistacia atlantica Desf. seedling rootstocks varied widely after 24 years. Average annual nut yield was positively related to trunk cross-sectional area. Degree of shell splitting and blank nut production also were influenced by rootstock. Two trees were identified that were the most vigorous, had the greatest yields, and produced excellent crops annually in contrast to the others that exhibited severe biennial bearing.