This document discusses rootstocks and grafting techniques in fruit crops. It describes the steps in grafting including production of callus, restoration of vascular transport, and healing. Rootstocks can be seedling or clonal, with clonal having advantages of uniformity but seedling being more economical. Common grafting techniques are described like whip grafting, tongue grafting, cleft grafting, and side grafting. Budding techniques include T-budding, patch budding, chip budding, and ring budding. Rootstocks are important for characteristics like disease resistance, dwarfing, and growth habits they impart on the scion cultivar.