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The root distribution studies were carried out on sixteen-year-old guava cultivar Allahabad Safeda in the Department of Horticulture, Allahabad Agricultural Institute-Deemed University, Allahabad during the year 2001–02. The experiment was conducted in factorial randomized block design with three replications involving two factors, viz. radial distance and depth. Most of the feeder roots were present at 0–60 cm radial distance and 0–20 cm depth. The maximum dry weight of active roots was observed at 0–20 cm depth from the soil surface which significantly decreased with increased depth. The interaction between radial distances and soil depths in all types of roots were found to be significant. Thus, fertilizers and irrigation water may be applied in this zone for better utilization of these inputs by the tree roots.
