Vol. 10, Issue 12 (2021)

Author(s):
Rashmi CM, Prakash SS and Giridhar BN

Abstract:
A greenhouse experiment was conducted during 2018 at College of Agriculture V.C. Farm, Mandya using CRD design with ten treatments and three replications with an objective to study the “Effect of urea modified hydroxyapatite Nano fertilizer (UHA) on uptake of major nutrients by tomato”. Treatments includes T₁: RDF (NPK)+FYM, T₂ to T₄: NU:UHA @ 75:25, 50:50 and 25:75 per cent, respectively and T₅ to T₇: UHA @ 50, 75 and 100%, respectively, T₈ to T₉: RDF with 0.5 and 1.0 per cent foliar spray of UHA and T₁₀: Absolute control. Phosphorus, potassium and FYM are common for all treatments except T₁. The total N (5903.6 mg plant^-1), P (1571.1 mg plant^-1) and K (375.95 mg plant^-1) uptake were highest with the application of RDF (NPK) + FYM + 0.50 per cent UHA spray.