High density planting was first established in which fruit tree? (RJ ACF Ranger 2021)

✅Explanation: High-density planting (HDP) in apple orchards revolutionized apple production, allowing for increased yields per unit area, earlier fruit-bearing, and efficient management practices. The concept of HDP was pioneered with apple trees and later adopted for other fruit crops. This technique was first established in apple in Europe during the sixties and now the majority of the apple orchards in Europe, America, Australia, and New Zealand are grown under this system. This system reduced labour costs and improves fruit quality.