Studies on physical properties of soils in relation to fruit tree growth

II Soil atmosphere and tree growth. (6). Growth of Satsuma orange, Trifoliate orange and peach seedlings and grape cuttings as influenced by various concentrations of oxygen in the soil atmosphere

Abstract

1. Data presented, which are conducted by the continuous aerating system, show effect of soil oxygen concentration in the soil atmosphere upon the growth of Satsuma orange, Trifoliate orange and peach seedlings and grape cuttings.
2. The growth of Satsuma orange, Trifoliate orange and grape was vigorous in low oxygen level and shoot growth of Satsuma and Trifoliate oranges, which was normal in about 4% or more oxygen, was interrupted by about 1% oxygen concentration. Grapes which made normal growth in 7% oxygen died in about 0.5% oxygen as Trifoliate orange. Satsuma orange did not die during the experimental procedure. The shoot growth of peach seedlings used for check was decreased in about 6% oxygen and died in little less than 2% oxygen.
3. Results of experiments of last 6 years on oxygen relation to the growth of the young seedlings of common fruit trees and stock plants are classified as follows.
I Good growth group for low oxygen concentration: persimmon (D. Lotus LINN.), Satsuma orange, Trifoliate orange, grape.
II Intermediate growth group for low oxygen concentration : apple, Japanese pear.
III Weak growth group for low oxygen concentration: peach.