01028naa a2200157 a 450000100080000000500110000800800410001910000200006024500400008026000090012052006430012970000180077270000150079070000190080577300460082416494442000-08-29       1971    bl ---       0--  u    #d1 aLUXMOORE, R. J.  aGas space porosity of citrus roots.  c1971  aThe vol of gas spaces per unit root vol (porosity) was measured for 4 citrus rootstock cultivars grown in sand culture for 100 days under greenhouse conditions. Rough lemon (Citrus jambhiri Lush.) had a porosity of 7.2% which was significantly less than sweet orange (Citrus sinensis L. Osbeck) at 10.9% and `Troyer` citrange (Poncitrus trifoliata L. Raf. X C. sinesis) at 9.4%. Trifoliate orange (P. trifoliata) had a mean porosity of 9.8% with more variability than the other cultivars. `Troier` citrage roots sampled from grown in solution culture had a porosity of 13.2% and this is significantly than for roots grown in sand culture.1 aSTOLZY, L. H.1 aJOSEPH, H.1 aDEWOLFE, T. A.  tHort. Sciencegv.6, n.5, p.447-448, 1971.