Carrer, M. R. 1992. characterizing the soil physical condition in reduced tillage systems for winter wtreat'on a flrne sandy fou-"ti"f t-atl coiei. Can kia tension for macropore volume, air permeability at low air pressure (0'25 kPa), oxygen diffusion rate (ODR) at 0.65 mV, and shear strength indicaied that the soil physical condition was within the opti*u-range for root growth, over the 6-to 240-mm depth, in eachrillage system' In addition' relative compaction *us .uintaing; at a low level in all systems. The quotient of air permeability and. mac-,opo." n'olu-", as an index of pore continuity, indiCated that the relatively large macropore.volumes under mouldboard ploughing were less efficient in conducting air than the macropores under direct J.iffing. ihese diffbren|.i l'n po.. continuity were most prevalent at the lower soil depth' For personal use only.
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