Individual study: Hydraulic conductivity, residue cover and soil surface roughness under different tillage systems in semiarid conditions
Lampurlanés J. & Cantero-Martínez C. (2006) Hydraulic conductivity, residue cover and soil surface roughness under different tillage systems in semiarid conditions. Soil and Tillage Research, 85, 13-26
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Water: Use no tillage in arable fields
A replicated, randomized, controlled study in 1992–1997 in a rainfed barley field in the Ebro river valley, Spain, found lower porosity in soils with no tillage, compared to subsoil tillage. Water availability: Lower porosity was found in soils with no tillage, compared to subsoil tillage, in some comparisons (e.g., in subplots with continuous cropping, in one of two years: 5.0 vs 15.5 cm/day, hydraulic conductivity). Methods: No tillage or subsoil tillage was used on four plots each (each with 10 m x 6 m subplots, with continuous cropping or fallow). A cultivator and a subsoil plough were used for subsoil tillage (15–40 cm depth), in October. Herbicide was used for no tillage, in October. Crop residues were removed from all plots. Hydraulic conductivity was measured in July 1996 and August 1997 (tension infiltrometer, 250 mm diameter, seven tensions from 0 to 20 cm water, in subplots with continuous cropping).