Soil & tillage research vol:19 issue:2-3 pages:297-306
The effect of the application of 50, 100 and 200 t ha-1 of pig slurry on soil penetration resistance, and sealing of the soil surface as a result of rainfall, was studied for a sandy loam soil in the field and under laboratory conditions, respectively. In the field, after slurry application and ploughing, a somewhat higher penetration resistance in the ploughed layer was noticed on the plots that had been fertilized with the liquid pig manure. In the laboratory, a superficial application of the pig manure resulted, after simulated rainfall, in lower penetration resistance of the soil surface. However, mixing the slurry with the soil gave a higher penetration resistance. Additionally, the emergence of sugar beet seeds and the oxygen diffusion rate in the soil under laboratory conditions was monitored. The emergence of the sugar beet seeds was much slower in the soil that received pig manure, but final emergence was similar in all treatments. The oxygen diffusion rate showed no difference at all among treatments. An application of 200 t ha-1 pig slurry increased the soil salinity from 1 to 6 mS cm-1.