Arvidsson, Johan
- Department of Soil and Environment, Swedish University of Agricultural Sciences
Abstract
Soil compaction effects, persisting after ploughing, was investigated in totally 21 long-term field experiments in Sweden. Emphasis was laid on crop yield, but soil physical properties (dry bulk density, porosity, water retention curve, saturated hydraulic conductivity, air permeability, seedbed properties, aggregate size distribution and tensile strength of aggregates), nutrient uptake and plant establishment was also determined. The experiments had two treatments in common: one control treatment with no extra traffic, and one treatment where the soil was compacted by traffic with a tractor and trailer in the autumn prior to ploughing, with an intensity of 350 Mgkm/ha (the weight of the machinery, multiplied by the distance driven per hectare). During the rest of the year, the experiment was conventionally tilled, and in the same way for the different treatments. The compaction was repeated each autumn for about 10 years, and the yield was determined each year and about five years after the termination of the experimental traffic. The individual experiments also included other treatments, i.e. different traffic intensities, ground pressures, soil moisture contents when applying extra traffic and compaction of the subsoil as well as the topsoil. The compaction affected the soil structure on clay soils. There was a lower amount of fine aggregates in the seedbed in the compacted treatments, which also led to a lower soil moisture content in the seedbed. Compaction decreased the porosity and the proportion of big pores
Keywords
jordbearbetning; strukturskador; packning; avkastning; såbädd; växtnäringsupptag; fältförsök; plantetablering
Published in
Rapporter från Jordbearbetningsavdelningen, Sveriges lantbruksuniversitet
1994, number: 85
Publisher: Institutionen för markvetenskap, Jordbearbetningsavdelningen, Sveriges lantbruksuniversitet
SLU Authors
UKÄ Subject classification
Agricultural Science
Permanent link to this page (URI)
https://res.slu.se/id/publ/30283