Abstract:
Rapeseed crop has a very important role in world economy, being the third largest source of vegetable oil after palm
and soybeans. It is very sensitive to soil compaction, because root growth, water and nutrient absorption are achieved
with difficulty. The seedbed preparation ensures the lumps shredding, weed control, land leveling, introduction of
fertilizers in soil and, essentially, creating a layer of loose soil, favorable for seed germination. The last tillage done
before sowing has direct effects on the quality and quantity of the yield. The tillage activities by their nature must
modify soil properties towards biological plant requirements without damaging its physical condition. The qualitative
indices determined for the seedbed preparation are average depth of soil mobilization (Da), soil crumbling degree (Dsc),
soil loosening degree (Dsl), soil leveling degree (Dls) and weed control degree (Dwc). The paper present the effect of soil
tillage on seedbed qualitative indices for the rapeseed crop. The experiments were carried out at the Research and
Development Agricultural Station, Secuieni, Neamt County, between 2012 and 2014. The results show that different
tillage systems influenced the quality of the seedbed, with higher values for the conventional Plough+Combigerm
variant and lower for the minimum tillage one, Disc+Vibromix.
