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Dedicated production of energy crops on agricultural land is expected to be a crucial source of biomass to be exploited in order to achieve the renewable energy targets in the European Union. Vegetable oils are the main source for the production of biofuel; therefore, an alternative is to use oils from non-food oilseed crops. Oilseed crops examples include rapeseed, crambe and camelina. Most oilseed crops are considered minor crops and have received much less research attention in numerous areas, including agronomy, development of weed management strategies and determination of environmental benefits and production challenges. The use of these crops may be positive when all the benefits to the cropping system (mainly in terms of soil coverage and inhibition of weeds emergence) are considered. The strongly competitive cultivars and appropriate fertilisation are strategies used to develop appropriate integrated weed management systems. However, currently, there are few data on evaluation of oilseed competition with weed community in a semiarid climate. We conducted one study aimed at assessing the weed community in five oilseed crops: three rapeseed species (Brassica carinata A. Braun., Brassica juncea L. and Brassica nigra L.), crambe (Crambe abyssinica Hochst. ex R.E. Fries) and Camelina sativa (L.) Crantz. Seed yields, yield components and plant height of each oil seed species were recorded. We evaluate these species in two irrigation levels (fully irrigated and without irrigation) and three nitrogen fertiliser doses: 0, 75 and 150 kg N ha-1.

The Competitive Ability of Weed Community with Selected Crucifer Oilseed Crops