Occasional Paper 15: Biogas fuel from a closed-loop nitrogen supply cropping system

OP15: Biogas fuel from a closed-loop nitrogen supply cropping system (July 2013) - This paper is a November 2012 report to the Ministry for Primary Industries with the results of 3 years of research into a Closed-Loop Nitrogen (CLN) bioenergy cropping system to provide rural New Zealand with a substantial supply of biofuel. This CLN system uses crops that are anaerobically digested to produce methane for use as fuel, with the nutrients returned to the field where the crop was grown, thereby closing the loop. Sustainable biofuel crops will be grown on marginal land, such as ‘summer dry’ land, rather than land well suited to high-value food production. Biogas crops were selected under these conditions to achieve good yields with low agronomic inputs.

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