info:oai:icrisat:3559info:ofi/fmt:xml:xsd:journalWaniS PWani, S PMcGillW BMcGill, W BHaugen-KozyraK LHaugen-Kozyra, K LJumaN GJuma, N G1918-184167-74Increased proportion of active soil N in Breton loam under cropping systems with forages and green manures741Canadian Journal of Soil Science1994article