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Wani, S P and McGill, W B and Robertson, J A (1991) Soil N dynamics and yield of barley grown on breton loam using N from biological fixation or fertilizer. Biology and Fertility of Soils, 12 (1). pp. 10-18. ISSN 0178-2762
Wani, S P and McGill, W B and Haugen-Kozyra, K L and Robertson, J A and Thurston, J J (1994) Improved soil quality and barley yields with fababeans, manure, forages and crop rotation on a Gray Luvisol. Canadian Journal of Soil Science, 74 (1). pp. 75-84. ISSN 0008-4271
Wani, S P and McGill, W B and Haugen-Kozyra, K L and Juma, N G (1994) Increased proportion of active soil N in Breton loam under cropping systems with forages and green manures. Canadian Journal of Soil Science, 74 (1). pp. 67-74. ISSN 1918-1841