Thirteen years after cultivating native grassland and establishing continuous wheat (Triticum aestivum L.) and wheat–fallow rotations in southern Alberta, surface soil total N levels were 15% lower, and nitrate (60–90 cm) concentrations were 2.5- and 17-fold greater, than native grassland. Wheat–fallow, even without fertilization, markedly enhanced potential nitrate loss through the root zone.
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9 December 2016
Soil organic carbon, nitrogen, and phosphorus 13 yr after abruptly disturbing Northern Great Plains grassland
Ben W. Thomas,
Xiying Hao,
Walter D. Willms
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Canadian Journal of Soil Science
Vol. 97 • No. 2
June 2017
Vol. 97 • No. 2
June 2017
abandoned
assolement blé–jachère
changement de vocation des terres
cultivated
défrichage
friches
land-use change