Soil phosphorus spatial variability due to landform, tillage, and input management: A case study of small watersheds in southwestern Manitoba
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- 作者：Henry F. Wilson ; henry.wilson@agr.gc.ca" class="auth_mail" title="E-mail the corresponding author ; Sanjayan Satchithanantham ; Alan P. Moulin ; Aaron J. Glenn
- 关键词：Soil phosphorus ; Spatial variability ; Landform ; Organic ; No till ; Fertility
- 刊名：Geoderma
- 出版年：2016
- 出版时间：15 October 2016
- 年：2016
- 卷：280
- 期：Complete
- 页码：14-21
- 全文大小：605 K
文摘
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Topographic Wetness Index is positively correlated with extractable phosphorus.
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Landform better predicts extractable P (Olsen P) in low input and no tillage systems.
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Extractable P (Olsen P) is higher in low lying areas for a range of managements.
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Organic without manure and no till fields exhibit lower extractable P (Olsen P).
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System specific recommendations for variable rate P management are needed.