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    Start Over You searched for: Format Journal article Remove constraint Format: Journal article Publication Year 2001 Remove constraint Publication Year: 2001 Subject Term soil Remove constraint Subject Term: soil

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    1. Evolution of an agricultural innovation: the N-Trak soil nitrogen test - adopt and discontinue, or reject?

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    2. Sequential adoption of site-specific technologies and its implications for nitrogen productivity: a double selectivity model

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    3. Uses of soil and water protection practices among farmers in three Midwest watersheds

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