Agriculture Ecosystems & Environment · 2012 · 23 citations · 18 references
AgricultureAgronomySoil SciencesDryland AgricultureSoil FertilitySoil ScienceAgricultural SystemsAgroecosystem StabilityAgroecosystem StructureDryland AgroecologyDryland Cropping SystemsTillage SystemsAgroecological Cropping SystemsAgroecosystem Nutrient ExportBiosolids AmendmentNo-till AgricultureNo-till Cropping Systems
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Methods of soil analysis. Part 3 - chemical methods.
Donald L. Sparks, A. L. Page, Philip A. Helmke et al. · 1996 · 8.6K citations