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_ I _ _ I I _ _III _IIII 1942 Total Rye 8-year period amount of nitrate begunI calcium and magnesium calcium carbonate control tank cover crops cover not turned cowpeas were grown Crop and method crop removedI crops of rye dissolved carbonates Dunmore silt loam entire crop removed_ fallow conditionI ﬁrst Hagerstown I I III I I IIII III_ IIII IIII I I IIIII _ IIIIIIIIIII IIIl IlII IlIII incorporation 1935 investigation investigationI lysimeter magnesium carbonate method of incorporation methods of treatment nitrate nitrogen organic matter outgo of nitrate outgo of potassium PctI PctI PctI periodI plant nutrients pounds of nitrate pounds of soil pounds per acre rainfall removedI _ _ Rye and cowpeas Rye and lespedeza silt loam soil soil as inﬂuenced soil leaving soil___ soilI sulphur tanksI treated tanks Treatments Pounds winter cover yearI