On 11/12/02 8:21 PM, in article
, "Danielle Davis"
wrote:

How many years can you plant the same crop in the same spot before all
the nutrients are gone from the soil.


You should be able to plant the same crop indefinitely as long as the
nutrients are replaced each year by fertilizer and other crop nutrients.
I've seen corn planted in the same fields for 20+ years. This is in the
central U.S.
Crop diseases and pests tend to get in those fields and cut the yields
unless the crop is sprayed. There is one corn disease that can be only
prevented by crop rotation. The name of it escapes me right now. Seed corn
companies in my area will not plant their seed corn in fields that had corn
the previous year.
There would be a dramatic yield drop for corn if it wasn't fertilized each
year with nitrogen fertilizer. The rough rule of thumb is one pound of
nitrogen for each bushel of corn.

Dean





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