Gypsum And Alfalfa
What is gypsum composed of? Is it detrimental to land in future years?
Have the lands of California any black alkali in them? I notice my
neighbors who sow gypsum on their alfalfa get a very much better yield
of hay than those who do not.
Gypsum is sulphate of lime. It is not detrimental to the land in after
years except that its action is to render immediately available other
plant foods and this may render the land poorer - not by the addition of
anything that is injurious but by the quicker using up of plant food
which it already contains. Black alkali is very common in California in
alkali lands. In lands which show their quality by good cropping, there
is no reason to apprehend black alkali nor to use gypsum to prevent its
occurrence. The use of gypsum does stimulate the growth of alfalfa and
makes its product greater just as you observe in the experience of your
neighbors, but the more they use up the land now the less they will have
later, unless they resort to regular fertilization to restore what has
been exhausted. But even that may be a good business proposition.
Next: What Gypsum Does
Previous: Gypsum On Grain Land