Will Your Soil Be Responsive
to Gypsum?
(Aldrich and Schoonover, 1951)
Yes if:
(a) soil pH is over about 8.2 and maybe
even if it is less
(b) ESP is over 3 and definitely if it is over 9
(c) Water puddles on it
(d) the soil particles slake or disperse
when added to water
(e) the subsoil pH is lower than 5, (of) there is waterlogging
in the soil
(f) there is crust on the soil after a rain
or irrigation
(g) there is excessive cracking of the soil
after rain or irrigation
(h) irrigation water contains substantial
amounts of bicarbonate (however, be aware of caliche forming
in the subsoil)
(i) Intense rain falls on soil that is
not acidic and where all solutes may be leached from the soil
surface
(j) No-till is used
This review paper is updated from Wallace (1994).
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