Straw management
(a) Most of the total uptake of K
and Si is contained in the straw.
for this reason, straw
management is of great
significance in rice nutrition.
(b) When threshing takes place in
the field, straw is left behind in
heaps. (c) Some of the K
returned to the soil beneath the fire
spots is lost by leaching, and no
straw K is returned to most of the
soil surface. Nutrients may also be
removed from the field when straw
is fed to cattle but this depends on
how cattle manure is managed