Summary and Conclusions
Poultry litter application method greatly
affected the volatilization of NH3
-N from
this conservation tillage system. When compared
to conventional surface spreading of
poultry litter, NH3
volatilization decreased
an average of 67% when the litter application
was lightly disked into the soil surface
and decreased an average of 88% when the
litter was applied below the soil surface using
the Subsurfer prototype. These reductions
in NH3
volatilization were achieved while
retaining average ground cover of 82%, consistent
with conservation tillage needs, so
further development of the Subsurfer technol