Abstract:
An experiment was conducted to identify the best urea form which allows minimum N
loss through ammonia volatilization but simultaneously ensuring good yield in the sandy and
laterite soils of Kerala. The sulphur coated urea and urea mudball deep placement recorded
minimum N loss through ammonia volatilization (2.85% and 5.29% respectively, of the applied N).
However, application of urea supergranu lei n the reduced zone recorded the maximum grain yield
and N recovery. Though the rate of ammonia volatilization was comparable between the two soils,
yield was higher in laterite soil, irrespective of the treatments.
