Further subprograms are currently under development, including for the promotion of
nitrification inhibitors used in combination with organic fertilizers (manure).
In a greenhouse study,
the nitrification inhibitor encapsulated calcium carbide (a slow - release source of acetylene) was added with 75, 150, and 225 mg of 75 atom % 15N urea - N to flooded pots containing 18 - day - old rice (Oryza sativa L.) plants.