g. Nitrification inhibitor:
1) 2-chloro-6-(trichloromethyl) pyridine—Use pure TCMP or
commercial preparations*.
2) Allylthiourea (ATU) solution—Dissolve 2.0 g allylthiourea
(C4H8N2S) in about 500 mL water and dilute to 1 L. Store
at 4°C. The solution is stable for not more than 2 weeks.