Controlling ammonia volatilization from urea surface applied to sugar beet on a calcareous soil

The extent of ammonia (NH3) volatilization from surface‐applied urea to sugar beet and effects of NBPT [N‐(n‐butyl) thiophosphoric triamide] PG (phosphogypsum), PR (by‐product‐pyrite) and KCl (potassium chloride) on NH3 volatilization, nitrogen (N) content of leaf blades and petioles, sugar, amine N, and refined sugar contents, and root and refined sugar yields were determined in the field. Total NH3 loss varied from 7.0% to 23.6% depending on...