Providing evidence to improve practice

Individual study: A lysimeter study of nitrate leaching from grazed grassland as affected by a nitrification inhibitor, dicyandiamide, and relationships with ammonia oxidizing bacteria and archaea

Published source details

Di H. J., Cameron K. C., Shen J. P., He J. Z. & Winefield C. S. (2009) A lysimeter study of nitrate leaching from grazed grassland as affected by a nitrification inhibitor, dicyandiamide, and relationships with ammonia oxidizing bacteria and archaea. Soil Use and Management, 25, 454-461


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Amend the soil with formulated chemical compounds Soil Fertility

A replicated study in 2009 on loam, silt-loam and sandy loam soils in South Island, New Zealand (Di et al. 2009) found that adding the nitrification inhibitor dicyandiamide reduced nitrate loss by an average of 59% across different soil types and contrasting rainfall conditions. Soils in Canterbury, West Coast and Southland regions were fertilized with cow urine at a rate of 1,000 kg N/ha. Dicyandiamide was applied to half the soils at 10 kg/ha following urine application, and under two rainfall conditions (1,100 and 2,200 mm/year). There were four replicates of each treatment and soils were sampled in large (0.5 x 0.7 m), undisturbed sections.