The Morrinsville site Typic Orthic Granular Soil is

If incubated at 14 °C (the average recharge temperature), most samples would yield total 15N fluxes of < 1 nmol g− 1 h− 1. After 24 h, the jars were re-opened, sufficient degassed DI water was added to make a slurry with a soil:water ratio of 1:3 and then treatment amendments were performed. All jars received an N amendment at a rate of 10 μg N g− 1 dry soil using 15N-enriched KNO3 (49 atom%).