Article: Nitrate accumulation under cropping in the Ferrosols of Far North Queensland wet tropics.(Statistical Data Included)

Introduction

Recent fertiliser N mass-balance studies for the major cropping systems (sugarcane, banana, and pasture) in the wet-tropical Johnstone River Catchment (JRC) of Far North Queensland (FNQ) showed that 30-50% of the fertiliser N applied to Ferrosols leached below the crop root-zone ([is less than] 0.75 m) as nitrate (Moody et al. 1996; Prove and Moody 1997). The results also indicated an imbalance between the applied and recovered N, indicating the fate of the applied N was not fully accounted for. The amount of nitrate leaching below the crop root-zone may depend on the quantity and quality of the N fertiliser used, time and frequency of application, ...

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