Analysis of the spatial variability of production attributes in sweet corn

A manual site-directed survey of yield, cob dimensions and plant densities is undertaken across three sweet corn (Zea mays var. rugosa) production fields in Bathurst, New South Wales, Australia, to assess if the spatial variation in production is sufficient to warrant further investment in site-specific studies. The 113 data points are assessed using non-spatial and spatial analysis and the data interpolated and mapped. Non-spatial analysis shows a large magnitude in all variables, particularly yield, which ranges from 6 to 30 Mg ha-1. Spatial analysis shows that all variables have moderate to strong spatial response and the resultant maps show strong spatial patterns that may be conducive to differential management strategies. The observed variation is similar to the variation reported in maize (Zea mays) where site-specific management has been successfully adopted.