The invention relates to the analysis of field characteristics to help determine prescriptions for crop input levels. A non-conductive enclosure houses a mapping system. The enclosure has a rectangular base and four walls extending from the base. A removable cover is received by the four walls. A foam interior receives at least one conductivity sensor. A port receives at least one electrical connection from an agricultural equipment in order to interface with the mapping system. A mounting assembly may mount the non-conductive enclosure to the agricultural equipment.