Infrastructure-mounted RFID-readable tags or transponders are provided for various applications. Such infrastructure tags may be employed in combination with RFID-readable product tags and an RFID reader for an improved inventory-management system which requires both types of tags to be scanned to constitute a successful product count. Infrastructure tags may also be employed as “read” or “no-read” tags in an RFID read field. The infrastructure tags of the RFID read field are combined with an RFID reader which is dynamically adaptable during initial set-up and use to improve the performance of the read field. When a perturbing object is detected in the read field, one or more performance parameters of the reader are adjusted to overcome any perturbing influence caused by the object.