1. Development and validation of a critical source area index tool to identify areas vulnerable to phosphorus loss Open Access Author: Lesher, Emily Title: Development and validation of a critical source area index tool to identify areas vulnerable to phosphorus loss Graduate Program: Soil Science Keywords: Phosphorusnutrient managementcritical source areashydrological source areasphosphorus index File: Download Lesher_Thesis_Draft_Oct_15.pdf Committee Members: Bradley Cardinale, Program Head/ChairPatrick Joseph Drohan, Thesis Advisor/Co-AdvisorPeter J A Kleinman, Committee MemberJohn Thomas Spargo, Committee MemberIan Thomas, Special Signatory