1. Using Field and Model Data to Improve Sustainable Management of Carbon, Nitrogen, Phosphorus, and Sulfur in Agroecosystems of Central Pennsylvania Restricted (Penn State Only) Author: Sanders, Zachary Title: Using Field and Model Data to Improve Sustainable Management of Carbon, Nitrogen, Phosphorus, and Sulfur in Agroecosystems of Central Pennsylvania Graduate Program: Soil Science (PHD) Keywords: precision agriculturevariable rate fertilizersoil carbonsoil organic matterecosystem modelingsoil nitrogensulfurphosphoruscornsoybeans File: Login to Download Committee Members: John Spargo, Major Field MemberCibin Raj, Outside Unit & Field MemberCharlie White, Chair & Dissertation AdvisorArmen Kemanian, Major Field Member & Dissertation AdvisorBradley Cardinale, Program Head/Chair