2409.13a, Contents Page 1 of 2 FSH 2409.13a - TIMBER PERMANENT PLOT HANDBOOK WO AMENDMENT 2409.13a-92-1 EFFECTIVE 1/29/92 UNITED STATES DEPARTMENT OF AGRICULTURE FOREST SERVICE FSH 2409.13a TIMBER PERMANENT PLOT HANDBOOK Contents ZERO CODE CHAPTER 10 PERMANENT PLOT PLANNING AND INSTALLATION 20 CORE INFORMATION 30 DATA HANDLING AND MAINTENANCE