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A horizon A.I. abiotic abiotic disease ablation ablation till abney level absolute map accuracy absolute stand density absorptivity abundance acaricide accelerated annual cut accelerated erosion accelerator acceptance test accessibility accessory species acclimation acclimatization accounting variable accreditation accretion accuracy ACE ACEC acid equivalent acid precipitation acid rain acid soil acquired character acre-foot acre-inch actinorhizal plant action threshold actionable fire activator active ingredient activity activity fuel activity plan activity schedule actual use ad valorem tax adaptation adaptive management additive additive gene additive gene action additive genetic variation additivity address matching adelgid adiabatic gradient adjacency restriction adjuvant administratively withdrawn area adsorption complex adult adult phase advance felling advance regeneration advanced very high resolution radiometer advection adventitious adverse land use advocacy planning aecia aeciospore aecium aecium plural aecia aerenchyma parenchyma aerial fuel aerial ignition device aerial logging aerial photo coverage aerial photograph (oblique) aerial photograph (vertical) aerial reconnaissance aerial seeding aerial torch aerobic aerobiology aeroplankton aerosol afforestation afromontane forest aftermath afterripening age age class age-class distribution age-class period aggradation aggregate emphasis aggregated retention aggregation aging agroforestry agrosilviculture agrosilvopastoralism agrostology AHP AI AID air attack air base air coordinator air drainage air layering air tanker air temperature inversion airborne GPS airborne imaging spectrometer airshed AIS alate albedo albic horizon albinism algorithm alidade alignment chart alkaline soil alkaloid all-aged stand all-terrain vehicle allele allelopathy alley cropping alliance allocation allochthonous allochthonous flora allogenic allomone allopatric allopolyploid allowable burned area allowable cut allowable cut effect allowable defect allowable sale quantity allowable use alluvial soil alluvium alpha diversity alternate host alternative host alternative rate of return alterne AM/FM ambrosia beetle amensalism ament American National Standards Institute American Standard Code for Information Interchange ammonification amortization AMS AM|FM anabatic wind anadromous fish anaerobic analog map analysis area analysis of covariance analysis of the management situation analysis of variance analysis unit analytic hierarchy process analytical watershed anchor point ANCOVA andic andr- andro- anemophily aneroid barometer aneuploid Angiospermae angle count method angle of attachment animal damage animal month animal unit animal-unit conversion factor animal-unit equivalent animal-unit month anion exchange capacity annosum root disease annotation annual flood annual ring ANOVA anoxic ANSI antagonism antecedent precipitation index antecedent soil moisture antenna anther anthesis anthracnose anthropic epipedon anthropogenic antibiotic apatite aphid aphytal apical dominance apical meristem apogamy apomixis apoplast apospory apothecium apparent lignin application appraisal apterous aquic aquifer aquitard arbor arboretum arboriculture arborist arbuscle arc arc-node topology arch archegonium arching architecture archive ARD area area command area ignition area kill area of critical environmental concern area regulation area|volume regulation argillic horizon aridic arithmetic mean arithmetic(al) mean diameter arithmetical mean diameter Armillaria root disease army worm artesian articulated artificial intelligence artificial regeneration ASCII ascocarp ascospore ascus asexual reproduction aspect ASQ assembly assessment assignment problem associated species association assortative mating assortment table assumption at the base at the stump atmospheric pressure attack time attenuation attractant attribute attribute sampling ATV AU AUE auguring standard AUM autecology autochthonous autocorrelation autoecious autogenic automated mapping and facilities management automated resource data autopolyploid autotrophic auxin available fuel available nutrients available water average yarding distance AVHRR axenic axil axis azimuth azimuth circle azonal soil azygospore

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