Printer FriendlyPrintable version     Email this pageEmail this page
 
Search
 
 
  Advanced Search
 
Products & Services
  Products & Services Home
  Educational Resources
  Outreach Activities
  National Agricultural Library
  Archives
  Publications
  Manuscripts (TEKTRAN)
  Software
  Datasets
  Freedom of Information Act
 
 
  Display category headings
Products & Services
Services >
TEKTRAN
The ARS Manuscripts Database
Search What is TEKTRAN Browse The Latest
Biological changes in Soils
item SOIL QUALITY AND WATER INTAKE IN CONVENTIONAL-TILL VS. NO-TILL PAIRED FARMS IN WASHINGTONS PALOUSE REGION (Nov 2007)
item EDGE OF FIELD NITRATE LOSS AND OXYGEN-18 DYNAMICS IN A DRYLAND AGRICULTURE SETTING (Nov 2004)
item CARBON AND MICROBIAL COMMUNITY CHANGES IN SOIL AGGREGATES WITH NO-TILL DRYLAND WHEAT FARMING (Nov 2004)
item USING ENZYMES TO LINK SOIL STRUCTURE AND MICROBIAL COMMUNITY FUNCTION IN A PRAIRIE CHRONOSEQUENCE (Oct 2004)
item EDGE OF FIELD NITRATE LOSS AND OXYGEN-18 DYNAMICS IN A DRYLAND AGRICULTURE SETTING (Sep 2004)
item USING ENZYMES TO LINK SOIL STRUCTURE AND MICROBIAL COMMUNITY FUNCTION IN A PRAIRIE CHRONOSEQUENCE (Sep 2004)
item 14C CYCLING IN LIGNOCELLULOSE-AMENDED SOILS: PREDICTING LONG-TERM C FATE FROM SHORT-TERM METRICS (Sep 2004)
item SOIL QUALITY: A REVIEW OF THE SCIENCE AND EXPERIENCES IN THE USA (Sep 2004)
item THE FORM OF NITROGEN STORED AND TRANSPORTED TO THE RI T-DNA CARROT ROOT BY THE EXTRADICAL HYPHAE OF AM FUNGI (Aug 2004)
item BIDIRECTIONAL TRANSFER OF CARBON AND NITROGEN BETWEEN FUNGUS AND HOST IN THE ARBUSCULAR MYCORRHIZAL SYMBIOSIS (Aug 2004)
item IMPLEMENT AND SOIL CONDITION EFFECTS ON TILLAGE-INDUCED EROSION (Aug 2004)
item SOIL QUALITY AS AN INDICATOR OF SUSTAINABLE TILLAGE PRACTICES (Aug 2004)
item QUANTIFICATION OF TILLAGE AND LANDSCAPE EFFECTS ON SOIL CARBON IN SMALL IOWA WATERSHEDS (Aug 2004)
item WATERSHED-SCALE ASSESSMENT OF SOIL QUALITY IN THE LOESS HILLS OF SOUTHWEST IOWA (Aug 2004)
item IMPLEMENTING THE SMAF FOR ENVIRONMENTAL QUALITY POLICY: WATER QUALITY IMPLICATIONS IN IOWA (Jul 2004)
item ROOT MORPHOLOGY AND DRY YIELDS OF SUGARCANE DUE TO WATER TABLE DEPTH (Jul 2004)
item ELEVATED ATMOSPHERIC CO2 IN AGROECOSYSTEMS: RESIDUE DECOMPOSITION IN THE FIELD (Jul 2004)
item A HYDRAULIC CORING SYSTEM FOR SOIL-ROOT STUDIES (Jul 2004)
item ORGANIC MATTER OXIDATION POTENTIAL DETERMINATION IN A PERIODICALLY FLOODED HISTOSOL UNDER SUGARCANE (Jul 2004)
item IN SITU DYNAMICS OF PHOSPHORUS IN THE RHIZOSPHERE SOLUTION OF FIVE SPECIES (Jul 2004)
item NATURAL OXIDANT DEMAND ON VARIOUS MODIFIED FENTON¿S REAGENTS (Jun 2004)
item HEDGEROW PRUNING EFFECTS ON ALLEY CROPPED MAIZE: LIGHT INTERCEPTION, WATER RELATIONS, AND YIELD (Jun 2004)
item FREE-AIR CARBON DIOXIDE ENRICHMENT OF SOYBEAN: INFLUENCE OF CROP VARIETY ON RESIDUE DECOMPOSITION (Jun 2004)
item WATER TABLE EFFECTS ON SUGARCANE ROOT AND SHOOT DEVELOPMENT (Jun 2004)
item THE EFFECT OF ROTATION, TILLAGE, AND FERTILITY ON RICE GRAIN YIELDS AND NUTRIENT FLOWS (Jun 2004)
item ELEVATED ATMOSPHERIC CO2 IN AGROECOSYSTEMS: SOIL PHYSICAL PROPERTIES (Jun 2004)
item ECONOMICALLY OPTIMAL NITROGEN FERTILIZATION FOR YIELD AND PROTEIN IN HARD RED SPRING WHEAT (Jun 2004)
item IMPACTS OF COMPOSTED SWINE MANURE ON WEED AND CORN NUTRIENT UPTAKE, GROWTH, AND SEED PRODUCTION (May 2004)
item INFLUENCE OF ELEVATED CO2, NITROGEN, AND PINUS ELLIOTTII GENOTYPES ON PERFORMANCE OF RED-HEADED PINE SAWFLY, NEODIPRION LECONTEI (May 2004)
item IMPACT OF CROP RESIDUE REMOVAL ON FUTURE PRODUCTIVITY AND SOIL QUALITY (May 2004)
item ESTIMATION OF POTENTIAL ETHANOL YIELD FROM CORN STOVER PRODUCED USING DIFFERENT CROP MANAGEMENT STRATEGIES (May 2004)
item EFFECT OF IMPLEMENT ON SOIL CO2 EFFLUX: FALL VS SPRING TILLAGE (May 2004)
item CARBON AND NUTRIENT FLOW THROUGH MULTIPLE TROPHIC LEVELS IN A CO2-ENRICHED SOUTHERN PINE FOREST COMMUNITY (Apr 2004)
item NON-DESTRUCTIVE SOIL CARBON ANALYZER (ND-SCA) (Apr 2004)
item SOIL QUALITY CHANGES WITH NO-TILL MANAGEMENT ADOPTION FOR WIND EROSION CONTROL (Apr 2004)
item LEAVES AND THE EFFECTS OF ELEVATED CARBON DIOXIDE LEVELS (Mar 2004)
item ORGANIC SOYBEAN PRODUCTION: CHALLENGES AND PERSPECTIVES OF AN INCREASING TREND (Mar 2004)
item POSITIONAL AVAILABILITY OF PHOSPHORUS FROM SURFACE FERTILIZER BANDS (Mar 2004)
item SOIL CARBON ASSESSMENT ACROSS A NATIVE PRAIRIE RESTORATION CHRONONSEQUENCE (Mar 2004)
item DEVELOPMENT AND USE OF THE SOIL MANAGEMENT ASSESSMENT FRAMEWORK (Mar 2004)
item SOIL BIOLOGY: THE RHIZOSPHERE (Mar 2004)
item SOIL AND CROP MANAGEMENT EFFECTS ON SOIL BIOLOGY (Mar 2004)
item SOIL BIOTA IN THE RHIZOSPHERE (Mar 2004)
item PROFITABILITY OF ORGANIC CROPPING SYSTEMS IN SOUTHWESTERN MINNESOTA (Mar 2004)
item TILLAGE AND ROTATION INTERACTIONS FOR CORN AND SOYBEAN GRAIN YIELD AS AFFECTED BY PRECIPITATION AND AIR TEMPERATURE (Mar 2004)
item RAIN-FED MAIZE-SOYBEAN ROTATIONS OF NORTH AMERICA (Feb 2004)
item STARTER COMPOSITION AND HYBRID SELECTION AFFECT EARLY GROWTH AND YIELD OF CORN (Feb 2004)
item LINKING MICROBIAL-SCALE FINDINGS TO FARM-SCALE OUTCOMES (Feb 2004)
item CROP AND SOIL PRODUCTIVITY RESPONSE TO CORN RESIDUE REMOVAL: A LITERATURE REVIEW (Feb 2004)
item SOIL QUALITY, FERTILITY, AND HEALTH - HISTORICAL CONTEXT, STATUS, AND PERSPECTIVES (Jan 2004)
item OXIDATION POTENTIALS OF SOIL ORGANIC MATTER IN HISTOSOLS UNDER DIFFERENT TILLAGE METHODS (Jan 2004)
item SOIL QUALITY AND SOIL LIFE (Jan 2004)
item EVALUATING STARTER FERTILIZER PLACEMENT OPTIONS FOR CORN (Dec 2003)
item CARBON AND NUTRIENT FLOW THROUGH MULTIPLE TROPHIC LEVELS IN A CO2-ENRICHED SOUTHERN PINE FOREST COMMUNITY (Dec 2003)
item EFFECTS OF ELEVATED CO2 ON SOYBEAN AND SORGHUM: RESIDUE DECOMPOSITION IN THE FIELD (Nov 2003)
item SOIL - HEALTH RELATIONSHIPS: SOIL MICROBIOLOGY (Nov 2003)
item SOIL QUALITY, EVALUATING YOUR ENTIRE SOIL SYSTEM (Nov 2003)
item SOIL - HEALTH RELATIONSHIPS PEOPLE, PLANTS AND ANIMALS (Nov 2003)
item SOIL QUALITY AND WATER INFILTRATION IN CONVENTIONAL VS. NO-TILL PAIRED FARMS IN WASHINGTON'S PALOUSE REGION (Nov 2003)
item COMPARISION OF ORGANIC AND CONVENTIONAL CROPS IN A LONG-TERM AGROECOLOGICAL RESEARCH (LTAR) SITE: YIELDS, SOIL QUALITY AND ECONOMICS IN YEARS 1-6 (Nov 2003)
item APPLICATIONS AND IMPLICATIONS OF THE SOIL MANAGEMENT ASSESSMENT FRAMEWORK (Nov 2003)
item ORGANIC CORN PRODUCTION, ORGANIC MATTER MANAGEMENT, AND ROOT HEALTH (Nov 2003)
item RECREATING NATURAL RIPARIAN BUFFERS IN AGROECOSYSTEMS (Nov 2003)
item RECOMMENDED METHODS OF MANURE ANALYSIS (Nov 2003)
item EFFICIENT USE OF NUTRIENTS - ARE WE IGNORING THE HIDDEN HALF OF THE CROP? (Nov 2003)
item PREDICTING PHOSPHORUS LOSS IN RUNOFF USING A DISPLACEMENT TECHNIQUE (Nov 2003)
item GROWTH AND PHOSPHORUS ACCUMULATION OF BROMEGRASS FOLLOWING PHOSPHONATE APPLICATION (Nov 2003)
item LAND-USE PRACTICE IMPACTS ON STREAM BANK EROSION WITH AN EMPHASIS ON GRAZING PRACTICES (Nov 2003)
item EARLY GROWTH AND NUTRIENT UPTAKE OF TRANSGENIC AND NON-TRANSGENIC CORN HYBRIDS (Nov 2003)
item SOIL QUALITY INDICATOR RESPONSE TO CORN STALK GRAZING (Nov 2003)
item SOIL FERTILITY PARADIGMS -- CATION RATIO AND SUFFICIENCY -- COMPARED ON-FARM AND ON-STATION (Nov 2003)
item EFFECTS OF ELEVATED ATMOSPHERIC CO2 ON SOIL CARBON IN CONVENTIONAL AND CONSERVATION CROPPING SYSTEMS (Nov 2003)
item REGIONAL SCALE VARIATIONS OF RADIATION - USE EFFICIENCY IN RESPONSE TO THE ENVIRONMENT (Nov 2003)
item OPTIMIZING PLANTING TIME BASED ON SHAW-SIMULATED SEED-ZONE MOISTURE AND TEMPERATURE (Nov 2003)
item NUTRIENT EXPORT FROM ANNUAL MONOCULTURE AND PERENNIAL POLYCULTURE PRODUCTION SYSTEMS (Nov 2003)
item TRANSPIRATION-DRIVEN MODELS FOR CROP GROWTH SIMULATION (Nov 2003)
item CROPPING SYSTEM EFFECTS ON SOIL QUALITY IN THE GREAT PLAINS (Oct 2003)
item CHANGES IN SOIL PROPERTIES OF NO-TILL SYSTEMS DUE TO OCCASIONAL TILLAGE (Oct 2003)
item EFFECTS OF GRAZING MANAGEMENT ON SEDIMENT AND PHOSPHORUS IN RUNOFF (Oct 2003)
item IMPLICATIONS OF USING CORN STALKS AS A BIOFUEL SOURCE: A JOINT ARS AND DOE PROJECT (Oct 2003)
item CLIMATE CHANGE AND PLANT PATHOSYSTEMS - FUTURE DISEASE PREVENTION STARTS HERE (Sep 2003)
item ON-FARM PRODUCTION AND UTILIZATION OF MYCORRHIZAL FUNGUS INOCULA (Aug 2003)
item EXPLORING THE BIDIRECTIONAL TRANSFER OF CARBON AND NITROGEN BETWEEN FUNGUS AND HOST IN THE ARBUSCULAR MYCORRHIZAL SYMBIOSIS (Aug 2003)
item LOCATING THE SITE OF DNA SYNTHESIS AND MEASURING FLUX THROUGH THE PENTOSE PHOSPHATE PATHWAY IN AN ARBUSCULAR MYCORRHIZAL FUNGUS (Aug 2003)
item THE EFFECT OF ROOT EXUDATES ON SPORE GERMINATION, UPTAKE, METABOLISM AND GENE EXPRESSION OF THE ARBUSCULAR MYCORRHIZAL FUNGUS GLOMUS INTRARADICES (Aug 2003)
item THE EFFECTS OF GLUCOSE ON CARBON METABOLISM IN GLOMUS INTRARADICES DURING ARBUSCULAR MYCORRHIZAL SYMBIOSIS (Aug 2003)
item THE IDENTIFICATION AND EXPRESSION OF PUTATIVE HOMOLOGUES OF NITROGEN METABOLIC GENES IN GLOMUS INTRARADICES (Aug 2003)
item CROPPING SYSTEM EFFECTS ON SOIL QUALITY IN THE GREAT PLAINS: SUMMARY FROM A REGIONAL PROJECT (Aug 2003)
item THE EFFECTS OF ELEVATED ATMOSPHERIC CO2 AND SOIL P PLACEMENT ON COTTON ROOT DEPLOYMENT (Aug 2003)
item SOIL QUALITY -- HUMANKIND'S FOUNDATION FOR SURVIVAL (Jul 2003)
item EFFECTS OF ELEVATED ATMOSPHERIC CO2 ON BIOMASS PRODUCTION AND C SEQUESTRATION: CONVENTIONAL AND CONSERVATION CROPPING SYSTEMS (Jul 2003)
item EFFECTS OF ELEVATED ATMOSPHERIC CO2 ON BIOMASS PRODUCTION AND C SEQUESTRATION: CONVENTIONAL AND CONSERVATION CROPPING SYSTEMS (Jul 2003)
item SPATIAL AND TEMPORAL VARIATION IN ECONOMICALLY OPTIMUM N RATE (Jun 2003)
item SOIL WATER AND NITROGEN DYNAMICS IN DRYLAND CROPPING SYSTEMS OF WASHINGTON STATE, USA (Jun 2003)
item EVALUATION OF 2- AND 4-YEAR CROP ROTATIONS WITH FOUR MANAGEMENT STRATEGIES IN MINNESOTA (Jun 2003)
item NOVEL ANTIBIOTICS AS INHIBITORS FOR THE SELECTIVE RESPIRATORY INHIBITION METHOD OF MEASURING FUNGAL: BACTERIAL RATIOS IN SOIL (Jun 2003)
item RESIDUE C DYNAMICS AND C STORAGE IN SEMI-ARID NO-TILL SPRING CROP ROTATIONS (Jun 2003)
item SOIL ORGANIC MATTER DECOMPOSITION POTENTIALS IN ORGANIC SOILS UNDER DIFFERENT TILLAGE METHODS (Jun 2003)
item GROWERS' PERCEPTIONS AND ACCEPTANCE OF SOIL QUALITY INDICES (Jun 2003)
item SOIL QUALITY: WHY AND HOW? (Jun 2003)
item ROOT EXUDATE OF PMI TOMATO MUTANT M161 REDUCES AM FUNGAL PROLIFERATION IN VITRO (May 2003)
item CONTRIBUTIONS OF ARBUSCULAR MYCORRHIZAS TO SOIL BIOLOGICAL FERTILITY (May 2003)
item INOCULATION WITH MYCORRHIZAL FUNGI INREASES TEH YIELD OF GREEN PEPPERS IN A HIGH P SOIL (May 2003)
item GLOBAL CHANGE AND BELOWGROUND PROCESSES IN AGRICULTURAL SYSTEMS. (May 2003)
item CARBON AND NUTRIENT FLOW THROUGH MULTIPLE TROPHIC LEVELS IN A CO2-ENRICHED SOUTHERN PINE FOREST COMMUNITY (May 2003)
item CARBON AND NITROGEN DYNAMICS OF A CO2-ENRICHED FOREST ECOSYSTEM: IMPLICATIONS FOR AIR, WATER AND SOIL QUALITY (Apr 2003)
item SEARCHING FOR MORE EFFECTIVE CORN STARTERS IN CONSERVATION-TILLAGE SYSTEMS (Apr 2003)
item CARBON STORAGE IN CO2-ENRICHED PLANT SYSTEMS: BELOWGROUND PROCESSES (Mar 2003)
item METHODS OF DETERMINATION OF P, K, CA, MG, AND TRACE ELEMENTS (Mar 2003)
item USING APPARENT ELECTRICAL CONDUCTIVITY CLASSIFCATION AND WITHIN-FIELD VARIABILITY TO DESIGN FIELD-SCALE RESEARCH (Mar 2003)
item EFFECTIVE STARTER FERTILIZERS FOR CORN IN CONSERVATION TILLAGE SYSTEMS (Feb 2003)
item CARBON EXPORT FROM ARBUSCULAR MYCORRHIZAL ROOTS INVOLVES THE TRANSLOCATION OF CARBOYHDRATE AS WELL AS LIPID (Feb 2003)
item SITE-SPECIFIC MANAGEMENT ZONES BASED ON SOIL ELECTRICAL CONDUCTIVITY IN A SEMI-ARID CROPPING SYSTEM (Jan 2003)
item PRIMING EFFECT AND C STORAGE IN SEMI-ARID NO-TILL SPRING CROP ROTATIONS (Jan 2003)
item MICROBIOLOGICAL CHARACTERISTICS OF ERODIBLE SOILS (Dec 2002)
item ELEVATED ATMOSPHERIC CO2 INCREASES SOIL RESPIRATION IN A MODEL REGENERATING LONGLEAF PINE ECOSYSTEM (Nov 2002)
item CLIMATE CHANGE AND HERBIVORY: INTERACTIONS BETWEEN LONGLEAF PINE SAWFLY (PINUS PALUSTRIS) AND RED-HEADED PINE (NEODIPRION LECONTEI) UNDER ELEVATED ATMOSPHERIC CO2 (Nov 2002)
item GYPSUM AND COMPOST EFFECTS ON SUGARCANE ROOT GROWTH, YIELD, AND PLANT NUTRIENTS (Nov 2002)
item CROPPING SYSTEM EFFECTS ON NO3-N LOSS WITH SUBSURFACE DRAINAGE WATER (Nov 2002)
item THE NEED FOR AND ATTEMPTS AT RELATING SOIL QUALITY ASSESSMENT TO ECONOMIC RETURN (Nov 2002)
item TRANSITION CHANGES ASSOCIATED WITH IMPLEMENTING ORGANIC AGRICULTURE RESEARCH (Nov 2002)
item DOES SOIL QUALITY SHOW AN ECONOMIC BENEFIT FOR LONG-TERM CROP ROTATION? (Nov 2002)
item TURKEY LITTER AS A PHOSPHORUS SOURCE FOR CORN (Nov 2002)
item WHAT ARE THE BEST P AND K PLACEMENT OPTIONS FOR CORN (Nov 2002)
item REDUCING SOIL PHOSPHOROUS BY HAY HARVEST (Nov 2002)
item DEFINING COTTONWOOD UPTAKE OF PHOSPHORUS USING RHIZOSPHERE SOLUTION PHASE MESUREMENTS (Nov 2002)
item GRAZING MANAGEMENT SYSTEMS TO MINIMIZE PHOPHORUS LOSSES FROM UPLAND PASTURES (Nov 2002)
item LINKING SOIL QUALITY TO ECONOMICS USING MANAGEMENT PRACTICE INDICATORS (Nov 2002)
item TIMING OF APPLICATION AND COMPOSTING AFFECT ON CORN YIELD RESPONSE TO SOLID SWINE MANURE (Nov 2002)
item SHORT-TERM TILLAGE EFFECTS ON BIOLOGICALLY ACTIVE SOIL ORGANIC MATTER (Nov 2002)
item SOIL AGGREGATION DYNAMICS UNDER RIPARIAN PASTURES, FOREST, AND CROPLANDS IN NE MISSOURI (Nov 2002)
item SOIL ORGANIC MATTER OXIDATION POTENTIAL WITH FLUCTUATING WATER TABLE UNDER SUGARCANE (Nov 2002)
item A HYDRAULIC SOIL CORING SYSTEM FOR SOIL CARBON-ROOT STUDIES (Nov 2002)
item EFFECTS OF GLOBAL CHANGE ON SOUTHERN PINE FORESTS: RESPONSE OF A REGENERATING LONGLEAF PINE COMMUNITY TO ATMOSPHERIC CO2 ENRICHMENT (Nov 2002)
item RESPONSES OF SOUTHEASTERN FOREST SPECIES TO ELEVATED ATMOSPHERIC CO2: PATHOLOGY AND RELATED BIOTIC INTERACTIONS ABOVE AND BELOW THE GROUND (Nov 2002)
item SOIL ELECTRICAL CONDUCTIVITY CLASSIFICATION: A BASIS FOR SITE-SPECIFIC MANAGEMENT IN SEMIARID CROPPING SYSTEMS (Nov 2002)
item AGRONOMIC PRINCIPLES OF FERTILIZER PLACEMENT (Oct 2002)
item NITROGEN AND DRY MATTER DISTRIBUTION BY CULM AND LEAF POSITION AT TWO STAGES OF VEGETATIVE GROWTH IN WINTER WHEAT. (Sep 2002)
item LETTER TO THE EDITOR (AGRONOMY JOURNAL) (Sep 2002)
item IMPACT OF DIFFERENT GRAZING SYSTEMS AND VEGETATIVE FILTER STRIPS ON SEDIMENT AND NUTRIENT LOSSES WITH SURFACE RUNOFF (Jul 2002)
item SEWAGE SLUDGE AND SOIL SUSTAINABILITY (Jun 2002)
item SOIL QUALITY CHANGES WITH NO-TILL MANAGEMENT ADOPTION FOR WIND EROSION CONTROL (Jun 2002)
item MACROPORE TRANSPORT OF BROMIDE AS INFLUENCED BY SOIL STRUCTURE DIFFERENCES (Jun 2002)
item SOIL QUALITY OF CONSERVATION TILLAGE PRACTICES (Jun 2002)
item SOIL QUALITY IN ORGANIC AGRICULTURAL SYSTEMS (May 2002)
item KEY INDICATORS FOR ASSESSING NITROGEN USE EFFICIENCY IN CEREAL-BASED AGROECOSYSTEMS (Apr 2002)
item FINE-TUNING YOUR WRITING - A BOOK REVIEW (Apr 2002)
item FACTORS AFFECTING N AND P NEEDS IN STARTERS: FORMULATIONS AND PLACEMENT FOR REDUCED-TILLAGE CORN (Feb 2002)
item EFFECTS OF BACTERIA FROM THE GENUS PSEUDOMONAS ON THE GROWTH AND YIELD OF ALFALFA AND WINTER WHEAT (Dec 2001)
item CONSERVATION TILLAGE AND CROPPING INNOVATION: CONSTRUCTING THE NEW CULTURE OF AGRICULTURE (A BOOK REVIEW) (Dec 2001)
item DEVELOPMENT OF A MANURE TESTING MANUAL BY A MULTI-REGIONAL COMMITTEE (Oct 2001)
item LONG-TERM AGROECOLOGICAL RESEARCH (LTAR) IN IOWA: CERTIFIED ORGANIC COMPARISONS (Oct 2001)
item SOIL QUALITY RESEARCH IN THE U.S.A. (Oct 2001)
item USE OF ELECTRICAL CONDUCTIVITY TO ESTIMATE N-MINERALIZATION CONTRIBUTIONS TO CROP N AVAILABILITY (Oct 2001)
item N-MANAGEMENT AND CROP ROTATION EFFECTS ON YIELD AND RESIDUAL SOIL NITRATE LEVELS (Aug 2001)
item RESPONSES OF SOUTHEASTERN FOREST SPECIES TO ELEVATED ATMOSPHERIC CO2: PATHOLOGY AND RELATED BIOTIC INTERACTIONS ABOVE AND BELOW THE GROUND (Nov 2000)
   
ARS Home |  USDA |  Home | About Us | Research | Products & Services | People & Places  | News & Events | Partnering | Careers | Contact Us | Help |
Site Map |  Freedom of Information Act |  Statements & Disclaimers |  Employee Resources |  FirstGov |  White House