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- Author:
- P. B. DeLaune; P. Mubvumba; K. L. Lewis; J. W. Keeling
- Source:
- Soil Science Society of America journal 2019 v.83 no.5 pp. 1451-1458
- ISSN:
- 0361-5995
- Subject:
- biogeochemical cycles; bulk density; conventional tillage; cotton; cover crops; cropping systems; growing season; nitrate nitrogen; no-tillage; resistance to penetration; rye; semiarid zones; soil compaction; soil function; soil organic carbon; soil properties; water conservation; High Plains (United States); Texas
- Abstract:
- ... Core Ideas Soil nitrate was lower due to a cereal rye cover crop during the active growing season. Infiltration was greater for no‐till with rye cover crop than conventional tillage. After 17 years, no‐till with rye had greater soil organic C than conventional tillage in surface layers. Soil organic C did not differ between no‐till with rye and conventional tillage for subsurface layers. No‐till w ...
- DOI:
- 10.2136/sssaj2019.03.0069
- https://doi.org/10.2136/sssaj2019.03.0069
- Author:
- Verónica Acosta-Martínez; Lumarie Pérez-Guzmán; Jane M.F. Johnson
- Source:
- Applied soil ecology 2019 v.142 pp. 72-80
- ISSN:
- 0929-1393
- Subject:
- Conservation Reserve Program; acetates; acid phosphatase; agroecosystems; air drying; arylsulfatase; beta-N-acetylhexosaminidase; beta-glucosidase; bioavailability; biogeochemical cycles; buffers; cotton; enzyme activity; grasses; nutrients; p-nitrophenol; pH; soil; soil organic carbon; soil quality; total nitrogen; Minnesota; Texas
- Abstract:
- ... Four enzymes activities (EAs) have been targeted as soil health indicators for their important role in reactions releasing bioavailable nutrients within C (β-glucosidase), N and C (β-glucosaminidase), P (acid phosphomonoesterase) and S (arylsulfatase) cycling. Traditionally these EAs are assayed independently on air-dried soil by measuring the release of p-nitrophenol from a substrate analog. Prev ...
- DOI:
- 10.1016/j.apsoil.2019.05.001
- https://doi.org/10.1016/j.apsoil.2019.05.001
- Author:
- Joshua L. Grace; Veronica Acosta-Martínez; Sandra Rideout-Hanzak; Randy Stanko; Alfonso Ortega-S.; David B. Wester
- Source:
- Applied soil ecology 2019 v.138 pp. 37-46
- ISSN:
- 0929-1393
- Subject:
- Heteropogon contortus; biogeochemical cycles; community structure; ecosystems; energy; fatty acid methyl esters; grasses; habitat destruction; invasive species; microbial carbon; microbial communities; nitrogen; plant communities; rangelands; sand; saprophytes; semiarid zones; soil; soil microorganisms; wildlife habitats; Texas
- Abstract:
- ... Invasive plants are a serious concern throughout many rangelands in North America because of their detrimental effects on vegetation community composition, diversity and wildlife habitat. Growing evidence shows that invasive plants affect ecosystem processes such as energy and nutrient cycling and soil microbial associations. Tanglehead (Heteropogon contortus [L.] P. Beauv. ex Roem and Schult.) is ...
- DOI:
- 10.1016/j.apsoil.2019.02.012
- https://doi.org/10.1016/j.apsoil.2019.02.012
- Author:
- Jeffery A. Watson; M. Bayani Cardenas; Stephen B. Ferencz; Peter S.K. Knappett; Bethany T. Neilson
- Source:
- Hydrological processes 2018 v.32 no.9 pp. 1267-1281
- ISSN:
- 0885-6087
- Subject:
- aquifers; biogeochemical cycles; chemical reactions; floods; groundwater; groundwater flow; heat; hosts; hyporheic zone; niches; river water; rivers; topography; water quality; water table; water temperature; Colorado River; Texas
- Abstract:
- ... The transition area between rivers and their adjacent riparian aquifers, which may comprise the hyporheic zone, hosts important biochemical reactions, which control water quality. The rates of these reactions and metabolic processes are temperature dependent. Yet the thermal dynamics of riparian aquifers, especially during flooding and dynamic groundwater flow conditions, has seldom been studied. ...
- DOI:
- 10.1002/hyp.11504
- https://doi.org/10.1002/hyp.11504
- Author:
- J. A. Goolsby; N. K. Singh; D. B. Thomas; A. Ortega-S; D. G. Hewitt; T. A. Campbell; A. Perez de Leon
- Source:
- Southwestern entomologist 2017 v.42 no.2 pp. 339-346
- ISSN:
- 0147-1724
- Subject:
- Canthon; Cochliomyia hominivorax; Nicrophorus; adults; aeration; animal health; attractants; biogeochemical cycles; biological control; dung beetles; feces; habitat fragmentation; oils; parasites; pest control; pesticide application; rangelands; soil; volatile fatty acids; Texas
- Abstract:
- ... Dung beetles (Coleoptera: Scarabaeidae) play a major role in nutrient cycling, soil aeration, and biological control of pests and parasites that breed in manure. Habitat fragmentation, pesticide usage, and conventional agricultural practices threaten dung beetle diversity, and their conservation is of growing concern. This study from August to October 2016 on the East Foundation, Santa Rosa Ranch, ...
- DOI:
- 10.3958/059.042.0203
- https://doi.org/10.3958/059.042.0203
- Author:
- Wendy Marie Robertson; J. K. Böhlke; John M. Sharp Jr
- Source:
- Hydrological processes 2017 v.31 no.13 pp. 2349-2364
- ISSN:
- 0885-6087
- Subject:
- anthropogenic activities; arid lands; arid zones; basins; biogeochemical cycles; climate change; ecosystems; evapotranspiration; groundwater; groundwater recharge; irrigation; land use change; monitoring; nitrates; nitrogen; nitrogen fertilizers; simulation models; solutes; vegetation; wells; Texas
- Abstract:
- ... Quantifying the effects of anthropogenic processes on groundwater in arid regions can be complicated by thick unsaturated zones with long transit times. Human activities can alter water and nutrient fluxes, but their impact on groundwater is not always clear. This study of basins in the Trans‐Pecos region of Texas links anthropogenic land use and vegetation change with alterations to unsaturated z ...
- DOI:
- 10.1002/hyp.11178
- https://doi.org/10.1002/hyp.11178
- Author:
- Lisa M. Fultz; Jennifer Moore-Kucera; Josefine Dathe; Marko Davinic; Gad Perry; David Wester; Dylan W. Schwilk; Sandra Rideout-Hanzak
- Source:
- Applied soil ecology 2016 v.99 pp. 118-128
- ISSN:
- 0929-1393
- Subject:
- Actinobacteria; Gram-negative bacteria; Gram-positive bacteria; Juniperus; Pinus; Quercus; biogeochemical cycles; botanical composition; carbon; carbon dioxide; case studies; community structure; ecosystems; enzyme activity; fatty acid methyl esters; fire severity; forests; fungi; grassland fires; grasslands; land restoration; microbial biomass; microbial communities; mountains; nitrification; nitrogen; nitrogen content; nutrients; plant growth; prediction; prescribed burning; semiarid zones; soil microorganisms; soil nutrients; soil organic matter; soil pH; soil sampling; soil water; temperature; trees; water content; Texas
- Abstract:
- ... Fire is a natural disturbance that shapes many ecosystems. In semi-arid regions, where high temperatures and low soil moisture limit nutrient cycling and plant growth, fire is critical to supply nutrients and drive vegetation composition. We examined soil chemical and biological properties to assess the short-term impacts of wildfire and prescribed fires on soil functioning in semi-arid regions of ...
- DOI:
- 10.1016/j.apsoil.2015.10.023
- https://doi.org/10.1016/j.apsoil.2015.10.023
- Author:
- Brandi Kiel Reese; Angela D. Witmer; Stacey Moller; John W. Morse; Heath J. Mills
- Source:
- Biogeochemistry 2014 v.118 no.1-3 pp. 307-319
- ISSN:
- 0168-2563
- Subject:
- biogeochemical cycles; carbon; correlation; estuaries; marine environment; sediments; sulfide minerals; sulfides; sulfur; Texas
- Abstract:
- ... Abiotic and secondary biotic reactions can contribute to the formation of cryptic biogeochemical cycles, resulting in an underestimation of carbon and nutrient budgets. This Texas coastal estuary sediment study provided a unique opportunity to use multidisciplinary RNA-based molecular and geochemical approaches to identify cryptic cycles associated with sulfate reduction, a commonly measured bioge ...
- DOI:
- 10.1007/s10533-013-9933-2
- https://doi.org/10.1007/s10533-013-9933-2
- Author:
- V. Acosta-Martínez; J. Cotton; T. Gardner; J. Moore-Kucera; J. Zak; D. Wester; S. Cox
- Source:
- Applied soil ecology 2014 v.84 pp. 69-82
- ISSN:
- 0929-1393
- Subject:
- Chloroflexi; Dothideomycetes; Sordariomycetes; Streptomyces parvisporogenes; Syntrophobacter; Verrucomicrobia; agricultural soils; agroecosystems; arid lands; arylsulfatase; biogeochemical cycles; biogeography; climate change; climatic factors; community structure; correspondence analysis; drought; enzyme activity; fungi; genes; heat; internal transcribed spacers; microbial communities; ribosomal RNA; sandy loam soils; sequence analysis; soil bacteria; soil management; temperature; transcription (genetics); Texas
- Abstract:
- ... Identification of microbial assemblages predominant under natural extreme climatic events will aid in our understanding of the resilience and resistance of microbial communities to climate change. From November 2010 to August 2011, the Southern High Plains (SHP) of Texas, USA, received only 39.6mm of precipitation (vs. the historical average of 373mm) and experienced the three hottest months (June ...
- DOI:
- 10.1016/j.apsoil.2014.06.005
- https://doi.org/10.1016/j.apsoil.2014.06.005
- Author:
- V. Acosta-Martinez; J. Moore-Kucera; J. Cotton; T. Gardner; D. Wester
- Source:
- Applied soil ecology 2014 v.75 pp. 43-51
- ISSN:
- 0929-1393
- Subject:
- acid phosphatase; agroecosystems; alkaline phosphatase; alpha-galactosidase; arylsulfatase; asparaginase; beta-glucosidase; biogeochemical cycles; climate change; cotton; drought; enzyme activity; heat; millets; organic matter; sandy loam soils; soil enzymes; soil management; soil quality; summer; urease; Texas
- Abstract:
- ... Extreme droughts and heat waves due to climate change may have permanent consequences on soil quality and functioning in agroecosystems. During November 2010 to August 2011, the Southern High Plains (SHP) region of Texas, U.S., a large cotton producing area, received only 39.6mm of precipitation (vs. the historical avg. of 373mm) and experienced the hottest summer since record keeping began in 191 ...
- DOI:
- 10.1016/j.apsoil.2013.10.008
- https://doi.org/10.1016/j.apsoil.2013.10.008
- Author:
- Nicholas Spada; Ayse Bozlaker; Shankararaman Chellam
- Source:
- Analytica chimica acta 2012 v.735 no. pp. 1-8
- ISSN:
- 0003-2670
- Subject:
- anthropogenic activities; antimony; arsenic; barium; biogeochemical cycles; cadmium; copper; elemental composition; emissions; lead; molybdenum; platinum; roads; spectroscopy; tin; tracer techniques; urban areas; vehicles (equipment); weathering; zinc; Texas
- Abstract:
- ... Platinum group elements (PGEs) including Rh, Pd, and Pt are important tracers for vehicular emissions, though their measurement is often challenging and difficult to replicate in environmental campaigns. These challenges arise from sample preparation steps required for PGE quantitation, which often cause severe isobaric interferences and spectral overlaps from polyatomic species of other anthropog ...
- DOI:
- 10.1016/j.aca.2012.05.026
- https://doi.org/10.1016/j.aca.2012.05.026
- Author:
- Edith Bai; Thomas W. Boutton; Feng Liu; X. Ben Wu; C. Thomas Hallmark; Steven R. Archer
- Source:
- Soil biology & biochemistry 2012 v.44 no.1 pp. 102-112
- ISSN:
- 0038-0717
- Subject:
- soil organic carbon; islands; trees; C3 plants; roots; particle size distribution; grasslands; biogeochemical cycles; texture; tree and stand measurements; woodlands; ecosystems; highlands; soil sampling; soil texture; lowlands; biomass; shrubs; landscapes; subtropical soils; Texas
- Abstract:
- ... Spatial patterns of soil δ¹³C were quantified in a subtropical C₃ woodland in the Rio Grande Plains of southern Texas, USA that developed during the past 100 yrs on a lowland site that was once C₄ grassland. A 50 × 30 m plot and two transects were established, and soil cores (0–15 cm, n = 207) were collected, spatially referenced, and analyzed for δ¹³C, soil organic carbon (SOC), and soil particle ...
- DOI:
- 10.1016/j.soilbio.2011.09.013
- https://doi.org/10.1016/j.soilbio.2011.09.013
- Author:
- Pound, Katrina L.; Nowlin, Weston H.; Huffman, David G.; Bonner, Timothy H.
- Source:
- Environmental biology of fishes 2011 v.90 no.3 pp. 277-285
- ISSN:
- 0378-1909
- Subject:
- Hypostomus; biogeochemical cycles; catfish; digestive system; fish eggs; food webs; herbivores; macroinvertebrates; macrophytes; rivers; stable isotopes; streams; Texas
- Abstract:
- ... Introduced suckermouth catfishes (Family Loricariidae) are now established in a number of spring-influenced streams in North America but their impacts on native biota are not well documented. Purposes of this study were to quantify gut contents of the loricariid Hypostomus plecostomus from the San Marcos River in central Texas and to evaluate the role of H. plecostomus in the San Marcos River food ...
- DOI:
- 10.1007/s10641-010-9741-7
- https://doi.org/10.1007/s10641-010-9741-7
- Author:
- Acosta-Martínez, V.; Bell, C.W.; Morris, B.E.L.; Zak, J.; Allen, V.G.
- Source:
- Agriculture, ecosystems & environment 2010 v.137 no.3-4 pp. 231-240
- ISSN:
- 0167-8809
- Subject:
- integrated agricultural systems; soil organic carbon; beef cattle; fiber crops; biogeochemical cycles; soil chemical properties; livestock production; pastures; Gossypium hirsutum; steers; soil microorganisms; crop production; warm season grasses; forage grasses; species diversity; grazing management; crop rotation; cotton; forage crops; semiarid zones; soil enzymes; cropping sequence; Texas
- Abstract:
- ... Water availability is a primary limiting factor facing agricultural systems in most semi-arid regions across the world. This study is part of a larger long-term project to develop and evaluate integrated crop and livestock systems in order to reduce dependence on underground water sources by optimizing cotton (Gossypium hirsutum) production in the Texas High Plains of U.S. Selected microbial, chem ...
- Handle:
- 10113/42892
- DOI:
- 10.1016/j.agee.2010.02.008
- https://doi.org/10.1016/j.agee.2010.02.008
- Author:
- Biederman, Lori A.; Boutton, Thomas W.
- Source:
- Applied soil ecology 2010 v.46 no.2 pp. 168-176
- ISSN:
- 0929-1393
- Subject:
- subtropics; edge effects; soil depth; predators; grasslands; biogeochemical cycles; soil ecology; dry matter accumulation; savannas; soil fertility; ecological invasion; population structure; soil nematodes; plant parasitic nematodes; woody plants; spatial variation; population size; biodiversity; root systems; ecological succession; Texas
- Abstract:
- ... Woody plant encroachment into grasslands generally increases spatial heterogeneity of soil properties and processes and creates “islands of fertility” beneath woody canopies. However, little is known regarding the potential for these changes to influence spatial variation in soil fauna. We quantified population sizes, biodiversity, and trophic structure of soil nematode communities in a savanna pa ...
- DOI:
- 10.1016/j.apsoil.2010.08.014
- https://doi.org/10.1016/j.apsoil.2010.08.014
- Author:
- Zeng, Hongcheng; Chambers, Jeffrey Q.; Negrón-Juárez, Robinson I.; Hurtt, George C.; Baker, David B.; Powell, Mark D.
- Source:
- Proceedings of the National Academy of Sciences of the United States of America 2009 v.106 no.19 pp. 7888-7892
- ISSN:
- 0027-8424
- Subject:
- hurricanes; wind; forest trees; tree mortality; longitudinal studies; carbon; biogeochemical cycles; carbon dioxide; forest damage; Southeastern United States; Texas
- Abstract:
- ... Tropical cyclones cause extensive tree mortality and damage to forested ecosystems. A number of patterns in tropical cyclone frequency and intensity have been identified. There exist, however, few studies on the dynamic impacts of historical tropical cyclones at a continental scale. Here, we synthesized field measurements, satellite image analyses, and empirical models to evaluate forest and carbo ...
- DOI:
- 10.1073/pnas.0808914106
- PubMed:
- 19416842
- PubMed Central:
- PMC2683102
- https://doi.org/10.1073/pnas.0808914106
- Author:
- Allen, V.G.; Brown, C.P.; Segarra, E.; Green, C.J.; Wheeler, T.A.; Acosta-Martinez, V.; Zobeck, T.M.
- Source:
- Agriculture, ecosystems & environment 2008 v.124 no.1-2 pp. 3-12
- ISSN:
- 0167-8809
- Subject:
- integrated agricultural systems; soil organic carbon; grazing; grasslands; sustainable agriculture; biogeochemical cycles; pastures; Gossypium hirsutum; irrigation; plant pests; soil microorganisms; soil fertility; cattle; water management; aquifers; irrigated farming; nitrogen fertilizers; cotton; forage crops; cropping systems; soil erosion; Texas
- Abstract:
- ... Crop production on the Llano Estacado of the Texas High Plains has used precipitation and supplemental irrigation with water pumped from the Ogallala aquifer at rates that have far exceeded recharge for many years. Over 20% of the U.S. cotton (Gossypium hirsutum L.) crop is produced currently in this once vast grassland. Most of this cotton is produced in monoculture systems that are economically ...
- Handle:
- 10113/16651
- DOI:
- 10.1016/j.agee.2007.08.006
- https://doi.org/10.1016/j.agee.2007.08.006
- Author:
- Harris W. N.; Boutton T. W.; Ansley R. J.
- Source:
- Rangeland ecology & management 2008 v.61 no.6 pp. 580-587
- ISSN:
- 1551-5028
- Subject:
- grasslands; botanical composition; plant communities; soil microorganisms; soil organic carbon; soil fertility; prescribed burning; grazing; C4 plants; forage grasses; seasonal variation; dry matter accumulation; carbon nitrogen ratio; C3 plants; nitrogen; biogeochemical cycles; plant litter; Texas
- Abstract:
- ... Disturbances, such as fire and grazing, play important roles in determining grassland plant community composition and soil microbial dynamics, as well as regulating the flows of carbon (C) and nitrogen (N) between the two groups of organisms. In a mixed grassland of the southern Great Plains, we tested the hypotheses that spring-season fire would increase the absolute biomass and relative proporti ...
- DOI:
- 10.2111/07-047.1
- https://doi.org/10.2111/07-047.1
- Author:
- POLLEY, H.W.; DUGAS, W.A.; MIELNICK, P.C.; JOHNSON, H.B.
- Source:
- Functional ecology 2007 v.21 no.1 pp. 11-18
- ISSN:
- 0269-8463
- Subject:
- grasslands; grasses; forbs; elevated atmospheric gases; carbon dioxide; C3 plants; C4 plants; botanical composition; gas exchange; biogeochemical cycles; evapotranspiration; acclimation; Texas
- Abstract:
- ... Plants usually respond to carbon dioxide (CO2) enrichment by increasing photosynthesis and reducing transpiration, but these initial responses to CO2 may not be sustained. During May, July and October 2000, we measured the effects of temporarily increasing or decreasing CO2 concentration by 150-200 micromol mol-1 on daytime net ecosystem CO2 exchange (NEE) and water flux (evapotranspiration, ET) o ...
- Handle:
- 10113/543
- DOI:
- 10.1111/j.1365-2435.2006.01213.x
- https://doi.org/10.1111/j.1365-2435.2006.01213.x
20. Ecological impact of historical land‐use patterns in the great plains: a methodological assessment
- Author:
- William J. Parton; Myron P. Gutmann; Stephen A. Williams; Mark Easter; Dennis Ojima
- Source:
- Ecological applications 2005 v.15 no.6 pp. 1915-1928
- ISSN:
- 1051-0761
- Subject:
- agricultural soils; carbon; grasslands; biogeochemical cycles; soil fertility; land use change; agroecosystems; crop production; mineralization; agricultural land; soil organic matter; dryland farming; irrigated farming; grassland soils; environmental models; nitrogen; longitudinal studies; environmental impact; Nebraska; Kansas; North Dakota; Texas
- Abstract:
- ... This paper demonstrates a method for using historical county‐level agricultural land‐use data to drive an ecosystem model. Four case study counties from the U.S. Great Plains during the 19th and 20th centuries are used to represent different agroecosystems. The paper also examines the sensitivity of the estimates of county‐level ecosystem properties when using different levels of detail in the lan ...
- DOI:
- 10.1890/04-1392
- https://doi.org/10.1890/04-1392
- Author:
- Taylor, C.A.
- Source:
- Arid land research and management 2003 v.17 no.4 pp. 429-438
- ISSN:
- 1532-4982
- Subject:
- computer software; carrying capacity; biogeochemical cycles; livestock and meat industry; early development; forage; university research; prescribed burning; forage production; grasses; managers; monitoring; fuels (fire ecology); wildfires; livestock; woody plants; overgrazing; income; rangelands; ecological succession; warm season; ranchers; Texas
- Abstract:
- ... Prescribed fires are used to manipulate and manage rangelands, but effective monitoring techniques are needed to ensure that management goals and objectives are being met. The application of an effective fire program on rangelands is not a simple task. Overgrazing by livestock since the early development of the livestock industry has altered the vegetative complex on most rangelands with an increa ...
- DOI:
- 10.1080/713936109
- https://doi.org/10.1080/713936109
- Author:
- Walvoord, M.A.; Phillips, F.M.; Stonestrom, D.A.; Evans, R.D.; Hartsough, P.C.; Newman, B.D.; Striegl, R.G.
- Source:
- Science 2003 v.302 no.5647 pp. 1021-1024
- ISSN:
- 0036-8075
- Subject:
- deserts; desert soils; arid soils; nitrate nitrogen; subsoil; leaching; vadose zone; biogeochemical cycles; global budgets; Nevada; Arizona; Texas; New Mexico; Kansas; Nebraska
- Abstract:
- ... A large reservoir of bioavailable nitrogen (up to ~10⁴ kilograms of nitrogen per hectare, as nitrate) has been previously overlooked in studies of global nitrogen distribution. The reservoir has been accumulating in subsoil zones of arid regions throughout the Holocene. Consideration of the subsoil reservoir raises estimates of vadose-zone nitrogen inventories by 14 to 71% for warm deserts and ari ...
- DOI:
- 10.1126/science.1086435
- https://doi.org/10.1126/science.1086435
- Author:
- Jackson, R.B.; Banner, J.L.; Jobbagy, E.G.; Pockman, W.T.; Wall, D.H.
- Source:
- Nature 2002 v.418 no.6898 pp. 623-626
- ISSN:
- 0028-0836
- Subject:
- shrublands; nitrogen content; shrubs; soil organic carbon; woody plants; biomass; grasslands; biogeochemical cycles; Texas; Colorado; New Mexico
- Abstract:
- ... The invasion of woody vegetation into deserts, grasslands and savannas is generally thought to lead to an increase in the amount of carbon stored in those ecosystems. For this reason, shrub and forest expansion (for example, into grasslands) is also suggested to be a substantial, if uncertain, component of the terrestrial carbon sink. Here we investigate woody plant invasion along a precipitation ...
- DOI:
- 10.1038/nature00910
- PubMed:
- 12167857
- https://doi.org/10.1038/nature00910
- Author:
- Goodale, C.L.; Davidson, E.A.
- Source:
- Nature 2002 v.418 no.6898 pp. 593-594
- ISSN:
- 0028-0836
- Subject:
- shrublands; nitrogen content; shrubs; soil organic carbon; biomass; grasslands; biogeochemical cycles; Texas; Colorado; New Mexico
- DOI:
- 10.1038/418593a
- PubMed:
- 12167839
- https://doi.org/10.1038/418593a
- Author:
- A. J. Londo; M. G. Messina; S. H. Schoenholtz
- Source:
- Soil Science Society of America journal 1999 v.63 no.3 pp. 637-644
- ISSN:
- 0361-5995
- Subject:
- lowland forests; bottomland soils; soil temperature; soil water content; carbon dioxide; losses from soil; clearcutting; felling; biogeochemical cycles; emissions; soil respiration; Texas
- Abstract:
- ... The effect of forest disturbance on C cycling has become an issue, given concerns about escalating atmospheric C content. We examined the effects of harvest intensity on in situ and laboratory mineral soil respiration in an East Texas bottomland hardwood forest between 6 and 22 mo after harvesting. Treatments included a clearcut, a partial cut wherein approximately 58% of the basal area was remove ...
- DOI:
- 10.2136/sssaj1999.03615995006300030029x
- https://doi.org/10.2136/sssaj1999.03615995006300030029x
- Author:
- R. F. Follett; E. A. Paul; S. W. Leavitt; A. D. Halvorson; D. Lyon; G. A. Peterson
- Source:
- Soil Science Society of America journal 1997 v.61 no.4 pp. 1068-1077
- ISSN:
- 0361-5995
- Subject:
- grassland soils; wheat soils; fallow; virgin soils; soil organic matter; carbon; stable isotopes; soil depth; biogeochemical cycles; Saskatchewan; Montana; North Dakota; Wyoming; Nebraska; Colorado; Kansas; Texas; Oklahoma
- Abstract:
- ... The purposes of this study were to improve knowledge of regional vegetation patterns of C₃ and C₄ plants in the North American Great Plains and to use δ¹³C methodology and long-term research sites to determine contributions of small-grain crops to total soil organic carbon (SOC) now present. Archived and recent soil samples were used. Detailed soil sampling was in 1993 at long-term sites near Akro ...
- DOI:
- 10.2136/sssaj1997.03615995006100040012x
- https://doi.org/10.2136/sssaj1997.03615995006100040012x
- Author:
- K. N. Potter; O. R. Jones; H. A. Torbert; P. W. Unger
- Source:
- Soil science 1997 v.162 no.2 pp. 140-147
- ISSN:
- 0038-075X
- Subject:
- semiarid soils; soil organic matter; carbon; mass; spatial distribution; soil profiles; Triticum aestivum; Sorghum bicolor; fallow; continuous cropping; crop rotation; no-tillage; stubble; stubble mulching; nitrogen fertilizers; dryland farming; biogeochemical cycles; application rate; Texas
- DOI:
- 10.1097/00010694-199702000-00007
- https://doi.org/10.1097/00010694-199702000-00007
- Author:
- J. R. Salinas-Garcia; F. M. Hons; J. E. Matocha
- Source:
- Soil Science Society of America journal 1997 v.61 no.1 pp. 152-159
- ISSN:
- 0361-5995
- Subject:
- minimum tillage; soil organic carbon; no-tillage; spatial distribution; soil depth; seasonal variation; application rate; biogeochemical cycles; plowing; soil microorganisms; mineralization; conventional tillage; corn soils; spatial variation; biomass; nitrogen fertilizers; nitrogen; chiseling; Texas
- Abstract:
- ... Understanding the effects of long-term management practices on soil C and N pools and activities is essential for sustaining soil productivity. The objectives of this study were to evaluate long-term and seasonal changes in soil organic C (SOC), soil microbial biomass C (SMBC) and N (SMBN), and mineralizable C and N in continuous corn (Zea mays L.) under conventional tillage (CT), moldboard (MB), ...
- DOI:
- 10.2136/sssaj1997.03615995006100010023x
- https://doi.org/10.2136/sssaj1997.03615995006100010023x
- Author:
- Franzluebbers, A.J.; Haney, R.L.; Hons, F.M.; Zuberer, D.A.
- Source:
- Soil biology & biochemistry 1996 v.28 no.10/11 pp. 1367-1372
- ISSN:
- 0038-0717
- Subject:
- mineralization; textural soil types; fractionation; soil organic carbon; nitrogen; clay; soil microorganisms; biological activity in soil; soil respiration; soil texture; biomass; biogeochemical cycles; Texas
- Abstract:
- ... Relationships between soil organic C (SOC), soil microbial biomass C (SMBC), mineralizable C and N during a 21 d incubation, and basal soil respiration (BSR) were evaluated on eight soil types from Texas that varied in soil texture (7-45% clay) and organic matter. The portion of SOC as SMBC increased with increasing clay content, whereas the relationships of mineralizable C and N and BSR to SOC we ...
- Handle:
- 10113/9925
- DOI:
- 10.1016/S0038-0717(96)00143-5
- https://doi.org/10.1016/S0038-0717(96)00143-5