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  • 1
    Online Resource
    Online Resource
    Comparison of models for predicting pore space indices and their relationships with CO 2 and N 2 O fluxes in a corn–soybean field
    Canadian Science Publishing ; 2016
    In:  Canadian Journal of Soil Science Vol. 96, No. 3 ( 2016-09-01), p. 328-335
    Details
    In: Canadian Journal of Soil Science, Canadian Science Publishing, Vol. 96, No. 3 ( 2016-09-01), p. 328-335
    Abstract: Several models predict soil pore space indices (the relative gas diffusion coefficient, D s /D o and the pore tortuosity, τ), but information is lacking on which models predicted indices better relate to soil processes. We compared pore space indices’ predictive models based on air-filled porosity (f a ) alone vs. models using air-filled porosity and total pore space (Φ) (f a  + Φ). We also assessed the relationships between these indices and CO 2 and N 2 O. The study was conducted from 2011 to 2014 on a silt loam soil at Lincoln University. Soil samples were collected at 0–10 and 10–20 cm depth and oven dried at 105 °C for 72 h. After drying, f a and Φ were calculated and later used in models for predicting D s /D o and τ. CO 2 and N 2 O were measured with a Shimadzu gas chromatograph (GC) and a photoacoustic gas analyzer (PSA). Results showed that D s /D o predicted using f a alone (Marshall and Buckingham) was higher as compared with values predicted with models based on f a  + Φ (Sallam et al., Millington, and Jin and Jury) (P  〈  0.001). However, values of τ predicted with models based on f a alone were lowest (P  〈  0.001). CO 2 and N 2 O measured with GC better related with D s /D o and τ.
    Type of Medium: Online Resource
    ISSN: 0008-4271 , 1918-1841
    URL: Article
    DOI: 10.1139/cjss-2015-0074
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2017003-8
    detail.hit.zdb_id: 417254-1
    SSG: 13
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  • 2
    Online Resource
    Online Resource
    Organic Wastes for Improving Soil Physical Properties and Enhancing Plant Growth in Container Substrates
    Informa UK Limited ; 2001
    In:  Journal of Crop Production Vol. 3, No. 1 ( 2001-06-22), p. 97-112
    Details
    In: Journal of Crop Production, Informa UK Limited, Vol. 3, No. 1 ( 2001-06-22), p. 97-112
    Type of Medium: Online Resource
    ISSN: 1092-678X
    URL: Article
    DOI: 10.1300/J144v03n01_09
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2001
    detail.hit.zdb_id: 2112966-6
    detail.hit.zdb_id: 2163790-8
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  • 3
    Online Resource
    Online Resource
    Empirical analysis of the impact of urbanization on groundwater quality within the slums of Accra, Ghana
    Wiley ; 2021
    In:  World Water Policy Vol. 7, No. 1 ( 2021-05), p. 112-131
    Details
    In: World Water Policy, Wiley, Vol. 7, No. 1 ( 2021-05), p. 112-131
    Abstract: Una proporción significativa de los habitantes de las ciudades de Ghana reside en barrios marginales donde el agua subterránea es la principal fuente de agua para usos domésticos. Este estudio examinó la calidad del agua subterránea de perforaciones (7) y pozos excavados a mano (13) en cinco barrios marginales importantes de la ciudad de Accra, Ghana. Se analizaron muestras de agua para un total de veintisiete contaminantes microbianos y fisicoquímicos en el laboratorio central de Ghana Water Company Limited. En general, la calidad del agua en los barrios marginales fue mala ya que la mayoría de los parámetros probados no cumplieron con los estándares de la OMS de 2017. Cuatro de los cinco barrios marginales (en Nima, Chorkor, Jamestown y Abokobi‐Pantang), por ejemplo, registraron altas cantidades de plomo, con valores promedio de 0,25 mg / L, 1,00 mg / L, 0,25 mg / L y 1,5 mg / L, respectivamente, que están por encima del estándar de la OMS de 0,01 mg / L. Los valores de pH en Nima (5,09), Sabon Zongo, Chorkor (6,09) y Abokobi‐Pantang (6,17) no cumplieron con el estándar de la OMS de 6,5‐8,5. Los cinco barrios marginales indicaron varios grados de contaminación bacteriológica. Los valores promedio de E. coli por barrio oscilaron entre 12,50 UFC / 100 ml y 249,00 UFC / 100 ml, mientras que la media de coliformes totales por barrio osciló entre 90,75 UFC / 100 ml y 490,25 UFC / 100 ml. La mala calidad del agua subterránea encontrada es atribuible a la eliminación inadecuada de desechos, la ubicación de pozos / pozos cerca de los inodoros y la ubicación costera de algunos de los barrios marginales. Se recomienda encarecidamente la aplicación estricta de los controles de calidad del agua, la sensibilización intensiva sobre los peligros de la eliminación inadecuada de desechos para la calidad del agua subterránea y la provisión de instalaciones de saneamiento en los barrios marginales por parte de las autoridades de la ciudad.
    Type of Medium: Online Resource
    ISSN: 2639-541X , 2639-541X
    URL: Issue
    URL: Article
    DOI: 10.1002/wwp2.v7.1
    DOI: 10.1002/wwp2.12054
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 3001065-2
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  • 4
    Online Resource
    Online Resource
    Spatial and Fractal Characterization of Soil Chemical Properties and Nutrients across Depths in a Clay-Loam Soil
    Informa UK Limited ; 2014
    In:  Communications in Soil Science and Plant Analysis Vol. 45, No. 17 ( 2014-09-25), p. 2305-2318
    Details
    In: Communications in Soil Science and Plant Analysis, Informa UK Limited, Vol. 45, No. 17 ( 2014-09-25), p. 2305-2318
    Type of Medium: Online Resource
    ISSN: 0010-3624 , 1532-2416
    URL: Article
    DOI: 10.1080/00103624.2014.932371
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2014
    detail.hit.zdb_id: 2053897-2
    SSG: 12
    SSG: 13
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  • 5
    Online Resource
    Online Resource
    Global trends in nature’s contributions to people
    Proceedings of the National Academy of Sciences ; 2020
    In:  Proceedings of the National Academy of Sciences Vol. 117, No. 51 ( 2020-12-22), p. 32799-32805
    Details
    In: Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 117, No. 51 ( 2020-12-22), p. 32799-32805
    Abstract: Declining biodiversity and ecosystem functions put many of nature’s contributions to people at risk. We review and synthesize the scientific literature to assess 50-y global trends across a broad range of nature’s contributions. We distinguish among trends in potential and realized contributions of nature, as well as environmental conditions and the impacts of changes in nature on human quality of life. We find declining trends in the potential for nature to contribute in the majority of material, nonmaterial, and regulating contributions assessed. However, while the realized production of regulating contributions has decreased, realized production of agricultural and many material commodities has increased. Environmental declines negatively affect quality of life, but social adaptation and the availability of substitutes partially offset this decline for some of nature’s contributions. Adaptation and substitutes, however, are often imperfect and come at some cost. For many of the contributions of nature, we find differing trends across different countries and regions, income classes, and ethnic and social groups, reinforcing the argument for more consistent and equitable measurement.
    Type of Medium: Online Resource
    ISSN: 0027-8424 , 1091-6490
    URL: Article
    DOI: 10.1073/pnas.2010473117
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Proceedings of the National Academy of Sciences
    Publication Date: 2020
    detail.hit.zdb_id: 209104-5
    detail.hit.zdb_id: 1461794-8
    SSG: 11
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Effect of Landscape Position on the Concentration and Distribution of Soil Carbon Fractions at Busby Forest in Central Missouri
    Kansas Academy of Science ; 2018
    In:  Transactions of the Kansas Academy of Science Vol. 121, No. 3-4 ( 2018-9-1), p. 377-
    Details
    In: Transactions of the Kansas Academy of Science, Kansas Academy of Science, Vol. 121, No. 3-4 ( 2018-9-1), p. 377-
    Type of Medium: Online Resource
    ISSN: 0022-8443
    URL: Article
    DOI: 10.1660/062.121.0408
    Language: Unknown
    Publisher: Kansas Academy of Science
    Publication Date: 2018
    detail.hit.zdb_id: 2174276-5
    detail.hit.zdb_id: 2980920-4
    SSG: 11
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  • 7
    Online Resource
    Online Resource
    Tropical tree ectomycorrhiza are distributed independently of soil nutrients
    Springer Science and Business Media LLC ; 2024
    In:  Nature Ecology & Evolution Vol. 8, No. 3 ( 2024-01-10), p. 400-410
    Details
    In: Nature Ecology & Evolution, Springer Science and Business Media LLC, Vol. 8, No. 3 ( 2024-01-10), p. 400-410
    Type of Medium: Online Resource
    ISSN: 2397-334X
    URL: Article
    DOI: 10.1038/s41559-023-02298-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2024
    detail.hit.zdb_id: 2879715-2
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  • 8
    Online Resource
    Online Resource
    Variability of Soil Physical Properties in a Clay-Loam Soil and Its Implication on Soil Management Practices
    Hindawi Limited ; 2013
    In:  ISRN Soil Science Vol. 2013 ( 2013-12-23), p. 1-8
    Details
    In: ISRN Soil Science, Hindawi Limited, Vol. 2013 ( 2013-12-23), p. 1-8
    Abstract: We assessed the spatial variability of soil physical properties in a clay-loam soil cropped to corn and soybean. The study was conducted at Lincoln University in Jefferson City, Missouri. Soil samples were taken at four depths: 0–10 cm, 10–20, 20–40, and 40–60 cm and were oven dried at 105°C for 72 hours. Bulk density (BDY), volumetric (VWC) and gravimetric (GWC) water contents, volumetric air content (VAC), total pore space (TPS), air-filled (AFPS) and water-filled (WFPS) pore space, the relative gas diffusion coefficient (DIFF), and the pore tortuosity factor (TORT) were calculated. Results showed that, in comparison to depth 1, means for AFPS, Diff, TPS, and VAC decreased in Depth 2. Opposingly, BDY, Tort, VWC, and WFPS increased in depth 2. Semivariogram analysis showed that GWC, VWC, BDY, and TPS in depth 2 fitted to an exponential variogram model. The range of spatial variability ( A 0 ) for BDY, TPS, VAC, WFPS, AFPS, DIFF, and TORT was the same (25.77 m) in depths 1 and 4, suggesting that these soil properties can be sampled together at the same distance. The analysis also showed the presence of a strong (≤25%) to weak ( 〉 75%) spatial dependence for soil physical properties.
    Type of Medium: Online Resource
    ISSN: 2090-875X
    URL: Article
    DOI: 10.1155/2013/418586
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2013
    detail.hit.zdb_id: 2668444-5
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  • 9
    Online Resource
    Online Resource
    No Tillage Improved Soil Pore Space Indices under Cover Crop and Crop Rotation
    MDPI AG ; 2021
    In:  Soil Systems Vol. 5, No. 3 ( 2021-07-06), p. 38-
    Details
    In: Soil Systems, MDPI AG, Vol. 5, No. 3 ( 2021-07-06), p. 38-
    Abstract: Assessment of the effects of crop management practices on soil physical properties is largely limited to soil moisture content, air content or bulk density, which can take considerable time to change. However, soil pore space indices evolve rapidly and could quickly detect changes in soil properties resulting from crop management practices, but they are not often measured. The objective of this study was to investigate how soil pore space indices—relative gas diffusion coefficient (Ds/Do) and pore tortuosity factor (τ)—are affected by tillage system (TL), cover crop (CC) and crop rotation (CR). A study was conducted on silt loam soil at Freeman farm, Lincoln University of Missouri during the 2011 to 2013 growing seasons. The experiment design was a randomized complete block with two tillage systems (no tillage or no-till vs conventional tillage), two cover crops (no rye vs cereal rye (Secale cereale L.)) and four crop rotations (continuous corn (Zea mays L.), continuous soybean (Glycine max L.), corn–soybean and soybean–corn successions). All the treatments were replicated three times for a total of 48 experimental units. Soils were collected from two sampling depths (SD), 0–10 and 10–20 cm, in each treatment and soil physical properties, including bulk density (BD), air-filled porosity (AFP, fa) and total pore space (TPS, Φ), were calculated. Gas diffusivity models following AFP and/or TPS were used to predict Ds/Do and τ values. Results showed that, overall, Ds/Do was significantly increased in no-tilled plots planted to cereal rye in 2012 (p = 0.001) and in 2013 (p = 0.05). No-tilled continuous corn, followed by continuous soybean and no-tilled soybean–corn rotations had the highest Ds/Do values, respectively. In magnitude, Ds/Do was also increased in no-till plots at the lower depth (10–20 cm). No-tilled plots planted with cereal rye significantly reduced τ in 2012 (p = 0.001) and in 2013 (p = 0.05). Finally, at the upper depth (0–10 cm), the no-tilled corn–soybean rotation and the tilled soybean–corn rotation had the lowest τ. However, at the lower depth (10–20 cm), the four crop rotations were not significantly different in their τ values. These results can be useful to quickly assess the changes in soil physical properties because of crop management practices and make necessary changes to enhance agricultural resilience.
    Type of Medium: Online Resource
    ISSN: 2571-8789
    URL: Article
    DOI: 10.3390/soilsystems5030038
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2932897-4
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  • 10
    Online Resource
    Online Resource
    Comparison between a Photo-Acoustic Analyzer System (PAS) and Gas Chromatograph (GC) for Measuring CO 2 and N 2 O Emissions in a Corn/Soybean Field
    Kansas Academy of Science ; 2018
    In:  Transactions of the Kansas Academy of Science Vol. 121, No. 3-4 ( 2018-09), p. 351-360
    Details
    In: Transactions of the Kansas Academy of Science, Kansas Academy of Science, Vol. 121, No. 3-4 ( 2018-09), p. 351-360
    Type of Medium: Online Resource
    ISSN: 0022-8443 , 1938-5420
    URL: Article
    DOI: 10.1660/062.121.0405
    Language: English
    Publisher: Kansas Academy of Science
    Publication Date: 2018
    detail.hit.zdb_id: 2174276-5
    detail.hit.zdb_id: 2980920-4
    SSG: 11
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