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  1. Buch ; Online ; E-Book: Soil health analysis set

    Karlen, D. L. / Stott, Diane E. / Mikha, Maysoon M.

    (ASA, CSSA, and SSSA Bks.)

    2021  

    Verfasserangabe edited by Douglas L. Karlen, Diane E. Stott, Maysoon M. Mikha
    Serientitel ASA, CSSA, and SSSA Bks.
    Schlagwörter Soils/Analysis
    Thema/Rubrik (Code) 631.41
    Sprache Englisch
    Umfang 1 online resource (576 pages)
    Verlag Soil Science Society of America, Inc
    Erscheinungsort Madison, Wisconsin
    Dokumenttyp Buch ; Online ; E-Book
    Bemerkung Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    ISBN 0-89118-990-4 ; 0-89118-991-2 ; 0-89118-988-2 ; 978-0-89118-990-9 ; 978-0-89118-991-6 ; 978-0-89118-988-6
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  2. Buch ; Online ; E-Book: Approaches to soil health analysis / Volume 1 /

    Karlen, D. L. / Stott, Diane E. / Mikha, Maysoon M.

    (ASA, CSSA, and SSSA Bks.)

    2021  

    Verfasserangabe edited by Douglas L. Karlen, Diane E. Stott, Maysoon M. Mikha
    Serientitel ASA, CSSA, and SSSA Bks.
    Schlagwörter Soil ecology
    Thema/Rubrik (Code) 577.57
    Sprache Englisch
    Umfang 1 online resource (227 pages)
    Verlag Soil Science Society of America, Inc ; Wiley
    Erscheinungsort Madison, Wisconsin ; Hoboken ,New Jersey
    Dokumenttyp Buch ; Online ; E-Book
    Bemerkung Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    ISBN 0-89118-985-8 ; 0-89118-981-5 ; 0-89118-984-X ; 0-89118-980-7 ; 978-0-89118-985-5 ; 978-0-89118-981-7 ; 978-0-89118-984-8 ; 978-0-89118-980-0
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  3. Buch ; Online ; E-Book: Laboratory methods for soil health analysis / Volume 2. /

    Karlen, D. L. / Stott, Diane E. / Mikha, Maysoon M.

    (Soil Health Series ; Volume 2)

    2021  

    Verfasserangabe edited by Douglas L. Karlen, Diane E. Stott, and Maysoon M. Mikha
    Serientitel Soil Health Series ; Volume 2
    Schlagwörter Soil ecology ; Soil biology ; Soil conservation
    Thema/Rubrik (Code) 577.57
    Sprache Englisch
    Umfang 1 online resource (352 pages)
    Verlag Wiley
    Erscheinungsort Hoboken, New Jersey
    Dokumenttyp Buch ; Online ; E-Book
    Bemerkung Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    ISBN 0-89118-986-6 ; 0-89118-983-1 ; 0-89118-987-4 ; 0-89118-982-3 ; 978-0-89118-986-2 ; 978-0-89118-983-1 ; 978-0-89118-987-9 ; 978-0-89118-982-4
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

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  4. Buch ; Online: Characterizing the spread of CoViD-19

    Karlen, Dean

    2020  

    Abstract: Since the beginning of the epidemic, daily reports of CoViD-19 cases, hospitalizations, and deaths from around the world have been publicly available. This paper describes methods to characterize broad features of the spread of the disease, with ... ...

    Abstract Since the beginning of the epidemic, daily reports of CoViD-19 cases, hospitalizations, and deaths from around the world have been publicly available. This paper describes methods to characterize broad features of the spread of the disease, with relatively long periods of constant transmission rates, using a new population modeling framework based on discrete-time difference equations. Comparative parameters are chosen for their weak dependence on model assumptions. Approaches for their point and interval estimation, accounting for additional sources of variance in the case data, are presented. These methods provide a basis to quantitatively assess the impact of changes to social distancing policies using publicly available data. As examples, data from Ontario and German states are analyzed using this framework. German case data show a small increase in transmission rates following the relaxation of lock-down rules on May 6, 2020. By combining case and death data from Germany, the mean and standard deviation of the time from infection to death are estimated.

    Comment: 17 pages, 10 figures. Submitted to Statistical Methods in Medical Research
    Schlagwörter Physics - Physics and Society ; Quantitative Biology - Populations and Evolution ; Statistics - Applications
    Thema/Rubrik (Code) 310
    Erscheinungsdatum 2020-07-14
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel: Characterizing the spread of CoViD-19

    Karlen, Dean

    Abstract: Since the beginning of the epidemic, daily reports of CoViD-19 cases, hospitalizations, and deaths from around the world have been publicly available. This paper describes methods to characterize broad features of the spread of the disease, with ... ...

    Abstract Since the beginning of the epidemic, daily reports of CoViD-19 cases, hospitalizations, and deaths from around the world have been publicly available. This paper describes methods to characterize broad features of the spread of the disease, with relatively long periods of constant transmission rates, using a new population modeling framework based on discrete-time difference equations. Comparative parameters are chosen for their weak dependence on model assumptions. Approaches for their point and interval estimation, accounting for additional sources of variance in the case data, are presented. These methods provide a basis to quantitatively assess the impact of changes to social distancing policies using publicly available data. As examples, data from Ontario and German states are analyzed using this framework. German case data show a small increase in transmission rates following the relaxation of lock-down rules on May 6, 2020. By combining case and death data from Germany, the mean and standard deviation of the time from infection to death are estimated.
    Schlagwörter covid19
    Verlag ArXiv
    Dokumenttyp Artikel
    Datenquelle COVID19

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  6. Buch: Energy issues affecting corn/soybean systems

    Karlen, D. L

    challenges for sustainable production

    (CAST issue paper, ; no. 48)

    2012  

    Titelvarianten Energy issues affecting corn soybean systems ; Energy issues affecting corn and soybean systems
    Körperschaft Council for Agricultural Science and Technology
    Verfasserangabe [authors, Douglas L. Karlen ... et al.]
    Serientitel CAST issue paper, ; no. 48
    Schlagwörter Plant biomass. ; Renewable natural resources. ; Sustainable agriculture.
    Sprache Englisch
    Umfang 16 p. :, col. ill. ;, 28 cm.
    Verlag Council for Agricultural Science and Technology
    Erscheinungsort Ames, Iowa
    Dokumenttyp Buch
    Anmerkung Caption title. ; "January 2012."
    Datenquelle NAL Katalog (AGRICOLA)

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  7. Artikel ; Online: How does tillage intensity affect chemical soil health indicators? A United States meta‐analysis

    Nunes, Marcio R. / Karlen, D. L. / Moorman, Thomas B. / Cambardella, Cynthia A.

    Agrosystems, geosciences & environment. 2020, v. 3, no. 1 p.e20083-

    2020  

    Abstract: Tillage intensity can affect chemical soil health indicators either positively or negatively depending on inherent soil properties and management practices. Soil chemical data (total N, P, K, Ca, Mg, and pH) from four depth increments within 196 ... ...

    Abstract Tillage intensity can affect chemical soil health indicators either positively or negatively depending on inherent soil properties and management practices. Soil chemical data (total N, P, K, Ca, Mg, and pH) from four depth increments within 196 published studies were compiled and subjected to a meta‐analysis comparing chisel plow (CP), no‐till (NT), and perennial systems (PER) with moldboard plowing (MP). Overall, CP did not affect soil chemical indicators when compared to MP, but converting from MP to NT increased total N, P, and K concentrations within the top 15 cm. Below that depth, Ca and Mg concentrations were lower under NT than MP but total N, P, and K were not significantly different. Topsoil total N response to NT was moderated by soil order and cropping system, with the largest increase in total N found in Ultisols, Inceptisols, Alfisols, and Mollisols under more diversified cropping systems including those with cover crops. The greatest topsoil P increase in response to NT was found under long‐term experiments (>5‐yr) and on fine‐textured soils. Phosphorus changes in studies on coarse‐textured soils, with short‐term duration, and manure applications were generally neutral. Perennial systems had lower soil P and K but higher total N content in the surface layer as compared to MP. The positive response to PER systems was most notable in Alfisols, Mollisols, and Ultisols and under long‐term PER management. Finally, we demonstrate that these chemical indicators respond to tillage and cropping systems over a wide range of conditions, showing utility for soil health assessment.
    Schlagwörter Alfisols ; Inceptisols ; Mollisols ; Ultisols ; agricultural soils ; calcium ; chiseling ; coarse-textured soils ; cover crops ; fine-textured soils ; magnesium ; manure spreading ; meta-analysis ; moldboard plows ; no-tillage ; perennial cropping ; phosphorus ; plowing ; potassium ; soil depth ; soil nutrients ; soil pH ; soil quality ; soil surface layers ; topsoil ; total nitrogen ; total phosphorus ; United States
    Sprache Englisch
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ISSN 2639-6696
    DOI 10.1002/agg2.20083
    Datenquelle NAL Katalog (AGRICOLA)

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  8. Artikel: Loamy sand soil approaches organic carbon saturation after 37 years of conservation tillage

    Novak, J.M. / Watts, D.W. / Bauer, P.J. / Karlen, D.L. / Hunt, P.G. / Mishra, U.

    Agronomy journal. 2020 July, v. 112, no. 4

    2020  

    Abstract: Conservation tillage is reported to increase soil organic carbon (SOC) and total nitrogen (TN) contents, but long‐term (>30 yr) field results quantifying the responses in Coastal Plain Ultisols are sparse. The distribution, accumulation, and topsoil ... ...

    Abstract Conservation tillage is reported to increase soil organic carbon (SOC) and total nitrogen (TN) contents, but long‐term (>30 yr) field results quantifying the responses in Coastal Plain Ultisols are sparse. The distribution, accumulation, and topsoil storage of SOC and TN after 37 yr of crop production using conventional (CvT) or conservation tillage (CnT) on a Norfolk loamy sand (fine‐loamy, kaolinitic, thermic, Typic Kandiudults) were quantified. Soil samples were collected annually from the 0−5‐, 5−10‐, and 10−15‐cm depth increments beneath corn (Zea mays L.), soybean [Glycine max (L.) Merr.], and cotton (Gossypium hirsutum L.) crops. Overall, SOC and TN accumulation in the 0−5‐cm depth were highest for Norfolk soil under CnT. Focusing on total long‐term changes for the 0−15‐cm sampling depth beneath various corn crops shows that CnT and CvT sequestered 24.7 and 21.4 Mg C ha⁻¹, respectively. Between 1978 and 2016, there was a highly significant (P < .0001) exponential increase in SOC within the top 5‐cm soil depth. However, the exponential curves began to plateau suggesting the Norfolk topsoil was approaching its organic carbon (OC) storage capacity. These field measurements strongly indicate that additional topsoil SOC increases with current tillage and crop management practices are limited.
    Schlagwörter Glycine max ; Gossypium hirsutum ; Kandiudults ; Zea mays ; agronomy ; coastal plains ; conservation tillage ; corn ; cotton ; crop management ; crop production ; kaolinite ; loamy sand soils ; soil depth ; soil organic carbon ; soybeans ; topsoil ; total nitrogen
    Sprache Englisch
    Erscheinungsverlauf 2020-07
    Umfang p. 3152-3162.
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 410332-4
    ISSN 1435-0645 ; 0002-1962
    ISSN (online) 1435-0645
    ISSN 0002-1962
    DOI 10.1002/agj2.20184
    Datenquelle NAL Katalog (AGRICOLA)

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  9. Artikel: Corn Stover Nutrient Removal Estimates for Central Iowa, USA

    Karlen, Douglas / Kovar, John / Birrell, Stuart

    Sustainability. 2015 July 2, v. 7, no. 7

    2015  

    Abstract: One of the most frequent producer-asked questions to those persons striving to secure sustainable corn (Zea mays L.) stover feedstock supplies for Iowa’s new bioenergy conversion or other bio-product facilities is “what quantity of nutrients will be ... ...

    Abstract One of the most frequent producer-asked questions to those persons striving to secure sustainable corn (Zea mays L.) stover feedstock supplies for Iowa’s new bioenergy conversion or other bio-product facilities is “what quantity of nutrients will be removed if I harvest my stover?” Our objective is to summarize six years of field research from central Iowa, U.S.A. where more than 600, 1.5 m2 samples were collected by hand and divided into four plant fractions: vegetative material from the ear shank upward (top), vegetative material from approximately 10 cm above the soil surface to just below the ear (bottom), cobs, and grain. Another 400 stover samples, representing the vegetative material collected directly from a single-pass combine harvesting system or from stover bales were also collected and analyzed. All samples were dried, ground, and analyzed to determine C, N, P, K, Ca, Mg, S, Al, B, Cu, Fe, Mn, and Zn concentrations. Mean concentration and dry matter estimates for each sample were used to calculate nutrient removal and estimate fertilizer replacement costs which averaged $25.06, $20.04, $16.62, $19.40, and $27.41 Mg−1 for top, bottom, cob, stover, and grain fractions, respectively. We then used the plant fraction estimates to compare various stover harvest scenarios and provide an answer to the producer question posed above.
    Schlagwörter Zea mays ; aluminum ; bales ; bioenergy ; boron ; calcium ; carbon ; copper ; corn ; corn stover ; feedstocks ; fertilizers ; harvesting ; iron ; magnesium ; manganese ; nitrogen ; nutrients ; phosphorus ; potassium ; soil ; zinc ; Iowa
    Sprache Englisch
    Erscheinungsverlauf 2015-0702
    Umfang p. 8621-8634.
    Dokumenttyp Artikel
    ZDB-ID 2518383-7
    ISSN 2071-1050
    ISSN 2071-1050
    DOI 10.3390/su7078621
    Datenquelle NAL Katalog (AGRICOLA)

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  10. Artikel ; Online: Harvested winter rye energy cover crop: multiple benefits for North Central US

    Malone, Robert W. / Radke, Anna / Herbstritt, Steph / Wu, Huaiqing / Qi, Zhiming / Emmett, Bryan D. / Helmers, Matthew J. / Schulte, Lisa A. / Feyereisen, Gary W. / O’Brien, Peter L. / Kovar, John L. / Rogovska, Natalia / Kladivko, Eileen J. / Thorp, Kelly R. / Kaspar, Tom C. / Jaynes, Dan B. / Karlen, D. L. / Richard, Tom L.

    Environmental Research Letters. 2023 June 16, v. 18, no. 7 p.074009-

    2023  

    Abstract: Cover crops (CCs) can reduce nitrogen (N) loss to subsurface drainage and can be reimagined as bioenergy crops for renewable natural gas production and carbon (C) benefits (fossil fuel substitution and C storage). Little information is available on the ... ...

    Abstract Cover crops (CCs) can reduce nitrogen (N) loss to subsurface drainage and can be reimagined as bioenergy crops for renewable natural gas production and carbon (C) benefits (fossil fuel substitution and C storage). Little information is available on the large-scale adoption of winter rye for these purposes. To investigate the impacts in the North Central US, we used the Root Zone Water Quality Model to simulate corn-soybean rotations with and without winter rye across 40 sites. The simulations were interpolated across a five-state area (IA, IL, IN, MN, and OH) with counties in the Mississippi River basin, which consists of ∼8 million ha with potential for rye CCs on artificially drained corn-soybean fields (more than 63 million ha
    Schlagwörter Root Zone Water Quality Model ; alternative fuels ; bioenergy ; carbon ; cover crops ; energy ; natural gas ; nitrogen ; research ; simulation models ; soybeans ; subsurface drainage ; watersheds ; winter rye ; Midwestern United States ; Mississippi River
    Sprache Englisch
    Erscheinungsverlauf 2023-0616
    Erscheinungsort IOP Publishing
    Dokumenttyp Artikel ; Online
    Anmerkung Resource is Open Access
    ZDB-ID 2255379-4
    ISSN 1748-9326
    ISSN 1748-9326
    DOI 10.1088/1748-9326/acd708
    Datenquelle NAL Katalog (AGRICOLA)

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