Zobrazeno 1 - 10
of 214
pro vyhledávání: '"Keith D Shepherd"'
Autor:
Jonah M. Prout, Keith D. Shepherd, Steve P. McGrath, Guy J. D. Kirk, Kirsty L. Hassall, Stephan M. Haefele
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022)
Abstract Realistic targets for soil organic carbon (SOC) concentrations are needed, accounting for differences between soils and land uses. We assess the use of SOC/clay ratio for this purpose by comparing changes over time in (a) the National Soil I
Externí odkaz:
https://doaj.org/article/ad2c9c5299ac4e60b4dae7ac7a417957
Autor:
Keith D. Shepherd, Rich Ferguson, David Hoover, Fenny van Egmond, Jonathan Sanderman, Yufeng Ge
Publikováno v:
Soil Security, Vol 7, Iss , Pp 100061- (2022)
There is growing global interest in the potential for soil reflectance spectroscopy to fill an urgent need for more data on soil properties for improved decision-making on soil security at local to global scales. This is driven by the capability of s
Externí odkaz:
https://doaj.org/article/7c23da923c5f4d44b444e77d1eba7970
Autor:
Tomislav Hengl, Matthew A. E. Miller, Josip Križan, Keith D. Shepherd, Andrew Sila, Milan Kilibarda, Ognjen Antonijević, Luka Glušica, Achim Dobermann, Stephan M. Haefele, Steve P. McGrath, Gifty E. Acquah, Jamie Collinson, Leandro Parente, Mohammadreza Sheykhmousa, Kazuki Saito, Jean-Martial Johnson, Jordan Chamberlin, Francis B. T. Silatsa, Martin Yemefack, John Wendt, Robert A. MacMillan, Ichsani Wheeler, Jonathan Crouch
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-18 (2021)
Abstract Soil property and class maps for the continent of Africa were so far only available at very generalised scales, with many countries not mapped at all. Thanks to an increasing quantity and availability of soil samples collected at field point
Externí odkaz:
https://doaj.org/article/99f484c0771a491480592db97c08eade
Autor:
Gifty E. Acquah, Javier Hernandez-Allica, Cathy L. Thomas, Sarah J. Dunham, Erick K. Towett, Lee B. Drake, Keith D. Shepherd, Steve P. McGrath, Stephan M. Haefele
Publikováno v:
PLoS ONE, Vol 17, Iss 1 (2022)
With the increasing popularity of local blending of fertilisers, the fertiliser industry faces issues regarding quality control and fertiliser adulteration. Another problem is the contamination of fertilisers with trace elements that have been shown
Externí odkaz:
https://doaj.org/article/ed990a30ef844b8aa18c9832b000dbba
Publikováno v:
PLoS ONE, Vol 17, Iss 2, p e0262754 (2022)
Adept use of fertilizers is critical if sustainable development goal two of zero hunger and agroecosystem resilience are to be achieved for African smallholder agroecosystems. These heterogeneous systems are characterized by poor soil health mainly a
Externí odkaz:
https://doaj.org/article/71620b61cd9e4479bf6143e9ca77f4c8
Publikováno v:
PLoS Biology, Vol 19, Iss 11 (2021)
Open access, high-resolution soil property maps have been created for Africa at 30 m resolution, using machine learning trained on over 100,000 analysed soil samples. Combined with other field-level information, iSDAsoil enables the possibility of si
Externí odkaz:
https://doaj.org/article/ad17c737df4a47c290a58a27d87887b6
Publikováno v:
PLoS ONE, Vol 15, Iss 6, p e0234213 (2020)
Agricultural development projects have a poor track record of success mainly due to risks and uncertainty involved in implementation. Cost-benefit analysis can help allocate resources more effectively, but scarcity of data and high uncertainty makes
Externí odkaz:
https://doaj.org/article/287b7920d9434db68df55290e773f31c
Autor:
Erick K Towett, Lee B Drake, Gifty E Acquah, Stephan M Haefele, Steve P McGrath, Keith D Shepherd
Publikováno v:
PLoS ONE, Vol 15, Iss 12, p e0242821 (2020)
Portable X-ray fluorescence (pXRF) and Diffuse Reflectance Fourier Transformed Mid-Infrared (DRIFT-MIR) spectroscopy are rapid and cost-effective analytical tools for material characterization. Here, we provide an assessment of these methods for the
Externí odkaz:
https://doaj.org/article/fdb602bb95104d0e9979d7774ecf89bf
Autor:
Bertin Takoutsing, Gerard B. M. Heuvelink, Jetse J. Stoorvogel, Keith D. Shepherd, Ermias Aynekulu
Publikováno v:
European Journal of Soil Science 73 (2022) 2
European Journal of Soil Science, 73(2)
European Journal of Soil Science, 73(2)
Digital soil mapping (DSM) approaches provide soil information by utilising the relationship between soil properties and environmental variables. Calibration of DSM models requires measurements that may often have substantial measurement errors which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf51332168fcba746a382bf0a48fe360
https://research.wur.nl/en/publications/accounting-for-analytical-and-proximal-soil-sensing-errors-in-dig
https://research.wur.nl/en/publications/accounting-for-analytical-and-proximal-soil-sensing-errors-in-dig
Autor:
Jonah M. Prout, Keith D. Shepherd, Steve P. McGrath, Guy J. D. Kirk, Kirsty L. Hassall, Stephan M. Haefele
Publikováno v:
Scientific reports. 12(1)
Realistic targets for soil organic carbon (SOC) concentrations are needed, accounting for differences between soils and land uses. We assess the use of SOC/clay ratio for this purpose by comparing changes over time in (a) the National Soil Inventory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63ae19aeac5b28f0bb7e0bc6dbc245ef
https://pubmed.ncbi.nlm.nih.gov/35338205
https://pubmed.ncbi.nlm.nih.gov/35338205