Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Bas Kempen"'
Autor:
Tomislav Hengl, Jorge Mendes de Jesus, Gerard B M Heuvelink, Maria Ruiperez Gonzalez, Milan Kilibarda, Aleksandar Blagotić, Wei Shangguan, Marvin N Wright, Xiaoyuan Geng, Bernhard Bauer-Marschallinger, Mario Antonio Guevara, Rodrigo Vargas, Robert A MacMillan, Niels H Batjes, Johan G B Leenaars, Eloi Ribeiro, Ichsani Wheeler, Stephan Mantel, Bas Kempen
Publikováno v:
PLoS ONE, Vol 12, Iss 2, p e0169748 (2017)
This paper describes the technical development and accuracy assessment of the most recent and improved version of the SoilGrids system at 250m resolution (June 2016 update). SoilGrids provides global predictions for standard numeric soil properties (
Externí odkaz:
https://doaj.org/article/ad46a8c2c401417e8b291d79603dfb3a
Publikováno v:
ISPRS International Journal of Geo-Information, Vol 8, Iss 8, p 351 (2019)
This study compares the performance of five popular equal-area projections supported by Free and Open Source Software for Geo-spatial (FOSS4G)—Sinusoidal, Mollweide, Hammer, Eckert IV and Homolosine. A set of 21,872 discrete distortion vindicatrice
Externí odkaz:
https://doaj.org/article/35d3854afbd24a1ab96804b841c3654a
Autor:
Tomislav Hengl, Gerard B M Heuvelink, Bas Kempen, Johan G B Leenaars, Markus G Walsh, Keith D Shepherd, Andrew Sila, Robert A MacMillan, Jorge Mendes de Jesus, Lulseged Tamene, Jérôme E Tondoh
Publikováno v:
PLoS ONE, Vol 10, Iss 6, p e0125814 (2015)
80% of arable land in Africa has low soil fertility and suffers from physical soil problems. Additionally, significant amounts of nutrients are lost every year due to unsustainable soil management practices. This is partially the result of insufficie
Externí odkaz:
https://doaj.org/article/5060dccad0bd44989be3d928e1db2fe3
Autor:
Tomislav Hengl, Jorge Mendes de Jesus, Robert A MacMillan, Niels H Batjes, Gerard B M Heuvelink, Eloi Ribeiro, Alessandro Samuel-Rosa, Bas Kempen, Johan G B Leenaars, Markus G Walsh, Maria Ruiperez Gonzalez
Publikováno v:
PLoS ONE, Vol 9, Iss 8, p e105992 (2014)
BACKGROUND: Soils are widely recognized as a non-renewable natural resource and as biophysical carbon sinks. As such, there is a growing requirement for global soil information. Although several global soil information systems already exist, these te
Externí odkaz:
https://doaj.org/article/4295e93a62594ef58109fd7997772645
The commonly-used scorpan approach to Digital Soil Mapping is purely correlative, between observations at points and the values of covariates at those points. An-often-used approach is of maximum complexity: different quality observations are thrown
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb56fcc616d12feb82e711b25af7991b
https://doi.org/10.5194/egusphere-egu23-7620
https://doi.org/10.5194/egusphere-egu23-7620
Autor:
Giulio Genova, Laura Poggio, Bas Kempen, Undrakh-Od Baatar, Enkhmaa Sarangerel, Uganbat Ganbold
Digital Soil Mapping (DSM) is an established methodology to create maps of soil properties at different resolutions and extents. It establishes a statistical relationship between the measured values at point observations and environmental covariates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a245e943a7fddd7d153b4b410a9cb4ee
https://doi.org/10.5194/egusphere-egu22-5101
https://doi.org/10.5194/egusphere-egu22-5101
Publikováno v:
Geoderma, 406
Geoderma 406 (2022)
Geoderma 406 (2022)
Multi-element soil extractions such as Mehlich 3 (M3) have gained popularity in recent years, but comparing outcomes to other soil testing methods is not always straightforward. In this study, extraction mechanisms of M3, Olsen and neutral 1 M ammoni
Publikováno v:
Geoderma 405 (2022)
Geoderma
Geoderma, 405
Geoderma
Geoderma, 405
Highlights • Sample Size Determination (SSD) is a crucial step in sampling design. • Bayesian, mixed Bayesian-likelihood (MBL) and frequentist SSD approaches compared. • Bayesian and MBL SSD approach account for uncertainty about design paramet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c49d65eba518f03e9d39c24351e591b
https://research.wur.nl/en/publications/bayesian-approach-for-sample-size-determination-illustrated-with-
https://research.wur.nl/en/publications/bayesian-approach-for-sample-size-determination-illustrated-with-
Autor:
Rik van den Bosch, David G. Rossiter, Laura Poggio, Andre Kooiman, Niels H. Batjes, Bas Kempen, Luis de Sousa, Gerard B. M. Heuvelink
Soils provide a variety of goods and services and are a key natural resource, non-renewable on the time scale of a human life-span, to realise several UN-Sustainable-Development–Goals, including zero hunger (SDG2), climate action (SDG13) and life o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f382427e3bed3181fc4bfefd34e4179d
https://doi.org/10.5194/ismc2021-24
https://doi.org/10.5194/ismc2021-24
Autor:
Bas Kempen, Thomas Awio, Kalimuthu Senthilkumar, Christian O. Dimkpa, George William Otim-Nape, Paul C. Struik, Tjeerd Jan Stomph
Publikováno v:
Field Crops Research 270 (2021)
Field Crops Research, 270
Field Crops Research, 270
Rice is a staple food and cash crop for smallholder farmers in sub-Saharan Africa; however, yields are very low, with indications that both macro and micro-nutrients may limit rice productivity in East Africa next to the need for good agronomic pract
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84fca8a073f4222f73e3871310c195c5
https://research.wur.nl/en/publications/micro-nutrients-in-east-african-lowlands-are-they-needed-to-inten
https://research.wur.nl/en/publications/micro-nutrients-in-east-african-lowlands-are-they-needed-to-inten