J
Johannes Forkman
Researcher at Swedish University of Agricultural Sciences
Publications - 55
Citations - 991
Johannes Forkman is an academic researcher from Swedish University of Agricultural Sciences. The author has contributed to research in topics: Subsoil & Cutting. The author has an hindex of 13, co-authored 52 publications receiving 764 citations. Previous affiliations of Johannes Forkman include University of Agricultural Sciences, Dharwad.
Papers
More filters
Journal ArticleDOI
Persistent effects of subsoil compaction on pore size distribution and gas transport in a loamy soil
F.E. Berisso,Per Schjønning,Thomas Keller,Mathieu Lamandé,Ararso Etana,L. W. de Jonge,Bo V. Iversen,Johan Arvidsson,Johannes Forkman +8 more
TL;DR: In this article, the authors evaluated and quantified persistent effects of subsoil compaction on soil pore structure and gas transport processes using intact cores taken at 0.3, 0.5,0.7 and 0.9m depth from a loamy soil in a compaction experiment in southern Sweden (Brahmehem Farm).
Journal ArticleDOI
Estimator and Tests for Common Coefficients of Variation in Normal Distributions
TL;DR: In this article, an explicit estimator of a coefficient of variation that is shared by several populations with normal distributions is proposed, and methods for making confidence intervals and statistical tests, based on McKay's approximation for the coefficient of variance, are provided.
Journal ArticleDOI
Persistent subsoil compaction and its effects on preferential flow patterns in a loamy till soil
Ararso Etana,Mats Larsbo,Thomas Keller,Johan Arvidsson,Per Schjønning,Johannes Forkman,Nick Jarvis +6 more
TL;DR: In this paper, the persistence of subsoil compaction was investigated in a field experiment in southern Sweden using a 6-row sugar beet harvester with a wheel load of c. 10.4 mg.
Journal ArticleDOI
Two decades of no-till in the Oberacker long-term field experiment: Part I. Crop yield, soil organic carbon and nutrient distribution in the soil profile
Ingrid Martínez,Andreas Chervet,Peter Weisskopf,Wolfgang G. Sturny,Ararso Etana,Matthias Stettler,Johannes Forkman,Thomas Keller +7 more
TL;DR: In this paper, the authors compared two tillage systems, conventional tillage with mouldboard ploughing (MP) and no-till (NT), on a sandy loam.
Journal ArticleDOI
Gas transport and subsoil pore characteristics: Anisotropy and long-term effects of compaction
F.E. Berisso,Per Schjønning,Thomas Keller,Mathieu Lamandé,Asko Simojoki,Bo V. Iversen,Laura Alakukku,Johannes Forkman +7 more
TL;DR: In this paper, the authors quantified anisotropy of subsoil pore functions and investigated the long-term impact of soil compaction by agricultural machinery on the transport of gas and water in soil.