Hans W. Griepentrog

ORCID: 0000-0002-2884-055X
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About
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Research Areas
  • Smart Agriculture and AI
  • Soil Mechanics and Vehicle Dynamics
  • Agricultural Engineering and Mechanization
  • Remote Sensing and LiDAR Applications
  • Greenhouse Technology and Climate Control
  • Remote Sensing in Agriculture
  • Soil Management and Crop Yield
  • Agronomic Practices and Intercropping Systems
  • Leaf Properties and Growth Measurement
  • Weed Control and Herbicide Applications
  • Crop Yield and Soil Fertility
  • Food Supply Chain Traceability
  • Plant Surface Properties and Treatments
  • Irrigation Practices and Water Management
  • 3D Surveying and Cultural Heritage
  • Modular Robots and Swarm Intelligence
  • Spectroscopy and Chemometric Analyses
  • Plant nutrient uptake and metabolism
  • Plant tissue culture and regeneration
  • Tree Root and Stability Studies
  • Horticultural and Viticultural Research
  • Robotics and Sensor-Based Localization
  • Agriculture and Farm Safety
  • Agricultural economics and policies
  • Robotic Path Planning Algorithms

University of Hohenheim
2015-2024

Institute of Agricultural Engineering
2015-2021

University of Copenhagen
1998-2012

Center for Research and Technology Thessaly
2009

Summary Recent advances in our understanding of the advantage initial size competition among individual plants (size‐asymmetric competition) suggest that potential for many crops to suppress weeds is much greater than generally appreciated. We hypothesize this can be realized if: (i) crop density increased significantly and (ii) regularly (uniformly) distributed two‐dimensional space rather sown traditional rows. tested these hypotheses by sowing four varieties spring wheat Triticum aestivum...

10.1046/j.1365-2664.2001.00634.x article EN Journal of Applied Ecology 2001-08-01

Evolutionary theory can be applied to improve agricultural yields and/or sustainability, an approach we call Agroecology. The basic idea is that plant breeding unlikely attributes already favored by millions of years natural selection, whereas there may unutilized potential in selecting for increase total crop yield but reduce plants' individual fitness. In other words, should based on group selection. We explore this relation crop-weed competition, and argue it possible develop high density...

10.1111/j.1752-4571.2010.00144.x article EN Evolutionary Applications 2010-07-14

Summary It has been hypothesized that increased crop density and spatial uniformity can increase weed suppression thereby play a role in management. Field experiments were performed over 2 years to investigate the effects of arrangement spring wheat ( Triticum aestivum ) on biomass yield weed‐infested fields. We used three patterns (normal rows, random uniform) densities (204, 449 721 seeds m −2 ), plus fourth (1000 pattern. Increased reduced all patterns. Weed was lower higher sown uniform...

10.1111/j.1365-3180.2005.00456.x article EN Weed Research 2005-07-08

In this study, the evaluation of accuracy and performance a light detection ranging (LIDAR) sensor for vegetation using distance reflection measurements aiming to detect discriminate maize plants weeds from soil surface was done. The study continues previous work carried out in field Spain with LIDAR exclusively one index, height profile. current system uses combination two mentioned indexes. experiment at growth stage 12–14, 16 different locations selected represent widest possible density...

10.3390/s131114662 article EN cc-by Sensors 2013-10-29

3D crop reconstruction with a high temporal resolution and by the use of non-destructive measuring technologies can support automation plant phenotyping processes. Thereby, availability such data give valuable information about development interaction genotype environment. This article presents new methodology for georeferenced maize structure. For this purpose total station, an IMU, several 2D LiDARs different orientations were mounted on autonomous vehicle. By multistep presented, based...

10.3390/rs71215870 article EN cc-by Remote Sensing 2015-12-17

Intra-row weeding is a time consuming and challenging task. Therefore, rotary weeder implement for an autonomous electrical robot was developed. It can be used to remove the weeds of intra-row area orchards vineyards. The hydraulic motor conventional tool replaced by electric some mechanical parts were refabricated reduce overall weight. side shift, height tilt adjustment performed linear motors. For detecting trunk positions, two different methods evaluated: A electromechanical sensor...

10.3390/agriculture9010018 article EN cc-by Agriculture 2019-01-10

Previous research has shown that both the density and spatial pattern of wheat have an influence on crop growth weed suppression, but it is not clear what degree uniformity necessary to achieve major improvements in suppression. Field experiments were performed over 3 yr investigate effects different distributions The spring sown five patterns three densities small weed-infested plots analyzed with use digitized photographs field describe locations individual plants as x y coordinates. We...

10.1614/ws-d-11-00172.1 article EN Weed Science 2012-08-06

Agricultural production management is entering into a new era where every day farmer's decisions are supported by highly sophisticated Farm Management Information Systems (FMISs). The latter have evolved from simple record keeping software complex systems that can manipulate large amounts of data and provide decision support capabilities. In this paper, the development an FMIS, which utilizes technologies, such as those were introduced European initiative Future Internet Public-Private...

10.1016/j.ifacol.2016.10.060 article EN IFAC-PapersOnLine 2016-01-01

Nitrogen (N) excess due to mineral fertilization in conventional crop farming has a significant negative impact on the environment. Variable rate N application (VRNA) is promising tool increase recovery rates spatially heterogeneous fields. Real-time sensor systems for VRNA usually consider only crop's status and their algorithms are abundantly deterministic. Due education professional experience, farmers have considerable knowledge base that should be used describe dynamic non-deterministic...

10.1016/j.compag.2021.106008 article EN cc-by Computers and Electronics in Agriculture 2021-02-15

In this article, a mission planner of field coverage operations for an autonomous agricultural tractor is presented. Missions particular are defined using XML (extendible markup language) formatted file that can be uploaded to the through user interface. Using tree hierarchy file, several actions determined, including sequence points has follow, type motion between successive (e.g., straight or maneuvering), predefined turning routine used in maneuvering, and should taken once reaches...

10.13031/2013.29123 article EN Transactions of the ASABE 2009-01-01
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