Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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GEM model for soilless cultures: review of process descriptions and suggestions for improvement
Boesten, J.J.T.I. ; Wipfler, E.L. ; Os, E.A. van; Hoogsteen, M. - \ 2019
Wageningen : Wageningen Environmental Research (Report / Wageningen Environmental Research 2950) - 67
The GEM model developed for soilless cultures consists of different submodels (A) for applications to crops grown on mats by drip irrigation, (B) for spray applications to crops grown on such mats, and (C) is for spray applications to crops grown in pots in an ebb/flood system (GEM-A, GEM-B, and GEM-C). The descriptions of the processes for pesticide behaviour in these submodels were reviewed, considering also their consistency with measurements available in the literature. For GEM-A it is recommended to include sorption to the mats, the foil surrounding the mats and the irrigation pipes and to include partitioning between the water in the mats and the plant roots. For GEM-B it is recommended to include direct contamination of the substrate mats and the troughs resulting from spray and Low Volume Mister (LVM) applications. For GEM-B and GEM-C it is recommended (i) to revise the procedures for calculating the initial concentrations in the air and the condensation water, (ii) to include deposition onto the roof by spray and LVM applications, (iii) to revise the procedure for calculating the volatilisation rates from the plant surfaces. For GEM-C it is recommended (i) to omit the sorption equilibration between the bottom 10 cm of the soil in the pots and the water on the ebb/flood tables, (ii) to revise the procedure for the flux in the gas phase between the greenhouse air and the top layer of the soil in the pots, and (iii) to use a crop-specific value for the fraction of the surface area covered by the pots.
Tussenevaluatie van de nota ‘Gezonde Groei, Duurzame Oogst’ : deelproject Milieu
Verschoor, A. ; Zwartkruis, J. ; Hoogsteen, M. ; Scheepmaker, J. ; Jong, F. de; Knaap, Y. van der; Leendertse, P. ; Boeke, S. ; Vijftigschild, R. ; Kruijne, R. ; Tamis, W. - \ 2019
Den Haag : Planbureau voor de Leefomgeving (RIVM rapport 2019-0044) - 167
An Evaluation of the Loss-on-Ignition Method for Determining the Soil Organic Matter Content of Calcareous Soils
Hoogsteen, M.J.J. ; Lantinga, E.A. ; Bakker, E.J. ; Tittonell, P.A. - \ 2018
Communications in Soil Science and Plant Analysis 48 (2018)13. - ISSN 0010-3624 - p. 1541 - 1552.
Calcite analysis procedures - ignition temperature - sample weight

The Loss-on-Ignition (LOI) method is widely employed for measuring the organic matter (OM) content of soil samples. There is a risk of carbonate losses when calcareous soil samples are analyzed through LOI, but this has never been investigated in detail. Moreover, a worldwide standard protocol for determining the carbonate content of soils is not available. The aims of this study were (i) to evaluate two commonly employed carbonate analysis procedures using calcareous and non-calcareous soil samples: the gravimetric method with (GMF) and without (GM) the addition of the antioxidant iron(II) chloride (FeCl2) and the acetic acid dissolution procedure (AAD); (ii) to evaluate the effect of ignition temperature on losses of pure calcite, calcite-quartz and calcareous soil samples. We found that the average apparent carbonate content of the non-calcareous soils was greatest for the GMF method followed by the AAD procedure. The GM method showed the smallest apparent carbonate contents. For the calcite-quartz sand mixture, ignition losses started at 600°C and increased with temperature in a sigmoidal way. LOI values stabilized at 750°C when 80% of the carbon dioxide was released. We recommend the GM procedure for carbonate analysis because the apparent carbonate contents of the non-calcareous soil samples were smallest. Furthermore, we recommend an LOI temperature of 550°C because at this ignition temperature 99.8% of the total calcite fraction remains in the soil samples.

Greenhouse gas emissions in the Netherlands 1990-2016 : National Inventory Report 2018
Coenen, P.W.H.G. ; Zanten, M.C. van; Zijlema, P.J. ; Arets, E.J.M.M. ; Baas, K. ; Berghe, A.C.W.M. van den; Huis, E.P. van; Geilenkirchen, G. ; Hoen, M. 't; Hoogsteen, M. ; Molder, R. te; Dröge, R. ; Montfoort, J.A. ; Peek, C.J. ; Vonk, J. ; Dellaert, S. ; Koch, W.W.R. - \ 2018
Bilthoven : National Institute for Public Health and the Environment (RIVM report 2018-0006) - 406
Testing of the Greenhouse Emission Model for a Dutch soilless system
Wipfler, E.L. ; Boesten, J.J.T.I. ; Hoogsteen, M.J.J. ; Linden, A. van der; Os, E.A. van; Staaij, M. van der - \ 2017
Validation of the Greenhouse Emission Model for soilless cultivation
Linden, van der, T. ; Hoogsteen, M.J.J. ; Os, E.A. van; Wipfler, E.L. ; Boesten, J.J.T.I. - \ 2017
Fate of plant protection products in soilless cultivations after drip irrigation: measured vs. modelled concentrations : Interpretation of the 2014 experiment with the Substance Emission Model
Linden, A.M.A. van der; Hoogsteen, M.J.J. ; Boesten, J.J.T.I. ; Os, E.A. van; Wipfler, E.L. - \ 2017
Bilthoven : National Institute for Public Health and the Environment (RIVM report 2016-0063) - 61
Greenhouse gas emissions in the Netherlands 1990–2015 : National Inventory Report 2017
Coenen, P.W.H.G. ; Maas, C.W.M. van der; Zijlema, P.J. ; Arets, E.J.M.M. ; Baas, K. ; Berghe, A.C.W.M. van den; Huis, E.P. van; Geilenkirchen, G. ; Hoogsteen, M. ; Spijker, J. ; Molder, R. te; Dröge, R. ; Montfoort, J.A. ; Peek, C.J. ; Vonk, J. ; Oude Voshaar, S. ; Dellaert, S. - \ 2017
Bilthoven : National Institute for Public Health and the Environment (RIVM) (RIVM report 2017-0033) - 361
Total greenhouse gas (GHG) emissions from the Netherlands in 2015 increased by approximately 4%, compared with 2014 emissions. This increase was mainly the result of the increased electricity production in coal fired plants compared to 2014. Furthermore fuel combustion in all sectors was increased as the winter of 2015 was less mild as the one in 2014. In 2015, total GHG emissions (including indirect CO2 emissions and excluding emissions from Land use, land use change and forestry (LULUCF)) in the Netherlands amounted to 195.2 Tg CO2 eq. This is approximately 12.5% below the emissions in the base year2 (223.1 Tg CO2 eq). CO2 emission have increased above the level in the base year 1990 in 2015 (+ 1.5%). This increase was offset by the reduction in the emissions since 1990 of methane, nitrous oxide and fluorinated gases (CH4, N2O and F-gases). This report documents the Netherlands’ 2017 annual submission of its greenhouse gas emissions inventory in accordance with the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (IPCC, 2006) provided by the United Nations Framework Convention on Climate Change (UNFCCC), the Kyoto Protocol and the European Union’s Greenhouse Gas Monitoring Mechanism. The report includes explanations of observed trends in emissions; an assessment of the sources with the highest contribution to the national emissions (key sources) and the uncertainty in their emissions; an itemization of methods, data sources and emission factors (EFs) applied; and a description of the quality assurance system and the verification activities performed on the data.
Estimating soil organic carbon through loss on ignition : Effects of ignition conditions and structural water loss
Hoogsteen, M.J.J. ; Lantinga, E.A. ; Bakker, E.J. ; Groot, J.C.J. ; Tittonell, P.A. - \ 2015
European Journal of Soil Science 66 (2015)2. - ISSN 1351-0754 - p. 320 - 328.

Loss on ignition (LOI) is one of the most widely used methods for measuring organic matter content in soils but does not have a universal standard protocol. A large number of factors may influence its accuracy, such as furnace type, sample mass, duration and temperature of ignition and clay content of samples. We conducted a series of experiments to quantify these effects, which enabled us to derive (i) guidelines for ignition conditions (sample mass, duration and temperature), (ii) temperature-specific soil organic matter (SOM) to soil organic carbon (SOC) conversion factors and (iii) clay content-dependent correction factors for structural water loss (SWL). Bulk samples of a sandy soil (4% clay) and a silt loam soil (25% clay) were used to evaluate the effects of ignition conditions. Samples with a range of clay contents (0-50%) were used to quantify conversion and correction factors. Two furnaces, one without and one with pre-heated air, did not show significant differences in terms of within-batch LOI variability. In both furnaces less combustion occurred close to the door, which necessitated tray turning at half-time as this reduced the standard deviation per batch significantly. Variation in mass loss declined exponentially with sample mass (range, 0.15-20g). The LOI increased with duration at lower temperatures (≤550°C) for the sandy soil. At greater temperatures (600 and 650°C), no effect of duration was found. For the silt loam soil, LOI values increased with duration for each temperature, which was attributed to SWL. The SOM to SOC conversion factor decreased strongly with temperature at an ignition duration of 3hours from 0.70 (350°C) to 0.57 (500°C) and stabilized around 0.55 between 550 and 650°C, indicating that at temperatures ≥550°C all SOM had been removed. The clay correction factor for SWL increased from 0.01 to 0.09 as the temperature of ignition increased from 350 to 650°C. To minimize within-batch LOI variation we recommend a standard ignition duration of 3hours, tray turning at half-time, a sample mass ≥20g and temperatures equal to or greater than 550°C. To avoid over-estimates of SOM through structural water loss, the presented SWL correction procedure should always be applied.

White clover content and grassland productivity in simulated grazing systems
Eekeren, N.J.M. van; Hoogsteen, M.J.J. ; Deru, J.G.C. ; Wit, J. de; Lantinga, E.A. - \ 2015
white clover content, stocking, persistence, production, high output dairy systems
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