Kruidhof, H.M., Bastiaans, L., Kropff, M.J.
Cover crops grown in the period between two main crops have potential as an important component of a system-oriented ecological weed management strategy. In late summer and autumn, the cover crop can...
Weeds often form a major problem in weakly competitive vegetable crops, particularly in low input systems. Undersown cover crops can be used to suppress weeds, but often put too high a competitive...
Undersown cover crop species introduced for weed management purposes should ideally combine adequate weed suppression with only marginal negative competitive effects on the main crop. The aim of this...
Exploiting diversity to manage weeds in agro-ecosystems (2007)
Bastiaans, L., Zhao, D.L., Baumann, D.T., Kruidhof, H.M., Kropff, M.J.
Are weed patches stable in location? Application of an explicitly two-dimensional methodology (2007)
Heijting, S., Stein, A., Kropff, M.J.
Field observations were made in three years continuous maize cultivation in the Netherlands to study the spatial pattern and stability of spatial pattern over time in agricultural weeds....
Are pre-spraying growing conditions a major determinant of herbicide efficacy? (2007)
Bastiaans, L., Kempenaar, C., Smutny, V., Kropff, M.J.
To evaluate the effect of pre-spraying growing conditions on herbicide efficacy, two years of experimentation were conducted in which Persicaria maculosa plants were exposed to different light...
Riemens, M.M., Groeneveld, R.M.W., Lotz, L.A.P., Kropff, M.J.
The effects of three different weed management strategies on the required input of hand weeding in an arable organic farming system, the weed seedbank in the soil and the emerging weed seedling...
Effects of host plant genotype and seedbank density on Striga reproduction (2006)
Rodenburg, J., Bastiaans, L., Kropff, M.J.
Prevention of seed input to the seedbank of Striga hermonthica-infested fields is an important objective of Striga management. In three consecutive years of field experimentation in Mali, Striga...
Characterization of host tolerance to Striga hermonthica (2006)
Rodenburg, J., Bastiaans, L., Kropff, M.J.
One of the most promising control options against the parasitic weed Striga hermonthica is the use of crop varieties that combine resistance with high levels of tolerance. The aim of this study was...
Bastiaans, L., Harbinson, J., Kempenaar, C., Kropff, M.J.
The influence of the acetolactate synthase inhibitor metsulfuron-methyl on the operation of the photosynthetic apparatus was examined on 4-weeks-old climate chamber-grown Solanum nigrum plant. To...
Bastiaans, L., Harbinson, J., Kempenaar, C., Kropff, M.J.
The influence of the acetolactate synthase inhibitor metsulfuron-methyl on the operation of the photosynthetic apparatus was examined on 4-weeks-old climate chamber-grown Solanum nigrum plant. To...
Bastiaans, L., Harbinson, J., Kempenaar, C., Kropff, M.J.
The influence of the acetolactate synthase inhibitor metsulfuron-methyl on the operation of the photosynthetic apparatus was examined on 4-weeks-old climate chamber-grown Solanum nigrum plant. To...
Samaké, O., Stomph, T.J., Kropff, M.J., Smaling, E.M.A.
Increasing population density and food needs in the Sahel are major drivers behind the conversion of land under natural vegetation to arable land. Intensification of agriculture is a necessity for...
Bastiaans, L., Harbinson, J., Kempenaar, C., Kropff, M.J.
The influence of the acetolactate synthase inhibitor metsulfuron-methyl on the operation of the photosynthetic apparatus was examined on 4-weeks-old climate chamber-grown Solanum nigrum plant. To...
Bastiaans, L., Kropff, M.J., Harbinson, J., Kempenaar, C.
The application of the acetolactate synthase (ALS)¿inhibiting herbicide metsulfuron on greenhouse- and field-grown black nightshade and greenhouse-grown ladysthumb resulted in progressive inhibition...
Samaké, O., Smaling, E.M.A., Kropff, M.J., Stomph, T.J., Kodio, A.
The article provides a quantitative analysis of temporal variation in fallow characteristics, and spatial variation in fallow distribution, pearl millet (Pennisetum glaucum) yield and soil fertility...
Samaké, O., Smaling, E.M.A., Kropff, M.J., Stomph, T.J., Kodio, A.
The article provides a quantitative analysis of temporal variation in fallow characteristics, and spatial variation in fallow distribution, pearl millet (Pennisetum glaucum) yield and soil fertility...
Like elsewhere in the Sahel, actual rice yields (3-5 t ha-1) are far below yield potential (±8 t ha-1) in an irrigation scheme in central southern Mauritania. Earlier studies showed that yields are...
Role of crop physiology in predicting gene-to-phenotype relationships (2004)
Yin, X., Struik, P.C., Kropff, M.J.
Robust crop physiological modelling could become an essential tool in explaining crop behaviour using insights from functional genomics. Current crop models can predict crop performance over a range...
Baumann, D.T., Bastiaans, L., Kropff, M.J.
Intercropping leek (Allium porrum L.) and celery (Apium graveolens L.) was recognized as an option to reduce growth and reproductive potential of weeds while maintaining yield and product quality of...
Method for predicting selective uprooting by mechanical weeders from plant anchorage (2004)
Kurstjens, D.A.G., Kropff, M.J., Perdok, U.D.
Reliable mechanical weed control requires knowledge of the achievable levels of weed control and crop damage when using certain implements in specific conditions. Quantitative methods that use weed,...
S. Haefele, M. Ould Isselmou, M.J. Kropff
The objective of this study was to identify to what extent rice productivity problems are caused by soil quality problems (soil alkalinity) and to what extent by sub-optimal crop management. The...
S. Haefele, M. Ould Isselmou, M.J. Kropff
The objective of this study was to identify to what extent rice productivity problems are caused by soil quality problems (soil alkalinity) and to what extent by sub-optimal crop management. The...
On approaches and applications of the Wageningen crop models (2003)
Leffelaar, P.A., Kropff, M.J., Bastiaans, L., Goudriaan, J.
A total of 74 farms were selected from Machakos, Mwingi and Makueni districts in Kenya, using participatory techniques and classified in three categories on the basis of soil fertility management...
Crop modeling, QTL mapping, and their complementary role in plant breeding (2003)
Yin, X., Stam, P., Kropff, M.J.
Received for publication May 1, 2001. Crop modelers and geneticists have developed a vision of their roles in plant breeding from their own perspective. However, to improve breeding efficiency,...
Schröder, J.J., Kropff, M.J., Grashoff, C., Booij, R.
In order to improve crop yields but limit phosphorus (P) accumulation in organic farming systems, insight into the effects of organic nitrogen (N) management on crop yield is required. After...
Wopereis, M.C.S., Haefele, S., Ould Isselmou, W., Kropff, M.J.
The objective of this study was to identify to what extent rice productivity problems are caused by soil quality problems (soil alkalinity) and to what extent by sub-optimal crop management. The...
Seven ways to improve the selective ability of mechanical intra-row weeders (2002)
Kurstjens, D.A.G., Bleeker, P.O., Kropff, M.J., Perdok, U.D.
Yin, X., Chasalow, S.D., Stam, P., Kropff, M.J., Dourleijn, C.J., Bos, I., ...
Genes contributing to the quantitative variation of a complex crop trait can be numerous. However, using existing approaches, the number of quantitative trait loci (QTL) detected for a trait is...
Optimizing grain yields reduces CH4 emissions from rice paddy fields (2002)
Kropff, M.J., Wassmann, R., Lantin, R.S., Aduna, E., ...
Microbial production in anoxic wetland rice soils is a major source of atmospheric CH4, the most important non-CO2 greenhouse gas. Much higher CH4 emissions from well managed irrigated rice fields in...
Hammer, G.L., Kropff, M.J., Sinclair, T.R., Porter, J.R.
Crop modelling has evolved over the last 30 or so years in concert with advances in crop physiology, crop ecology and computing technology. Having reached a respectable degree of acceptance, it is...
Geertsema, W., Opdam, P.F.M., Kropff, M.J.
In agricultural landscapes many plant species are limited to the network of landscape elements that are not used for agricultural production. This habitat is fragmented in space and time due to...
Lotz, L.A.P., Bastiaans, L., Franke, A.C., Smid, H.G., Groeneveld, R.M.W., ...
This paper tests the hypothesis that increased soil nitrogen supply reduces the growth of late-emerging weeds in wheat and potato by enhancing canopy leaf area development and thereby reducing the...
Geertsema, W., Opdam, P.F.M., Kropff, M.J.
In agricultural landscapes many plant species are limited to the network of landscape elements that are not used for agricultural production. This habitat is fragmented in space and time due to...
Baumann, D.T., Bastiaans, L., Goudriaan, J., Kropff, M.J.
An eco-physiological model was used to improve understanding of interplant competition based on physiological, morphological and phenological processes. The model was parameterised based on...
Competition for light and nitrogen among grassland species: a simulation analysis (2001)
1. A plant competition model to analyse the competition among perennial grassland species was developed. It was used to find out whether complex perennial competition processes could be simulated...
Optimum rice yield under short-term cover crop fallow systems (2001)
Akanvou, R.K., Becker, M., Kropff, M.J., Bastiaans, L., Dea, G.
The performance of a model for simulating increase in leaf area index (L) was evaluated for potato (Solanum tuberosum L.) and wheat (Triticum aestivum L.) cultivars across environments (years and...
A model analysis of yield differences among recombinant inbred lines in barley (2001)
Yin, X.Y., Kropff, M.J., Goudriaan, J., Stam, P.
Crop models can support plant breeding if they can predict differences in performance of different genotypes. In this study, the ability of a crop model to explain yield differences among genotypes...
Akanvou, R., Bastiaans, L., Kropff, M.J., Goudriaan, J., Becker, M.
Legume cover crops can be successfully used as intercrop or relay crops in low-input farming systems. To select appropriate species for intercropping, experiments were conducted in the savannah zone...
Systems approaches for the design of sustainable agro-ecosystems (2001)
Kropff, M.J., Bouma, J., Jones, J.W.
The complexity of agricultural systems and the need to fulfil multiple objectives in sustainable agro-ecosystems call for interdisciplinary analyzes and input from a wide variety of disciplines in...
The impact of uprooting and soil-covering on the effectiveness of weed harrowing (2001)
Kurstjens, D.A.G., Kropff, M.J.
The impact of uprooting and covering plants on mortality and growth reduction was investigated in the laboratory using Lolium perenne L. and Lepidium sativum L. (harrowed 3-4 days after emergence)...