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.

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    We will mail you new results for this query: keywords==arable soils
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Klassenindelingen voor de fosfaattoestand van de bodem, ten behoeve van de afleiding van fosfaatgebruiksnormen
Oenema, O. ; Mol, J.P. ; Voogd, J.C.H. ; Ehlert, P.A.I. ; Velthof, G.L. - \ 2016
Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2743) - 39 p.
bodem - fosfaten - graslanden - bouwland - akkergronden - graslandgronden - soil - phosphates - grasslands - arable land - arable soils - grassland soils
In 2006 is het stelsel van gebruiksnormen voor stikstof en fosfaat ingevoerd in de Nederlandse landbouw om de uit- en afspoeling van stikstof en fosfaat vanuit de landbouw naar grondwater en oppervlaktewater te verminderen. In 2010 zijn de gebruiksnormen voor fosfaat gedifferentieerd naar de fosfaattoestand van de bodem. Daarbij worden vier klassen voor de fosfaattoestand van de bodem onderscheiden, namelijk arm, laag, neutraal en hoog. De grenzen tussen de klassen worden bepaald via een bepaling van het Pw-getal (voor bouwland) en het P-AL-getal (voor grasland). In 2015 heeft de Commissie Deskundigen Meststoffenwet (CDM) voorgesteld om de fosfaattoestand te bepalen op basis van een gecombineerde indicator, namelijk P-CaCl2 en het P-AL-getal, omdat een gecombineerde indicator in theorie een betere voorspelling geeft van de fosfaattoestand, en de gecombineerde indicator reeds in de praktijk en voor de bemestingsadviezen van grasland en maisland wordt toegepast. Ook speelt een rol dat het Pw-getal door verschillende analyselaboratoria niet meer wordt bepaald. In onderhavig rapport worden voor de gecombineerde indicator klassengrenzen afgeleid voor de fosfaattoestand van de bodem. Daarbij is gebruikgemaakt van een grote database (ruim 55.000 monsters) en van statistische analyses om een klassenindeling gebaseerd op het Pw-getal voor bouwland en op het P-AL-getal voor grasland om te rekenen naar een klassenindeling voor de gecombineerde indicator P-CaCl2 en het P-AL-getal. Verschillende varianten zijn voorgesteld. Effecten van de varianten op fosfaatplaatsingsruimte zijn verkend.
Instructie en werkbladen veldpracticum perceelvariatie Bodem
Schans, D.A. van der - \ 2014
Lelystad : PPO AGV (PPO rapporten 634) - 18
onderwijsmaterialen - perceelsvorm (landbouwkundig) - perceelsgrootte (landbouwkundig) - akkergronden - precisielandbouw - bodemvariabiliteit - agrarisch onderwijs - resource materials - field shape - field size - arable soils - precision agriculture - soil variability - agricultural education
Leren waarnemen en weergeven van bodemeigenschappen Bodemvariatie binnen een perceel in kaart brengen Inzicht krijgen in beperkingen/tekortkomingen van de grond voor optimaal gebruik. Opsporen van mogelijkheden om beperkingen van de grond op te heffen.
Effects of slurry from sulfadiazine- (SDZ) and difloxacin- (DIF) medicated pigs on the structural diversity of microorganisms in bulk and rhizosphere soil
Reichel, R. ; Rosendahl, I. ; Peeters, E.T.H.M. ; Focks, A. ; Groeneweg, K.J.I. ; Bierl, R. - \ 2013
Soil Biology and Biochemistry 62 (2013). - ISSN 0038-0717 - p. 82 - 91.
microbial-community structure - gradient gel-electrophoresis - organic-matter - antibiotic sulfadiazine - agricultural soils - arable soils - manure - nitrogen - bacteria - impact
Conventional farming still consumes considerable amounts of antibiotics such as sulfadiazine (SDZ) or difloxacin (DIF) to protect livestock from infectious diseases. Consequently, slurries from medicated animals are applied to arable soils. Antibiotics, co-applied with pig slurry, are increasingly reported to change soil microbial community structures in un-rooted bulk soil. The effects in rhizosphere soil, as well as the medication-derived direct and indirect effects of an altered slurry composition are poorly investigated. We evaluated the response of microorganisms to slurry of SDZ- and DIF-medicated pigs in a 63-d mesocosm experiment, considering the natural complexity of a typical agricultural pig slurry amendment and developing Zea mays L. root systems. Slurry-derived fecal bacteria were still present in mesosocosm soil 14 days after amendment. Medication with DIF and SDZ further altered the molecular-chemical pattern of the pig slurry, confounding the precise antibiotic effect. This has to be considered when investigating antimicrobial effects under ecological relevant conditions. Effects on the microbial community in mesocosm bulk soil widely matched results from previous studies on directly spiked soil. Effects were also found in the mesocosm rhizosphere soil, but not more pronounced than in bulk soil. This was also verified under laboratory conditions after application of artificially SDZ-spiked control slurry.
Bodem niet de black box die het volgens velen is. interview met G. Korthals
Korthals, G.W. ; Dwarswaard, A. - \ 2012
BloembollenVisie 2012 (2012)260. - ISSN 1571-5558 - p. 32 - 33.
bodemweerbaarheid - bodemvruchtbaarheid - bodembeheer - landbouwkundig onderzoek - akkergronden - proeven - ziektebestrijdende teeltmaatregelen - soil suppressiveness - soil fertility - soil management - agricultural research - arable soils - trials - cultural control
BloembollenVisie wijdt een serie aan bodemweerbaarheid, bodemvruchtbaarheid en bodemleven. In deze aflevering is het woord aan bodemecoloog Gerard Korthals, werkzaam bij PPO AGV in Lelystad.
De verbindende kracht van landgoed Junne
Greijdanus, A. ; Dijkhuizen, A. ; Janssen, J.A.M. ; Stobbelaar, D.J. - \ 2012
De Levende Natuur 113 (2012)5. - ISSN 0024-1520 - p. 262 - 262.
natuurbeheer - landgoederen - overijssel - akkerranden - akkergronden - natuurgebieden - achterhoek - nature management - estates - field margins - arable soils - natural areas
Bevat: bijdragen van Andrea Greijdanus en Afke van Dijkhuizen: de verbindende kracht van landgoed Junne. Bijdrage van Maxime van der Heiden, Rik Hogeling en Olaf van der Geest: Optimalisering van het akkerbeheer in Montferland
Specific features of the ecological functioning of urban soils in Moscow and Moscow oblast
Vasenev, V.I. ; Ananyeva, N.D. ; Makarov, O.A. - \ 2012
Eurasian Soil Science 45 (2012)2. - ISSN 1064-2293 - p. 194 - 205.
microbial biomass carbon - land-use change - organic-carbon - metabolic quotient - forest soils - arable soils - ecosystems - ratios - qco2
Urban soils (constructozems) were studied in Moscow and several cities (Dubna, Pushchino, and Serebryanye Prudy) of Moscow oblast. The soil sampling from the upper 10-cm-thick layer was performed in the industrial, residential, and recreational functional zones of these cities. The biological (the carbon of the microbial biomass carbon, Cmic and the microbial (basal) respiration, BR) and chemical (pHwater and the contents of Corg, heavy metals, and NPK) indices were determined in the samples. The ratios of BR to Cmic (the microbial respiration quotient, qCO2) and of Cmic to Corg were calculated. The Cmic varied from 120 to 738 µg C/g soil; the BR, from 0.39 to 1.94 µg CO2-C/g soil per hour; the Corg, from 2.52 to 5.67%; the qCO2, from 1.24 to 5.28 µg CO2-C/mg Cmic/g soil per h; and the Cmic/Corg, from 0.40 to 1.55%. Reliable positive correlations were found between the Cmic and BR, the Cmic and Cmic/Corg, and the Cmic and Corg values (r = 0.75, 0.95, and 0.61, respectively), as well as between the BR and Cmic/Corg values (r = 0.68). The correlation between the Cmic/Corg and qCO2 values was negative (r = -0.70). The values of Cmic, BR, Corg, and Cmic/Corg were found to correlate with the ammonium nitrogen content. No correlative relationships were revealed between the determined indices and the climatic characteristics. The principal component analysis described 86% of the variances for all the experimental data and clearly subdivided the locations of the studied soil objects. The ANOVA showed that the variances of Cmic, Corg, and BR are controlled by the site location factor by 66, 63, and 35%, respectively. The specificity of the functioning of the anthropogenic soils as compared with their natural analogues was clearly demonstrated. As shown in this study, measurable biological indices might be applied to characterize the ecological, environmental-regulating, and productive functions of soils, including urban soils
Nitrogen Mineralization in Soils Related to Initial Extractable Organic Nitrogen: Effect of Temperature and Time
Bregliani, M. ; Ros, G.H. ; Temminghoff, E.J.M. ; Riemsdijk, W.H. van - \ 2010
Communications in Soil Science and Plant Analysis 41 (2010)11. - ISSN 0010-3624 - p. 1383 - 1398.
n-mineralization - agricultural soils - microbial biomass - sandy soils - cacl2 extraction - arable soils - matter - fractions - carbon - electroultrafiltration
An important source of nitrogen (N) for crops is mineralization of soil organic matter during the growing season. Awareness is growing that dissolved organic nitrogen (DON) plays an important role in mineralization and plant uptake. We studied the influence of temperature and time on extractable organic nitrogen (EON) levels, which is a measure of DON, and their relationship with N mineralization. Aerobic incubation experiments were conducted in the laboratory for five soils at different temperatures (4 20, and 30 °C) and different time intervals with optimal water content (60% of its water-holding capacity). Net N mineralization ranged between 14 and 155 mg kg-1 within 84 days and was correlated with the initial amount of EON. Net N mineralization among the soils, time, and incubation temperatures was linearly related to the square root of time multiplied by temperature, with mineralization rate k being independent of time and temperature. Because initial EON values were also related to these kvalues, we were able to describe the net N mineralization at different temperatures based on an analysis of initial EON. Preliminary validation with results from pot experiments in the literature suggests that the approach is promising, although the proposed model needs to be calibrated with more soils
The dynamics of ground-dwelling spiders in two six years crop rotation systems: sources and sinks?
Alebeek, F.A.N. van; Broek, R.C.F.M. van den; Kamstra, J.H. - \ 2008
spinnen - araneae - akkergronden - randen - spinning - arable soils - tipburn
Verslag van een zesjarig onderzoek, waarin onderzoek op akkers werd gedaan om te weten te komen of akkerranden als bron of poel fungeren voor spinnen
The dynamics of carabid beetles in two six years crop rotation systems: sources and sinks?
Alebeek, F.A.N. van; Broek, R.C.F.M. van den; Kamstra, J.H. - \ 2008
carabidae - akkergronden - gewasbescherming - arable soils - plant protection
Hierbij de resultaten van een zesjarige studie naar twee landbouwsystemen. In de studie wordt onderzocht of akkerranden een rol spelen bij het overbrengen van loopkevers
Fungal biomass in pastures increases with age and reduced N input.
Vries, F.T. de; Bloem, J. ; Eekeren, N.J.M. van; Brussaard, L. ; Hoffland, E. - \ 2007
Soil Biology and Biochemistry 39 (2007)7. - ISSN 0038-0717 - p. 1620 - 1630.
soil microbial community - botanically diverse haymeadows - organic-matter - white clover - nitrogen mineralization - perennial ryegrass - land abandonment - dairy manure - arable soils - management
Previous studies have shown that soil fungal biomass increases towards more natural, mature systems. Shifts to a fungal-based soil food web have previously been observed with abandonment of agricultural fields and extensification of agriculture. In a previous field experiment we found increased fungal biomass with reduced N fertilisation. Here, we explore relationships between fungi, bacteria, N input and grassland age on real dairy farms in the Netherlands. We hypothesised that also in pastures that are still in production there is a negative relationship between fungal biomass and fertilisation, and that fungal biomass increases with grassland age in pastures that are still in production. We expected the fungal/bacterial biomass ratio to show the same responses, as this ratio has often been used as an indicator for management changes. We sampled 48 pastures from eight organic dairy farms. Sites differed in age and fertilisation rate. We determined fungal and bacterial biomass, as well as ergosterol (a fungal biomarker). Fungal and bacterial biomass and ergosterol, showed a negative relationship with N application rate, and correlated positively with organic matter percentage. In old pastures, fungal biomass and ergosterol were higher than in younger pastures. Because bacterial biomass responded in the same way as fungal biomass, the F/B ratio remained constant, and can therefore¿in our data set¿not be used as an indicator for changing management. We conclude that the changes in fungal and bacterial biomass were driven by changes in organic matter quality and quantity. The negative relationship we found between N application rate and fungal biomass adds to earlier work and confirms the presence of this relationship in pastures with relatively small differences in management intensities. Earlier studies on shifts in fungal biomass focused on ex-agricultural fields or restoration projects. Here we show that fungal biomass is also higher in older agricultural pastures.
Precise soil management as a tool to reduce CH4 and N2O emissions from agricultural soils
Mosquera Losada, J. ; Hol, J.M.G. ; Rappoldt, C. ; Dolfing, J. - \ 2007
Lelystad : Animal Sciences Group (Report / Animal Sciences Group 28) - 42
distikstofmonoxide - emissie - broeikasgassen - bodemverdichting - rijspoorverdichtingen - mestgiften - akkergronden - landbouwgrond - akkerbouw - bemesting - nitrous oxide - emission - greenhouse gases - soil compaction - tractor pans - dressings - arable soils - agricultural land - arable farming - fertilizer application
Soil compaction stimulates the emission of nitrous oxide (N2O) and methane (CH4) from agricultural soils. N2O and CH4 are potent greenhouse gases, with a global warming potential respectively 296 times and 23 times greater than CO2.. Agricultural soils are an important source of N2O. Hence there is much interest in a systematic evaluation of management options that are available to minimize agricultural greenhouse gas emissions, in particular N2O soil emissions. One such option would be to minimize soil compaction due to the use of heavy machinery. Soil compaction in arable land is relatively general. In this report it is discussed that emissions of N2O and CH4 from an arable field where soil compaction was minimized through application of the so-called ‘riding track’ (rijpaden) system was substantially lower than from plots where a traditional system was used. Laboratory experiments were used to underpin these observations. From these observations we developed a simple calculation model that relates N2O emission to gas filled pore space and soil respiration as input parameters. We suggest implementing the ‘riding track’ system on clay rather than sand as farmers benefit from lower compaction in terms of lower risk of compaction and better accessibility of fields for work. The potential reduction of the N2O emission from arable farming in the Netherlands is estimated at ~169 ton N2O-N per year
Phosphorus movement and speciation in a sandy soil profile after long-term animal manure applications
Koopmans, G.F. ; Chardon, W.J. ; McDowell, R.W. - \ 2007
Journal of Environmental Quality 36 (2007)1. - ISSN 0047-2425 - p. 305 - 315.
nuclear-magnetic-resonance - p-31 nmr-spectroscopy - organic phosphorus - arable soils - inositol hexaphosphate - sequential extraction - broiler litter - amended soils - dairy-cattle - plasmid dna
Long-term application of phosphorus (P) with animal manure in amounts exceeding removal with crops leads to buildup of P in soil and to increasing risk of P loss to surface water and eutrophication. In most manures, the majority of P is held within inorganic forms, but in soil leachates organic P forms often dominate. We investigated the mobility of both inorganic and organic P in profile samples from a noncalcareous sandy soil treated for 11 yr with excessive amounts of pig slurry, poultry manure, or poultry manure mixed with litter. Solution 31P nuclear magnetic resonance spectroscopy was used to characterize NaOH-EDTA-extractable forms of P, corresponding to 64 to 93% of the total P concentration in soil. Orthophosphate and orthophosphate monoesters were the main P forms detected in the NaOHEDTA extracts.A strong accumulation of orthophosphate monoesters was found in the upper layers of the manure-treated soils. For orthophosphate, however, increased concentrations were found down to the 40- to 50-cm soil layers, indicating a strong downward movement of this P form. This was ascribed to the strong retention of orthophosphate monoesters by the solid phase of the soil, preventing orthophosphate sorption and facilitating downward movement of orthophosphate. Alternatively, mineralization of organic P in the upper layers of the manure-treated soils may have generated orthophosphate, which could have contributed to the downward movement of the latter. Leaching of inorganic P should thus be considered for the assessment and the future management of the long-term risk of P loss from soils receiving large amounts of manure.
Functies van akkerranden
Alebeek, F.A.N. van - \ 2006
akkergronden - natuurbescherming - agrarisch natuurbeheer - akkerranden - arable soils - nature conservation - agri-environment schemes - field margins
Poster over met foto's over functies die akkerranden kunnen vervullen, ten behoeve van voorlichting
Natuurlijke vijanden in akkerranden : vliegende soorten (2)
PPO Praktijkonderzoek Plant en Omgeving, - \ 2006
Lelystad : Praktijkonderzoek Plant & Omgeving B.V. - 1
akkergronden - natuurlijke vijanden - insecten - akkerranden - arable soils - natural enemies - insects - field margins
Poster met informatie over het bodemleven in akkerranden. Besproken worden achtereenvolgens: gaasvliegen en hun larven, lieveheersbeestjes en hun larven en roofwantsen
Natuurlijke vijanden in akkerranden : vliegende soorten (1)
PPO Praktijkonderzoek Plant en Omgeving, - \ 2006
Lelystad : Praktijkonderzoek Plant & Omgeving B.V. - 1
natuurbescherming - akkergronden - insecten - luchtinsecten - akkerranden - nature conservation - arable soils - insects - aerial insects - field margins
Akkerranden met bloeiende kruiden bieden nectar en stuifmeel voor natuurlijke vijanden. Sluipwespen en zweefvliegen leven langer en leggen meer eieren als ze nectar kunnen eten. Gaasvliegen hebben stuifmeel nodig. Op de kruiden en grassen in akkerranden leven bovendien allerlei niet-schadelijke insecten die als prooi dienen voor deze roofvijanden. Zo kunnen zij in de lente in de akkerrand alvast grote aantallen opbouwen vóór de plagen in het gewas arriveren. Trekken ze daarna het gewas in, dan kunnen zij enorm opruiming houden onder plagen zoals bladluizen en rupsen
Natuurlijke vijanden in akkerranden : bodemfauna (2)
PPO Praktijkonderzoek Plant en Omgeving, - \ 2006
Lelystad : Praktijkonderzoek Plant & Omgeving B.V.
akkergronden - natuurlijke vijanden - insecten - bodem - bodemfauna - akkerranden - arable soils - natural enemies - insects - soil - soil fauna - field margins
Poster met informatie over bodemdieren in akkerranden. Behandeld worden: duizendpoten en hooiwagens
Natuurlijke vijanden in akkerranden : bodemfauna (1)
PPO Praktijkonderzoek Plant en Omgeving, - \ 2006
Lelystad : Praktijkonderzoek Plant & Omgeving B.V.
akkergronden - bodemfauna - natuurlijke vijanden - bodeminsecten - insecten - akkerranden - arable soils - soil fauna - natural enemies - soil insects - insects - field margins
Akkerranden vormen ’s winters een schuilplaats voor bodemdieren die in de kale akker weinig voedsel en beschutting vinden. Onder deze bodemdieren zitten belangrijke natuurlijke vijanden van insectenplagen. Deze rovers zijn niet gespecialiseerd en jagen op allerlei prooien op de grond en in planten. Zij kunnen enorm opruiming houden onder plagen zoals slakken, bladluizen en rupsen. De meeste rovers zijn ’s nachts actief, waardoor ze niet opvallen
Comparing different extraction methods for estimating phosphorus solubility in various soil types
Koopmans, G.F. ; Chardon, W.J. ; Dekker, P.H.M. ; Römkens, P.F.A.M. ; Schoumans, O.F. - \ 2006
Soil Science 171 (2006)2. - ISSN 0038-075X - p. 103 - 116.
western united-states - organic phosphorus - phosphate sorption - receiving manure - grassland soil - surface runoff - arable soils - sandy soils - netherlands - water
In areas with intensive animal livestock farming, agricultural soils are enriched with phosphorus (P). These soils exhibit an increased risk for P transfer to the sub-soil and surface water via leaching. Besides the presence of hydrological pathways between a field and surface water, P in soil solution should be studied for evaluating the environmental risk. For this purpose, soil P extraction methods can be used. In this study, we tested the relation between various extraction methods and P in soil solution, simulated by a water extraction at a soil-to-solution ratio of 1:2 (w/v) using field-moist topsoils sampled from the major Dutch soil types (noncalcareous and calcareous sand and clay, reclaimed peat, and peat). The following methods were used: Pw (1:60 [v/v] water-extractable P), 0.01 M CaCl2 (1:10 [v/v]), FeO-strip, and acid ammonium oxalate-extractable P, Al, and Fe. Phosphorus in the 1:2 water extracts was mainly present as molybdate-reactive P (MRP). Extraction methods with the highest ability to predict MRP in 1:2 water extracts across different soil types were CaCl2, Pw, and FeO-strip, the latter two normalized for [Al + Fe]ox. However, for the peat and noncalcareous clay soils, also estimation of molybdate-unreactive P (MUP) is important because MUP dominates in the 1:2 water extracts of these soils. Thus, an extraction method that only determines MRP will not suffice, and further research is needed on the environmental risk of MUP in soil solution from these soil types. The calcareous sandy soils deviated significantly from the above mentioned relationships. For this soil type, it should be tested whether a single water extraction (e.g., Pw) suffices for determining the environmental risk.
Uit de mest- en mineralenprogramma's : Nitraatconcentraties naast en onder een bufferstrook
Heinen, M. ; Beek, C.L. - \ 2005
Wageningen : Alterra (Informatieblad / Alterra 398.102) - 2
stikstof - oppervlaktewater - waterkwaliteit - akkergronden - begroeide stroken - denitrificatie - bodemchemie - fosfaatuitspoeling - mestbeleid - bemesting - nitrogen - surface water - water quality - arable soils - vegetated strips - denitrification - soil chemistry - phosphate leaching - manure policy - fertilizer application
De belasting van het oppervlaktewater met nutriënten is in veel gebieden in Nederland te hoog. De afgelopen decennia zijn verschillende brongerichte maatregelen genomen om de stikstof (N) en fosfor (P) verontreiniging te verminderen, bijvoorbeeld door aanscherping van het mestbeleid. Wat betreft de efficiëntie van verschillende maatregelen is (nog) weinig literatuur voorhanden die van toepassing is op de Nederlandse situatie. In het bijzonder kwantitatieve informatie over de effectiviteit van bufferstroken (bemestingsvrije perceelsranden) in het verminderen van N- en P-uitspoeling voor Nederlandse omstandigheden ontbreekt. Daarnaast zijn enkele modelberekeningen voor bufferstrooksituaties uitgevoerd. Om een juiste indruk te krijgen van de effectiviteit van een bufferstrook zou de vrachtbelasting van het oppervlaktewater (slootwater) gemeten moeten worden in een situatie met en een situatie zonder aanwezigheid van een bufferstrook. Dit type onderzoek is echter vrij kostbaar (zie ook 'Ten slotte'). In het kader van programma 398-II is onderzoek verricht om inzicht te krijgen in de veranderingen in N- en P-concentraties in het bovenste grondwater als functie van de tijd en afstand tot de sloot in een akkerbouwperceel (zand, vlak, ongedraineerd) met een onbemeste grasbufferstrook langs de sloot. Dergelijke veranderingen zijn het gevolg van consumerende, zoals denitrificatie en gewasopname, of eventueel producerende processen
Hulp van zweefvliegen : akkerbouwer ziet rol en nut van akkerranden : [thema] functionele agrobiodiversiteit
Noorduyn, L. ; Willemse, J. - \ 2005
Nieuwe oogst / Magazine gewas 1 (2005)3. - ISSN 1871-093X - p. 14 - 15.
natuurbescherming - biodiversiteit - vegetatiebeheer - akkergronden - gewasbescherming - natuurlijke vijanden - insectenplagen - plagenbestrijding - agrarisch natuurbeheer - agrobiodiversiteit - functionele biodiversiteit - nature conservation - biodiversity - vegetation management - arable soils - plant protection - natural enemies - insect pests - pest control - agri-environment schemes - agro-biodiversity - functional biodiversity
In 2005 lopen er twee praktijkprojecten rond functionele agrobiodiversiteit (FAB). Op Schouwen-Duivenland doet de ZLTO al enkele jaren onderzoek naar akkerranden en plaagbeheersing. In de Hoekse Waard start LTO Nederland een nieuw FAB-project. Een teler en een bedrijfsvoorlichter over hun ervaringen
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