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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Scaling and institutionalization within agricultural innovation systems : the case of cocoa farmer field schools in Cameroon
Muilerman, Sander ; Wigboldus, Seerp ; Leeuwis, Cees - \ 2018
International Journal of Agricultural Sustainability 16 (2018)2. - ISSN 1473-5903 - p. 167 - 186.
Africa - agricultural extension - Cameroon - cocoa - innovation
The farmer field school (FFS) concept has been widely adopted, and such schools have the reputation of strengthening farmers’ capacity to innovate. Although their impact has been studied widely, what is involved in their scaling and in their becoming an integral part of agricultural innovation systems has been studied much less. In the case of the Sustainable Tree Crops Programme in Cameroon, we investigate how a public–private partnership (PPP) did not lead to satisfactory widespread scaling in the cocoa innovation system. We build a detailed understanding of the key dimensions and dynamics involved and the wider lessons that might be learned regarding complex scaling processes in the context of agricultural innovation systems. Original interview data and document analysis inform the case study. A specific analytical approach was used to structure the broad-based exploration of the qualitative dataset. We conclude that scaling and institutionalization outcomes were impeded by: the lack of an adaptive approach to scaling the FFS curriculum, limited investments and genuine buy-in by extension actors, a failure to adapt the management approach between the pilot and the scaling phase, and the lack of strategic competencies to guide the process. Our findings support suggestions from recent literature that pilots need to be translated and adapted in light of specific contextual and institutional conditions, rather than approached as a linear rolling-out process. These findings are relevant for the further spread of similar approaches commonly involved in multi-stakeholder scaling processes such as innovation platforms.
Agricultural extension, technology adoption and household food security : evidence from DRC
Santos Rocha, Jozimo - \ 2017
University. Promotor(en): Erwin Bulte, co-promotor(en): Marrit van den Berg. - Wageningen : Wageningen University - ISBN 9789463434485 - 231
agricultural extension - technology - adoption - food security - households - development economics - agricultural production - knowledge transfer - congo democratic republic - landbouwvoorlichting - technologie - adoptie - voedselzekerheid - huishoudens - ontwikkelingseconomie - landbouwproductie - kennisoverdracht - democratische republiek kongo

In this thesis, I use experimental and quasi-experimental data from 25 villages and a total of 1,105 farmers from eastern DRC to investigate the relationship among agricultural training, the adoption of agricultural technologies, crop productivity, and household food insecurity and dietary diversity. I present evidence that contributes to narrow the gap in the literature on the role of input subsidies fostering small-scale farmers' uptake of productivity-enhancing technologies, how farmer field school and farmer-to-farmer trainings affect the adoption of agricultural technologies, how F2F training may reduce the costs of FFS implementation, how adoption materializes on yields of food crops, and how training through the adoption of improved agricultural technologies impacts household food insecurity and the diet diversification of target households.

As a complement to econometric evidence and in order to understand the main findings, I also discuss behavioral features and farmer driven initiatives which somehow condition these impacts. Throughout the four main chapters, I identify practical implications that are highly important for the design and implementation of new programs and policies aimed to address agricultural productivity issues and reduce household food insecurity. In Chapter 1 I develop a general introduction to the research which discusses the evolution of agricultural extension in the last few decades, and describe FFS and F2F training methodologies. Chapter 2 provides a detailed description of the project intervention, technologies promoted, research settings and the data collection process. In Chapter 3, I report the results of an experimental study that analyses the impact of one-shot input starter packs on the adoption of productivity-enhancing complementary practices, which have the potential to maximize the impact of starter pack inputs. Additionally, I assess the levels of persistence on farmers’ use of improved crop seeds which are included in the starter packs. Overall, I find no evidence of starter packs’ impact on small-scale farmers’ adoption of productivity-enhancing technologies. Similarly, the levels of persistence regarding the use of seeds following the delivery of starter packs were not significant. These results are consistent with studies that have found minimal or no persistence on the use of inputs following the provision of subsidies, including Duflo, Kremer et al. (2011). The limited impact that starter packs had on yields in the first year may logically explain that farmers refrained from using improved seeds subsequently because the inputs are not economically attractive.

Chapter 4 studies the effectiveness of knowledge transmission from farmers trained in FFS through farmer-to-farmer training (F2F), which could potentially result in lower extension costs and higher impacts. I find that FFS training has a higher impact than F2F training in the first period, but the magnitude of the treatment effect in the second period is not statistically different between the two training methods. I argue that the dissemination of technologies promoted in FFS groups can well be formalized through farmer-to-farmer deliberate training attached to the FFS approach. Given the low costs of F2F training compared to FFS, the introduction of F2F training may substantially alleviate a major constraint to the large-scale introduction of FFS as a training method, its high costs.

In Chapter 5, I study the impact of farmer’s participation in FFS and F2F training on small-scale agricultural productivity. A multi-crop yield-index and the yields of cassava were used as impact indicators. The results indicate that both FFS and F2F trainings contribute to a significant increase in farmers’ yields, especially in the second period when the magnitude of the effect substantially increased. We also learned that the effect size does not differ between the two training approaches in neither period, suggesting that F2F communications are a suitable alternative or complement to FFS training. While the chapter was unable to confirm if training materializes in higher yields through technology adoption, I argue that in the context of the sample the adoption of productivity-enhancing practices and inputs are likely the most important impact mechanism.

I also study the relationship between agricultural training, the adoption of improved technologies and household food insecurity. I find that farmers’ participation in agricultural trainings has a positive effect, through the adoption of improved technologies, on improvements in household dietary diversity (HDDS). Nonetheless, the impact on household access to food (HFIAS) is less evident. These results suggest that FFS/F2F training can well reduce household food insecurity, which is mostly achieved through the adoption of improved agricultural technologies. Yet, there are farm and household specific factors which constrain how training impacts technology adoption and how adoption affect household food insecurity and diet diversification. In Chapter 7, I synthesize the results of the four main chapters and articulate the sequence of results from training to adoption to productivity to food security.

Scaling service delivery in a failed state : cocoa smallholders, Farmer Field Schools, persistent bureaucrats and institutional work in Côte d’Ivoire
Muilerman, Sander ; Vellema, Sietze - \ 2017
International Journal of Agricultural Sustainability 15 (2017)1. - ISSN 1473-5903 - p. 83 - 98.
Africa - agricultural extension - bureaucracy - cocoa sector - Côte d’Ivoire - Farmer Field Schools - governance

The increased use of sustainability standards in the international trade in cocoa challenges companies to find effective modes of service delivery to large numbers of small-scale farmers. A case study of the Sustainable Tree Crops Program targeting the small-scale cocoa producers in Côte d’Ivoire supplying international commodity markets shifts attention from mechanisms of private governance to the embedding of service delivery in the institutional dynamics of the state. It demonstrates that, despite a recent history of violent conflict and civil unrest, the introduced Farmer Field Schools programme achieved a surprising scale in terms of numbers and geographical spread. The analysis of this outcome combines political science and anthropological studies of effective and developmental elements in the state with the interest in institutional work found in organization science. The scaling of a new form of service delivery is explained by the skilful practices of institutional work by managers of a public–private partnership. They have been professionally associated with the sector for a long time and had the capacity to embed new forms of service delivery in persistent pockets of bureaucratic effectiveness in a failed state.

Kusheh, na minem Fatu, en mi na koko farmer Hello, I am Fatu and I am a cocoa farmer : a Digital Farmer Field School for training in cocoa production and certification in Sierra Leone
Witteveen, L.M. ; Goris, Margriet ; Lie, R. ; Ingram, V.J. - \ 2016
Wageningen : Wageningen UR Science Shop (Report /Wageningen UR, Science Shop 330) - ISBN 9789462577657 - 44 p.
agricultural extension - cocoa - farmers - information technology - sierra leone - landbouwvoorlichting - cacao - boeren - informatietechnologie
This document reports on the development of a prototype Digital Farmer Field School (DFFS) called Kusheh, na minem Fatu, en mi na koko farmer (“Hello, I am Fatu and I am a cocoa farmer”). The DFFS provides an ICT-based alternative to traditional agricultural extension. More specifically, it offers a tablet-based substitute for the face-to-face certification training for cocoa farmers in Sierra Leone. The fact that gatherings of more than five people at a time were not allowed as a consequence of the Ebola outbreak triggered the development of the digital alternative to group training for cocoa farmers.
Network formation, learning and innovation in multi-stakeholder research projects : experiences with Adaptive Research and Learning Alliances in rice farming communities in Southeast Asia
Flor, R.J. - \ 2016
University. Promotor(en): Cees Leeuwis, co-promotor(en): Harro Maat; Grant Singleton. - Wageningen : Wageningen University - ISBN 9789462576650 - 230 p.
learning activities - adult learning - learning - social networks - education - agricultural education - rice - farming - agricultural extension - south east asia - cambodia - leeractiviteiten - volwassenenstudie - leren - sociale netwerken - onderwijs - agrarisch onderwijs - rijst - landbouw bedrijven - landbouwvoorlichting - zuidoost-azië - cambodja

Mounting pressure on research organizations to achieve sustainable development outcomes from research has pushed them to use multi-stakeholder approaches. Insights are missing however, on how these influence social, technical, and institutional change, as well as what outcomes emerge from these. The thesis is an examination of the enactment of multi-stakeholder approaches, questioning how and to what extent Adaptive Research (AR) and Learning Alliance (LA) approaches influence socio-technical innovation in rice farming communities. Four case studies of research and development projects that employed the approaches in rice farming communities were elaborated in this thesis.

AR implementation in Indonesia (chapter 2), showed how AR fast-tracked technical adaptations and built upon the improvisational capacities of farmers. AR monitoring however, rendered invisible the adaptations required on the social aspect. Simultaneous social, technical, and institutional redesign was limited.

A case of LA implemented at national level engaged a network that changed and expanded after three years to include diverse actors (chapter 3). There were points where implementation (mis)aligned with assumptions from project implementers and from conceptual literature of the LA approach. The network influenced change at community level by engaging small groups that made reconfigurations on the technologies and the social arrangements for these (chapter 4). A community-level LA in Myanmar was also found to stimulate a self-organized learning process towards innovation for flatbed dryer technology (chapter 5).

A case where a project used AR only versus AR with LA in Myanmar (chapter 6), revealed differing networks, learning processes, and outcomes in terms of learning agenda. The involvement of a wider network resulted in a broader set of activities, which were initiatives outside the original plans of the project. The learning activities were not only about technologies but also included experimentations on supportive environment for access and use of the technologies.

This thesis therefore demonstrates that project actors implement AR and LA approaches through a range of translations in multiple contexts. These imply varied interactions in different types of networks. Such interactions triggered varied learning processes and thus influenced different planned or emergent outcomes. Both approaches have potential to catalyze innovation in farming communities; however, outcomes on adoption numbers provide a caveat that these approaches are not silver bullets that guarantee technology adoption. Instead, implementation that facilitates effective learning processes, and monitoring that flags where projects could support emergent outcomes, can help implementers improve their contributions to development in farming communities.

Empty pockets, empty ponds? Disadoption of water harvesting technologies in Ethiopia
Wakeyo, M.B. ; Gardebroek, C. - \ 2015
Journal of Arid Environments 120 (2015). - ISSN 0140-1963 - p. 75 - 86.
supplemental irrigation - agricultural extension - semiarid region - adoption - systems - productivity - africa - impact - china - soil
This study analyses disadoption of water harvesting technologies in Ethiopia where the average disadiption rate in the sample areas is as high as 42%. Given that Ethiopia is a drought-prone country with 95% of its crop production being rain-fed, such a high disadoption rate for irrigation technologies is surprising and urges investigation. Using panel data on 332 Ethiopian farm households collected in 2005 and 2010 we estimate a logit model to identify factors underlying disadoption. We find farm-household, economic, technology-specific, and natural condition variables that relate to disadoption. Mainly, shortage of plastic-sheets, altitude, and distance to market increase disadoption whereas education, experience with water harvesting (learning-by-doing), farm profit, availability of family labour, access to credit, ease of selling output, growing perennial crops, and distance from natural water sources decrease the probability of disadiption. There is no evidence that malaria has a significant effect on disadoption. Based on these findings, improved supply of plastic sheets and motor pumps, and advise to afmers on appropriate crops, credit and improved market accesses could ontribute to decreasing disadoption of water harvesting technologies.
Mobiles for agricultural development : exploring trends, challenges and policy options for the Dutch government
Danes, M.H.G.I. ; Jellema, A. ; Janssen, S.J.C. ; Janssen, H. - \ 2014
Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2501) - 25
landbouwontwikkeling - mobiele toepassingen - kleine landbouwbedrijven - informatieverspreiding - landbouwvoorlichting - ontwikkelingsbeleid - nederland - agricultural development - mobile applications - small farms - diffusion of information - agricultural extension - development policy - netherlands
Currently many initiatives for m-Agri Apps for smallholder development are taking place. The effectiveness and sustainability of the development is promising, however factual evidence of its impact on livelihood improvements is still rare. As a whole the development of m-Agri Apps is mainly stimulated by donor incentives. Among different stakeholders there is the wish to collaborate more and exchange knowledge on: good practises, setting up learning communities, developing m-Agri Apps with open software, making existing data available, developing locally scaled agricultural content and connecting the poorest to mobile networks. Chances lay in better involvement of the agribusiness sector, which gets currently more and more involved with the smallholder communities around the world.
Contract farming configuration: Smallholders'preferences for contract design atrributes
Abebe, G.K. ; Bijman, J. ; Kemp, R.G.M. ; Omta, S.W.F. ; Tsegaye, A. - \ 2013
Food Policy 40 (2013). - ISSN 0306-9192 - p. 14 - 24.
agricultural extension - procurement practices - developing-countries - incentive contracts - farmers preferences - choice experiments - political-economy - rural-development - conjoint-analysis - formal contracts
While Contract Farming (CF) can enhance smallholders’ income in developing countries, empirical research on the motivation of smallholders to participate in CF is scarce. This paper explores farmer preferences for particular contract design attributes. We combined analytical hierarchy process and discrete choice experiments to investigate the importance of contract design attributes. On the basis of data collected among potato farmers in Ethiopia, we found that input market uncertainty is more important than output market uncertainty in smallholders’ decision to participate. Farmers tend to minimize their risk by opting for the buyer firm above the state and NGOs as providers of seed, inputs, and technical assistance. The results imply that the success of a CF scheme depends on the willingness of the firm to incorporate the preferred contract design attributes. Institutional intervention in the input market could induce agribusiness firms to offer attractive contracts for smallholders.
Burgers en varkenssector praten langs elkaar
Rotgers, G. ; Stassen, E.N. ; Bergstra, T.J. - \ 2013
V-focus 10 (2013)5. - ISSN 1574-1575 - p. 40 - 41.
varkenshouderij - houding van consumenten - landbouwsector - communicatievaardigheden - landbouwvoorlichting - dierenwelzijn - dierlijke productie - varkens - pig farming - consumer attitudes - agricultural sector - communication skills - agricultural extension - animal welfare - animal production - pigs
Burgers blijven maar kritiek spuien op de varkenshouderij, terwijl de varkenssector de afgelopen jaren grote stappen voorwaarts heeft gemaakt. Nog beter communiceren en nog meer technische oplossingen blijken onvoldoende te helpen om het draagvlak te vergroten. Maar wat werkt wel? In het project Zorgen over Zorg werd onderzocht waar burgers en sector langs elkaar heen praten.
Beyond fragmentation and disconnect: Networks for knowledge exchange in the English land management advisory system
Klerkx, L.W.A. ; Proctor, A. - \ 2013
Land Use Policy 30 (2013)1. - ISSN 0264-8377 - p. 13 - 24.
agricultural extension - innovation systems - consulting firms - services - information - england - farmers - transformation - consultancies - capabilities
The growing multifunctionality in agriculture, combined with privatisation of previously public agricultural extension services, has resulted in a pluralistic land management advisory system. Despite benefits in terms of increased client orientation and greater advisor diversity, it is argued that these changes have resulted in the fragmentation of the land management advisory system and a reduction of interaction within the advisory system and between the advisory system and science. Hence, concerns have been voiced as regards the capacity of the advisory system to be able to incorporate new knowledge, resulting in a growing interest in how advisors obtain and construct the knowledge necessary for offering adequate advisory services to their clients. In this article we explore how advisors within the English land management advisory system (land agents, applied ecologists and veterinarians) develop and optimise their knowledge by engaging in different kinds of networks (centralised, distributed and decentralised), each of which employs a different type of social capital. Key findings suggest that to obtain the knowledge needed to solve complex queries of clients, advisors use distributed networks and draw upon informal ‘communities of practice’ within their own advisory profession characterised by bonding social capital, but also draw upon broader ‘networks of practice’ involving multiple advisors from different advisory professions, which rely on bridging social capital. The employment of decentralised networks which rely on linking social capital, to solve complex queries or develop new services, for example through contacts with scientific institutes, appears to be less developed, despite brokering activities of the professional associations. Whereas fragmentation and disconnect due to competition and epistemological differences do play a role; they do not appear to prevent overall knowledge exchange among advisors within and across different professions. Assumptions of a collapse of interaction within the land management advisory system are not supported by the evidence, as there appears to be much bonding and bridging social capital. However, to optimise interactions between professions, and between advisors and the science system, either informal brokers or formal brokers in the form of professional associations or other organisations could play a bigger role.
Factors affecting farmer's likelihood to use advisory and extension services
Pascucci, S. ; Magistris, T. de - \ 2012
New Medit 11 (2012)3. - ISSN 1594-5685 - p. 2 - 11.
multivariate probit model - agricultural extension - innovation
Privatization and decentralization of public advisory and extension services (AES) are raising increasing concerns worldwide. However, the way farmers re-act to this reform, and how they select the most appropriate AES still remain puzzling and relatively under-explored. Accordingly, the aim of this paper is to analyze the factors affecting the likelihood of farmers to use different types of AES. We analyze the decisions to use three different types of AES made by a sample of famers (443) in Italy (Marche region). This decision-making mechanism is related to the use of AES introduced by Marche Regional Administration (MRA) in a policy reform in 2005. By adopting this approach, we highlight the relevance of social capital and local networks in driving the decision to use services more related to information, knowledge sharing and diffusion, while the agricultural specialization remains the main factor affecting farmers` likelihood to use specialized and targeted services.
Sectorbrede noviteit op Aardappeldemodag : Proefboerderij Westmaas
Hanse, L. ; Delleman, J. ; PPO Akkerbouw, Groene Ruimte en Vollegrondsgroente, - \ 2012
Aardappelwereld 66 (2012)9. - ISSN 0169-653X - p. 15 - 21.
landbouwvoorlichting - landbouwtentoonstellingen - handelsbeurzen - innovaties - aardappelen - landbouwtechniek - akkerbouw - agricultural extension - agricultural shows - trade fairs - innovations - potatoes - agricultural engineering - arable farming
Een mooie zomerse woensdag in augustus 2012 stond garant voor een zeer geslaagde Aardappeldemodag in Westmaas. In totaal trok de happening 6.000 bezoekers. Ze konden hier een veelheid aan demonstraties bewonderen en een berg informatie tot zich nemen bij de in de totaal 130 standhouders. Daartussen waren sectorbreed noviteiten te zien, waarvan een overzicht in woord en beeld is gemaakt.
'Je bent geen adviseur maar één van de bronnen'
Woerkum, Cees van - \ 2012
consultants - extension agents - communication theory - college programs - agricultural extension - public relations - professionalism
Maak Afrikaanse boer klimaat slim via zijn mobiele telefoon
Huijsman, A. - \ 2012
Kennis Online 9 (2012)jan. - p. 12 - 12.
landbouwvoorlichting - telefoons - internet - informatiesystemen - klimaatverandering - afrika - agricultural extension - telephones - information systems - climatic change - africa
In het hoofd van veel Nederlanders zijn Afrikaanse boeren armoedzaaiers die met pijn en moeite het hoofd boven water houden. Niet waar, zegt Bram Huijsman. De meeste boeren zijn ondernemer en klimaatspecialist. Mobiele technologie zoals weervoorspellingen op de mobiele telefoon kunnen de boeren helpen hun bedrijf beter te organiseren.
Teelt op zand vraagt eigen aanpak : Noviteiten bij proefboerderij Vreedepeel
Delleman, J. ; Hanse, L. ; PPO Akkerbouw, Groene Ruimte en Vollegrondsgroente, - \ 2011
Aardappelwereld 65 (2011)9. - ISSN 0169-653X - p. 17 - 21.
aardappelen - zandgronden - cultuurmethoden - mechanisatie - landbouwtechniek - akkerbouw - landbouwvoorlichting - open dagen - proefboerderijen - potatoes - sandy soils - cultural methods - mechanization - agricultural engineering - arable farming - agricultural extension - open days - experimental farms
Half augustus 2011 stond proefboerderij Vredepeel een dag lang in het teken van aardappelteelt op zandgronden. Aan de hand van live demonstraties, proefvelden en voorlichtingsstands konden bezoekers zien dat het verbouwen van aardappelen in veel opzichten een aangepaste mechanisatie en teelttechniek vraagt. Nog schoner rooiende rooimachines en banden die altijd op lage spanning mogen blijven, waren voorbeelden van enkele interessante noviteiten.
Het koor van adviseurs verdient een dirigent. Over kennisverspreiding rond Phytophthora in aardappelen2011
Buurma, J.S. ; Janssens, S.R.M. - \ 2011
Wageningen : Wettelijke Onderzoekstaken Natuur & Milieu (WOt-werkdocument 247)
solanum tuberosum - aardappelen - plantenziekteverwekkende schimmels - phytophthora infestans - kennisoverdracht - informatieverspreiding - landbouwvoorlichting - plantenziektebestrijding - ziektepreventie - potatoes - plant pathogenic fungi - knowledge transfer - diffusion of information - agricultural extension - plant disease control - disease prevention
In dit werkdocument wordt verslag gedaan van een sociologisch onderzoek naar de kennisverspreiding rond Phytopthora in aardappelen. We beschrijven welke onderwerpen en welke partijen bij de kennisverspreiding zijn betrokken, welke partijen zich met welke onderwerpen bezig houden en welke argumenten zij gebruiken om de belangstelling van de aardappelteler te trekken. Ook wordt aangegeven welke onderwerpen en welke argumenten de aardappelteler zelf het meest aanspreken. Via vergelijking van kennisvraag en kennisaanbod is nagegaan hoe de kennisverspreiding vanuit het onderzoek naar de praktijk kan worden geoptimaliseerd. Centraal in het onderzoek stond de betekenisgeving van primaire producenten, kennisverspreiders, onderzoekers en beleids-makers aan de bestrijding van Phytophthora in aardappelen. De achterliggende veronderstelling was dat een zekere gelijkheid in betekenisgeving cruciaal is voor een soepele kennisverspreiding naar de praktijk. Het onderzoek is gebaseerd op een verkennende analyse van de berichtgeving over Phytophthora in het weekblad Boerderij en op een telefonische enquête bij 25 personen en partijen uit het kennisnetwerk.
't Kompas geeft richting aan veenkoloniale akkerbouw : Interview met Gerard Hoekzema van PPO Valthermond
Buning, Stefan ; Hoekzema, G.A. - \ 2011
Akker magazine 2011 (2011)9. - ISSN 1875-9688 - p. 26 - 29.
proefboerderijen - landbouwkundig onderzoek - landbouwvoorlichting - fabrieksaardappelen - akkerbouw - veenkolonien - kennisoverdracht - experimental farms - agricultural research - agricultural extension - starch potatoes - arable farming - knowledge transfer
Vrijlevende aaltjes, stuiven, vorstgevoeligheid. Geen probleem uit de Veenkoloniale praktijk is PPO-proefbedrijf ’t Kompas in Valthermond vreemd. Sterker nog, soms zoeken de onderzoekers de moeilijkheden juist op. „We maken met regelmaat bewust de foute keuze om te zien wat het effect op de ontwikkeling van het gewas is”, vertelt bedrijfsleider Gerard Hoekzema.
Suikerbieten : praktijkmiddag Proefboerderij Wijnandsrade 22 september 2011 : achtergrondinformatie
Meuffels, G.J.H.M. - \ 2011
CVS Covas [etc.]
suikerbieten - akkerbouw - landbouwvoorlichting - demonstraties (vertoning) - landbouwtechniek - sugarbeet - arable farming - agricultural extension - demonstrations - agricultural engineering
Informatie over de volgende projecten en onderwerpen: samen werken aan een schone Maas; reinigen spuitapparatuur en verwerken restvloeistof en spoelwater; bieten bewaren: vorstvrij, koel en droog; veel percelen besmet met witte bietencysteaaltjes; kijk eens vaker ónder het gewas!; demonstratie bandenspanning en gewichtsverdeling; bodemverdichting op landbouwgronden; demonstratie grondbewerking.
Bijzonder drukke en geslaagde praktijkmiddag! : Interview met Gerard Meuffels
PPO Akkerbouw, Groene Ruimte en Vollegrondsgroente, ; Meuffels, G.J.H.M. - \ 2011
IRS
suikerbieten - demonstraties (vertoning) - landbouwvoorlichting - akkerbouw - landbouwtechniek - sugarbeet - demonstrations - agricultural extension - arable farming - agricultural engineering
Het belangstellende publiek kwam donderdag 22 september 2011 massaal naar Proefboerderij Wijnandsrade. CSV COVAS, PPO en IRS organiseerden daar de praktijkmiddag suikerbieten.
Kennis van mest, middelen en techniek op velddagen: Interview met Piet Bleeker
Tonjes, J. ; Bleeker, P.O. - \ 2011
Nieuwe oogst / Magazine gewas 7 (2011)12. - ISSN 1871-093X - p. 12 - 13.
open dagen - landbouwvoorlichting - bodemkwaliteit - bemesting - biologische landbouw - open days - agricultural extension - soil quality - fertilizer application - organic farming
De Akkerbouwvelddag zal weer veel telers naar PPO Lelystad lokken. Ze kunnen dit bezoek combineren met de Biologische Velddag op de Broekemahoeve. De programma's van beide dagen overlappen elkaar in interessegebied.
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