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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Lifelines for Ramat Hanadiv : an analysis of the necessity for ecological corridors
Sluis, T. van der; Eupen, M. van - \ 2013
Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2423)
ecologische hoofdstructuur - landschapsecologie - ecologie - modellen - wild - wildbescherming - israël - ecological network - landscape ecology - ecology - models - wildlife - wildlife conservation - israel
This report presents the results of an analysis of the ecological network for Ramat Hanadiv. We used the LARCH Landscape ecological model to assess, first, the long-term viability of the wildlife populations of Ramat Hanadiv, and secondly, to identify where the most important landscape connections or corridors are situated. Analysis shows that almost no species are viable in Ramat Hanadiv alone; almost all require some exchange with surrounding populations. The exchange with surrounding areas is therefore essential for biodiversity in Ramat Hanadiv. Specific de-fragmentation measures are important. The best measure to improve viability is to ensure that a corridor eastward is maintained. The best location for the corridor is most likely through the industrial zone. A potential corridor through the Taninim River would be another option. This would likely require further study and a significantly larger investment of resources.
Israel cultiveren nederlands
Livestock Research, - \ 2012
[S.l.] : YouTube
melkveehouderij - loopstallen - dierlijke meststoffen - cultivateren - onderlaag - compostering - vloertypen - israël - dairy farming - loose housing - animal manures - chiselling - understorey - composting - floor type - israel
Nadat de eerder opgeslagen mest weer wordt uitgereden op de vloer van de Israelische loopstal en met een cultivator met de onderlaag is gemengd, wordt het mengsel bekeken en beoordeeld.
Studiereis vrijloopstal Israel 2008
Livestock Research, - \ 2012
[S.l.] : YouTube
melkveehouderij - loopstallen - dierlijke meststoffen - cultivateren - compostering - israël - dairy farming - loose housing - animal manures - chiselling - composting - israel
Een Israelische boer vertelt dat elke dag op zijn bedrijf de reeds opgeslagen mest op zijn bedrijf wordt uitgereden en met een cultivator wordt gemengd met de grondlaag waar het wordt uitgereden.
EBONE in Mediterranean and desert sites in Israel, with notes on South Africa : report on field tests in LTER sites and habitat monitoring
Olsvig-Whittaker, L. ; Jobse, D. ; Gelder, A. de - \ 2011
Wageningen : Alterra (Alterra-rapport 2260) - 54 p.
habitats - biodiversiteit - remote sensing - woestijnen - israël - zuid-afrika - biodiversity - deserts - israel - south africa
Arid landscape dynamics along a precipitation gradient: addressing vegetation - landscape structure - resource interactions at different time scales
Buis, E. - \ 2008
Wageningen University. Promotor(en): Tom Veldkamp; N. van Breemen, co-promotor(en): B. Boeken. - S.l. : S.n. - ISBN 9789085049463 - 190
droge gebieden - landschap - bodemmorfologie - neerslag - gradiënten - dynamica - watervoorraden - israël - landschapsanalyse - bodem-landschap relaties - arid lands - landscape - soil morphology - precipitation - gradients - dynamics - water resources - israel - landscape analysis - soil-landscape relationships
This research is entitled ‘Arid landscape dynamics along a precipitation gradient: addressing
vegetation – landscape structure – resource interactions at different time scales’ with as subtitle
‘A case study for the Northern Negev Desert of Israel’. Landscape dynamics describes the
interactions and feedbacks among landscape structure, resource flows and organisms. This study
focuses on the Northern Negev Desert of Israel, a semi-arid to arid rock desert with local loess
and sand cover. Climate and humans are important driving factors of landscape dynamics here.
Semi-arid and arid regions worldwide, are vulnerable to land degradation and desertification. A
profound knowledge of the processes in these regions can help to avert land degradation and
desertification. The objective of this thesis is to increase the knowledge on landscape dynamics
and its drivers in semi-arid and arid regions by field and model studies in the Northern Negev
Desert. This study can contribute to a sustainable future for the inhabitants of these areas.
• Chapter 1 is the introduction of this thesis and discusses among others the four studied
catchments along a precipitation gradient: Lehavim receives at average 280 mm precipitation per
year, Sayeret Shaked 200 mm yr-1, Halluqim 93 mm yr-1 and Avdat 87 mm yr-1. Of the surface of
Lehavim 53% is covered by vegetation and 15% by bedrock outcrops. The catchment is
intensively grazed by livestock. Sayeret Shaked is covered by a thick layer of homogeneous
loess. Vegetation cover is dense (62%). The catchment is taken out of grazing since 1987. In
Halluqim only 20% of the surface is covered by vegetation. The catchment is very rocky, as
bedrock crops out at 42% of the surface. Avdat, located close by, is much less rocky (7%). Here
22% of the surface is covered by vegetation. Both catchments are extensively grazed.
The thesis can be separated in three parts. In the first part the relationships between landscape
structure and vegetation in the four catchments is studied by statistical analyses. This part gives
insight in the landscape dynamics along a precipitation gradient and provides a system
framework for the remainder of the thesis. The second part focuses on simulating water and
sediment dynamics in the catchments using the landscape evolution model LAPSUS. The model
is adapted to a semi-arid and arid climate, and vegetation cover is incorporated. The interactions
between resource flows and vegetation is studied by model simulations. In the third part the
system knowledge and modelling framework are applied at a longer time scale. Firstly the history
of a valley fill is reconstructed by field observations, after which this valley fill is simulated with
LAPSUS. Additionally the effect of land use on the valley fill development is tested by model
simulations.
Part 1: System framework
• In chapter 2 the controls on functional surface cover types are studied in the four catchments
along the precipitation gradient. First, four functional surface cover types are selected, based on
their unique functionality in terms of water use and redistribution: shrubs, Asphodelus ramosus,
other herbaceous plants and surface crusts (biological and physical). Percentage of surface cover
of these functional surface cover types is estimated, and of bedrock outcrops and loose surface
stones. Additionally, data is collected on soil depth, relative elevation, insolation, slope, profile
curvature and plan curvature. Relations between functional surface cover types and landscape
structure variables are analyzed with descriptive statistics, factor analyses and linear regressions.
The landscape structure variables bedrock outcrop, relative elevation, soil depth and surface
stones explain most of the cover variance in the catchments. In catchments with many bedrock
outcrops, the occurrence of functional surface cover types is best explained by the landscape
structure variables. In catchments with homogeneous soils reaching beyond the root zone,
biological interactions between functional surface cover types are more important. Along the
precipitation gradient the explanatory power of the biological variables decreases with decreasing
precipitation, while the explanatory power of landscape structure variables appears unrelated.
Only in homogeneous semi-arid catchments can regular vegetation patterns develop, in arid and
heterogeneous catchments irregular vegetation patterns dominate.
Part 2: Model framework
• In chapter 3 the process of water redistribution at catchment scale is studied with the landscape
evolution and erosion model LAPSUS. LAPSUS, formerly applied in Mediterranean regions, is
modified to deal with the arid climate of the Northern Negev Desert of Israel. Daily model runs
are used instead of yearly model runs, and the infiltration module is adapted to better represent
the spatial diversity in water availability in an arid catchment. The model is calibrated for
Halluqim and Avdat. First, a sensitivity analysis of the modified LAPSUS was done. Especially
pore volume of the soil appears to have a strong influence on the modelling results. Second, the
capability of LAPSUS to deal with varying surface characteristics was assessed by comparing the
simulated water redistribution patterns in the two catchments with field data. Simulation results
demonstrate that the catchments respond very different to precipitation. Water redistribution is
larger in the dominantly bedrock-covered Halluqim compared to the dominantly sedimentcovered
catchment of Avdat. Consequently, Halluqim has more positions with water
accumulation than Avdat, and can sustain a larger vegetation cover including Mediterranean
species. Finally the modelled infiltration patterns are spatially compared with vegetation cover in
the catchments. The results indicate that there is a broad agreement between infiltration and
vegetation patterns, but locally there is a strong mismatch indicating that part of the involved
processes are still missing in the model.
• In chapter 4 the interactions between resource flows and vegetation is studied and simulated in
the loess-covered catchment of Sayeret Shaked. In semi-arid areas vegetation is scarce and occurs
often as individual shrubs on raised mounds. The formation process of these mounds is still
debated. In this chapter the hypothesis that shrub mounds are formed in part of the Northern
Negev Desert by erosion and sedimentation is tested. Height and diameter of shrub canopy and
shrub mounds are measured and micro-morphological techniques are used to reconstruct the
formation process of the shrub mounds. The results suggests that shrub mounds are formed by
accumulation of atmospheric dust and sedimentation of eroded material in the vicinity of the
shrub, as well as by erosion of the surrounding crust. Model simulations are done for single
events and longer time scale (100 years). In the simulations, mound formation appears most
prominent at low shrub density and large shrub canopy diameter. Positive and negative feedbacks
between shrubs and resource redistribution results in a meta-stable landscape. Long-term model
simulations of the current climate indicates that initially formation rate of shrub mounds is high,
but stabilized at lower rates. In dryer and wetter climates mound formation is unlikely to happen,
as respectively too little or too many resources are redistributed, causing a stable or highly
erosive landscape. Mound simulation with LAPSUS is successful and simulated shrub mounds
resemble the actual shrub mounds in Sayeret Shaked. Consequently the model may prove to be
valuable for the modelling of ecohydrological landscape processes in semi-arid areas.
Part 3: Long-term application
• In chapter 5 the interactions between climate change, human occupation and semi-arid
landscape dynamics are studied to increase the insight in the effect of climate change and human
land use. A Late Quaternary valley fill in the catchment of Sayeret Shaked is studied. The
aggradation and incision history is reconstructed based on a transect study. The reconstructed
valley fill is put in a temporal framework by correlation with local climate records and optically
simulated luminescence and potsherd dates. Two Late Pleistocene and four Holocene aggradation
and incision cycles are recognized, of which three in the last 2000 years. Contradictory to the
expected positive relation between amplitude of climate fluctuations and cycles of aggradation
and incision, the Late Holocene cycles are stronger than those in the Late Pleistocene and Early
to Middle Holocene. The most significant cycle coincides with the rise and fall of the Byzantine
Empire and appears related to the higher pressure on the landscape due to human occupation
during that time. Human activity appears to have a strongly amplifying effect on aggradation and
incision phases, which are initially triggered by climate fluctuations. This amplifying effect
occurs only when human occupation crosses a threshold and triggers destabilization of the
landscape. It causes collapse of the ecosystem and increases sediment redistribution.
• Chapter 6 aims to quantify the effect of humans on semi-arid catchments, by reconstructing the
infill history of Sayeret Shaked using LAPSUS. First, the infill history of Sayeret Shaked
between about 800 BC and 800 AD is simulated. Second, three land use scenarios are tested to
quantify the effect of extensive grazing, intensive grazing and intensive grazing combined with
rainfed agriculture. Especially intensive grazing combined with rainfed agriculture leads to strong
landscape dynamics. Extensive grazing causes almost no landscape dynamics, resulting in an
almost stable landscape. The results seem to indicate that this catchment is formed by coevolution
of human and natural induced processes. Rainfed agriculture leads to valley
aggradation by tillage translocation, whereas intensive livestock grazing causes gully incision by
increased slope runoff. Humans appear to be the main driven factor of landscape dynamics in this
semi-arid catchment, much more than climate fluctuations. Only a short time period of strong
human land use can irreversibly alter the development trajectory of a catchment. It is thus of high
importance to manage the land sustainable, both in the present and future, to avoid further
degradation of drylands.
• In chapter 7 the results of the different chapters are combined and the most important
conclusions discussed. The four catchments display very different landscape dynamics, caused by
a high variation in climate, land use and landscape structure. In Lehavim and Halluqim the
landscape dynamics is strongly influenced by the landscape structure, because bedrock outcrops
regulate positions for vegetation grow and stimulate water redistribution. In Sayeret Shaked water
redistribution depends mainly on biological surface cover. In Sayeret Shaked interactions
between shrub and crust patches can, under a more intensive grazing regime, lead to regular
vegetation patterns. When grazing pressure is released the herbaceous plant coverage recovers, as
is happening today. Avdat is a divers catchment, with steep rock outcrop, a flat plateau and a
loess covered wide gully. Though the whole catchment is characterized by a high aridity, each
zone experiences different landscape dynamics.
At a larger spatial scale, in the whole Northern Negev Desert, the most relevant interactions and
feedbacks between landscape structure, resource flows and organisms are related to water
availability and redistribution as well. Since the Late Holocene, the main driving factor of
landscape dynamics is human land use, especially tillage and intensive livestock grazing. Climate
fluctuations seem to have much less influence on the region. The influence of humans, even
confined in a small period in time, strongly affects landscape development in the whole Northern
Negev Desert, causing co-evolution and formation of cultural landscapes.
Trade opportunities for Dutch agribusiness in Turkey and Israel
Berkum, S. van; Kelholt, H.J. - \ 2007
The Hague : LEI (Report / LEI : Domain 5, Chains ) - ISBN 9789086151950 - 82
agrarische economie - agrarische handel - handelsrelaties - landbouwindustrie - export - investering - turkije - israël - nederland - agro-industriële ketens - agricultural economics - agricultural trade - trade relations - agribusiness - exports - investment - turkey - israel - netherlands - agro-industrial chains
This study analyses the agricultural trade relations of the Netherlands with Turkey and with Israel, and investigates the present market positions of the Dutch agribusiness in the two countries. Based on a review of market and agri-food supply chain developments, opportunities for expansion of trade and strengthening of Dutch positions in these two countries are evaluated. The study points at the many export and/or investment opportunities in Turkey for Dutch agribusiness in food products and input supplies and services. At the same time, basic conditions in Israel are not conducive to booming export prospects for Dutch agribusiness companies. The study, conducted at the request of the Ministry of Landbouw Natuur en Voedselkwaliteit, may help the Ministry's desk in Ankara prioritising its activities in Turkey and Israel.
Efficientie van energie en gewasbeschermingsmiddelen tomaten en rozen in kassen : Nederland, Israel, Spanje en Marokko
Verhaegh, A.P. - \ 1996
Den Haag : Landbouw-Economisch Instituut (LEI-DLO), Afdeling Tuinbouw (Publikatie / Landbouw-Economisch Instituut (LEI-DLO) 4.142) - ISBN 9789052423678 - 84
energiebehoud - israël - solanum lycopersicum - marokko - nederland - sierplanten - pesticiden - gewasbescherming - teelt onder bescherming - spanje - tomaten - rosa - energy conservation - israel - morocco - netherlands - ornamental plants - pesticides - plant protection - protected cultivation - spain - tomatoes
Verslag van een studiereis door Israel en het bezoek aan het "2nd International Congress of Plant Molecular Biology", Jeruzalem, November 1988
Lindhout, P. ; Mark, F. van der - \ 1989
Wageningen : I.V.T. (IVT-rapport 257) - 13
israël - moleculaire genetica - plantenveredeling - reisverslagen - israel - molecular genetics - plant breeding - travel reports
Verslag studiereis Israel, 2 - 11 april 1989
Colijn - Hooymans, T. ; Derks, S. - \ 1989
Wageningen : IVT (Rapport / Instituut voor de Veredeling van Tuinbouwgewassen 261) - 15
israël - plantenveredeling - onderzoek - reisverslagen - israel - plant breeding - research - travel reports
De teelt van 'Ziva' in Israel : verslag van een studiereis
Greef, F.T. de - \ 1989
Lisse : Stichting Laboratorium voor Bloembollenonderzoek (L.B.O. rapport nr. 69) - 27
israël - bloembollen - narcissus tazetta - israel - ornamental bulbs
Bloembiotechnologie in Israel : verslag van een studiereis naar Israel, 9 - 20 juni 1986
Bino, R. - \ 1986
Wageningen : I.V.T. (Rapport / Instituut voor de Veredeling van Tuinbouwgewassen 225) - 9
genetische modificatie - genetica - israël - recombinant dna - genetic engineering - genetics - israel
Desert environment and agriculture in the Central Negev and Kadesh-Barnea during historical times
Bruins, H.J. - \ 1986
Landbouwhogeschool Wageningen. Promotor(en): L.J. Pons; A.M. van der Woude. - Wageningen : Bruins - ISBN 9789071666018 - 219
landbouw - regenwateropvang - landbouw met waterafvoer - water - watervoorziening - bodemkarteringen - nomadisme - pastoralisme - woestijnen - geschiedenis - israël - aride klimaatzones - agriculture - water harvesting - runoff farming - water supply - soil surveys - nomadism - pastoralism - deserts - history - israel - arid zones
<p>A description is given of historic land-use and ancient agriculture in the arid desert environment of the central Negev and adjacent northeastern Sinai, based on archeaeological research and soil research.</p><p>Relationships between the landscape, climatic and agricultural history are evaluated.</p>
Verslag van een studiereis naar Israel, 19-28 november 1984
Jong, J. de; Tuyl, J. van - \ 1985
Wageningen : IVT (Rapport / Instituut voor de Veredeling van Tuinbouwgewassen 206) - 15
proefstations - israël - plantenveredeling - onderzoeksinstituten - experimental stations - israel - plant breeding - research institutes
The ecosystem of the Yahudia Nature Reserve with emphasis on dynamics of germination and development of Quercus ithaburensis decne
Kaplan, Y. - \ 1984
Landbouwhogeschool Wageningen. Promotor(en): M.F. Moerzer Bruyns, co-promotor(en): G. Orshan. - S.l. : S.n. - 339
biocenose - biogeochemie - kringlopen - ecosystemen - fagaceae - bosbouw - bossen - israël - nationale parken - natuurbescherming - natuurreservaten - plantenecologie - planten - savannebossen - zaadkieming - groei van zaailingen - bomen - vegetatie - quercus ithaburensis - biocoenosis - biogeochemistry - cycling - ecosystems - forestry - forests - israel - national parks - nature conservation - nature reserves - plant ecology - plants - savanna woodlands - seed germination - seedling growth - trees - vegetation
6 main subjects connected with the ecology of the Yahudia Forest Reserve are discussed in this paper, following a general survey of the history of nature conservation in Israel against the background of the neighbouring countries. We have described the physical and historical background of the Yahudia Forest; the inventory of vertebrates; the inventory of vegetation, analysing composition and mapping; described and researched Quercus ithaburensis from various aspects, with emphasis on phenology, germination, establishment and survival, and have also described and researched fires and cattle grazing in the Reserve.

The Yahudia Forest is a nature reserve situated in the central part of the Golan, north-east of Lake Tiberias. The reserve, which extends over some 6600 ha, is located mostly 0-300 m above sea level. Level in its greater part, the reserve is cleft by deep canyons of perennial streams. Its soil, mostly basaltic-montmorilonitic, overlies mother rock of cover basalt which erupted in the Upper Pliocene and the Pleistocene epochs. A few limestone exposures from the Neogene can be found in the southern part. The climate is mediterranean, with annual precipitation of about 500 m.

In our survey of vertebrates we found 172 species. A more detailed survey was made of rodents and birds. As for mammals, our main interest was centred on wild boar, gazelles and rodents in context with their impact on vegetation in general and on Quercus ithaburensis in particular.

The vegetation survey was analysed by the nodal ordination method, and vegetation units were established accordingly. The central vegetation unit is the Quercus ithaburensis formation whose principal alliance of associations is that of a Quercus ithaburensis park forest, with grasslands of Avena sterilis and Hordeum bulbosum occupying the greater part of the plane areas. The higher areas of the Quercus ithaburensis Park Forest contain a unit of Ziziphus lotus savannoid vegetation, which appears to be a secondary vegetation following deforestation. In the low-lying regions of the forest park we have a unit of Ziziphus spinachristii savannoid vegetation. On the steep declivities grows an alliance of Styrax officinalis and Ferula tingitana associations which creates a denser forest. The aquatic vegetation is represented by the Salix acmophylla-Nerium oleander formation, and on the limestone exposures we have the Salsola vermiculata - Salvia dominica formation.

The phenology of Quercus ithaburensis has been researched and described, and the formation of cambial rings examined. It was found that normally me annual ring is formed, and that a direct connection exists between the quantity of annual precipitation and ring-width. On the basis of this connection and correlation between surface of sections and ages of trees, we drew up a diagram of distribution of tree ages which shows a high frequency of 40-60 years old trees and a low frequency of trees over 100 years old. On the basis of this diagram and historical evidence, we cam to the conclusion that most fellings of trees in the forest occurred in the periods of Circassian settlement during the latter half of the 19th Century and during the period of the First World War. The relatively high frequency of seedlings and mature trees, and the low frequency of middle-aged trees, led us to a deeper research of the subject of seedling germination, establishement and survival.

We examined the fertility of Quercus ithaburensis trees and the extent of acorn consumption by animals, and found great variability in acorn production, though the average yield per tree was 800 acorns. The greater part of the acorns are consumed by wild boar, and the smaller part by cattle and rodents. Acorns have a high germination potential, but lose it within a few days of having been exposed to dry weather conditions.

Over a period of 5 years observations were made of natural, hand-sown and transplanted seedlings under different grazing regimes (without wild boar or cattle; with wild boar and without cattle; with wild boar and cattle), and in different habitats connected with cairns on which grow most of the trees in the forest (top of cairn; slope of cairn; slope of cairn within tree's shade zone; bottom of cairn; open space outside cairn).

We found that there was more germination in open habitats, though only in the absence of wild boar. Where wild boar are present cairns have the advantage because not only are they more difficult of access to wild boar but desiccation of acorns is avoided there.

The positive reactions to irrigation and weeding have proved that water and competition are limiting factors in seedling establishment. It was found that acorns survive better in cairns where they are shielded from desiccation, competition with grasses, and to a relative extent also from fires. Satisfactory establishment was found under cattle-grazing regimes, where seedlings have less competition with herbaceous vegetation and fact lower fire frequency and intensity.

An analysis was made of the fire incidents in the Yahudia Forest - all of which man-made. In the southern part of the reserve which contains military training areas, a high frequency of fires was recorded in May. Here, a small number of fires consume large areas. In the northern part, which is under grazing, more fires occur although they are of lower intensity and consume smaller areas, and frequency is highest in June-July. A fire-frequency map was drawn up, enabling forecasts to be made of fire-prone areas, and accordingly a policy of fire-break spraying and control was recommended. It was found that notwithstanding the relative fire resistance of the adult tree, the impact of fire on seedlings and acorns is of tremendous significance for the forest's existence.

Cattle-grazing in the reserve has been examined with regard to its effects on herbaceous vegetation and on Quercus ithaburensis. A quantitative analysis of forage composition and cattle behaviour m pasture was made. It was found that only heavy grazing affects the composition of herbaceous vegetation and causes a relative rise in the growth of ruderal species. Quercus ithaburensis was found to form an important component of the cattle's diet, with leaves being consumed in summer, and acorns in winter. The quantity and nutritional value of acorns consumed made them a factor that should be taken into account in pasture planning.

A theoretical model describing the processes of germination, establishment and survival of Quercus ithaburensis has been brought, as have the various factors affecting the two main inhibition periods in the life of the seedling The main factors were found to be fire, water regime, and competition with grasses and adult trees, whereas rodents and wild boar have positive as well as negative effects, particularly during the germination period.

We have recommended that reserve management be based on programmed cattlegrazing of about 1200 mother cows in the northern part of the reserve, and on a fire-prevention regime with emphasis on the self-same area.

We have worked out a policy of regulating visitor intensity in accordance with the vulnerabilities of the various reserve areas, based on strict zones in the cental part of the reserve; zones for walking tours, and intensive development zones. Recommendation has been made to concentrate wildlife and reintroduce wild animal species that existed in the region in the past into the central area of the reserve's southern part, and to afford the public limited access to this area.

As far as vegetation is concerned, no intervention appears to be necessary, with the exception of afforestation of Quercus ithaburensis and Pistacia atlantica in the high-lying, unforested parts, and to extend such afforestation also to regions outside the reserve that were covered with forest in the past. A technique for planting Quercus ithaburensis trees has been recommended.

In this paper, we have dealt with the processes and main problems of the reserve, with a view to gaining tools for its management and with the intention that it my also serve as a model for researches in other nature reserves in Israel and comparable areas elsewhere. We are aware that there is still much room for research and accomplishment in spheres which have not found expression in this paper.

Verslag van een studiereis naar Israel, 7-17 december 1981
Hogenboom, N.G. ; Nijs, A.P.M. den - \ 1982
Wageningen : I.V.T. (Rapport / Instituut voor de Veredeling van Tuinbouwgewassen no. 174) - 28
israël - plantenveredeling - onderzoek - groenteteelt - groenten - israel - plant breeding - research - vegetable growing - vegetables
Bodemkundige aspecten van kasteelten in subtropisch Israel : verslag van een studiereis van 20 april-tot 5 mei 1982
Knaap, W.C.A. van der - \ 1982
Wageningen : STIBOKA - 30
israël - kaarten - bodemkarteringen - glastuinbouw - israel - maps - soil surveys - greenhouse horticulture
Excursie glastuinbouw bodem Stiboka
Verslag van een studiereis naar Israel : febr. - mei 1978
Slootweg, A.F.G. ; Timmer, M.J.G. ; Vroomen, C.O.N. de - \ 1978
Lisse : L.B.O. (Rapport / Stichting laboratorium voor bloembollenonderzoek no. 39) - 58
bollen - israël - liliaceae - liliales - sierplanten - bulbs - israel - ornamental plants
Verslag van een studiereis naar Israel van 24 april tot 5 mei 1977
Spiertz, J.H.J. ; Vos, N.M. de - \ 1977
Wageningen : LH (Mededeling / Landbouwuniversiteit, Vakgroep Landbouwplantenteelt en Graslandcultuur nr. 47) - 17
akkerbouw - veldgewassen - hexaploïdie - israël - triticum aestivum - tarwe - arable farming - field crops - hexaploidy - israel - wheat
Verslag van een studiereis langs een aantal instellingen voor landbouwkundig onderzoek in Israel
Eenink, A.H. - \ 1975
Wageningen : [s.n.] (Rapport / Instituut voor de veredeling van tuinbouwgewassen no. 120) - 23
proefstations - israël - plantenveredeling - onderzoek - onderzoeksinstituten - experimental stations - israel - plant breeding - research - research institutes
Verslag van een studiereis naar Zuid - Italie en Israel van 14 tot en met 25 februari 1972
Doesburg, J. van; Teunissen, P.P.A. - \ 1972
Aalsmeer : Proefstation voor de Bloemisterij - 25
bloementeelt - italië - israël - excursies - floriculture - italy - israel - field trips
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