Recent Projects
The effect of climate change on the carrying capacity of Israel's grazing lands. Chief Scientist, Israel Ministry of Agriculture.
Implementation of advanced tools for the understanding of the spatial pattern of utilization of hilly rangelands by sheep grazing under traditional management and its effect on the vegetation. Israel Rangelands Board, Israel Ministry of Agriculture.
Biodiversity patterns and processes in water-limited ecosystems: a unified approach. Israel Science Foundation.
Goats for maximal efficiency of brush control. BARD (US - Israel Binational Agricultural Research and Development Fund).
Identification of primary management factors that determine efficiency of production in the beef cattle herd at pasture. Chief Scientist, Israel Ministry of Agriculture.
Towards Sustainability of Dryland Afforestation - factors limiting the recruitment of the Yatir Pinus halepensis Forest. USAID-MERC.
Study of the behaviour of beef cattle on rangeland using activity sensors and GPS for the improved management of herds and the landscape. Chief Scientist, Israel Ministry of Agriculture.
Development of a model for beef cattle production on rangeland that aims for profitability and sustainability. Israel Rangelands Board, Israel Ministry of Agriculture.
A program for the increase of beef cattle production on mediterranean woodland. Israel Rangelands Board, Israel Ministry of Agriculture.
Publications
Articles in reviewed journals
Paz-kagan, T., Alexandroff, V., Ungar, E.D. (2023) Detection of goat herding impact on vegetation cover change using multi-season, multi-herd tracking and satellite imagery. Science of the Total Environment (accepted)
Navon, S., Kigel, J., Dudai, N., Knaanie, A.,Glasser, T.A., Shachter, A., Ungar, E.D. (2019) Volatiles and tannins in Pistacia lentiscus and their role in browsing behavior of goats (Capra hircus). Journal of Chemical Ecology (accepted).
Ungar, E.D. (2019) Perspectives on the concept of rangeland carrying capacity, and their exploration by means of Noy-Meir's two-function model. Agricultural Systems 173: 403-413.
https://authors.elsevier.com/sd/article/S0308521X18308758
Seligman, N.G., Ungar, E.D., Perevolotsky, A., Henkin, Z. (2019) An assessment of grazing management options for Mediterranean grasslands using Noy-Meir's model of system dynamics parameterized from a long-term field trial. The Journal of Agricultural Science 156:1205-1215.
https://doi.org/10.1017/S0021859619000157
Ungar, E.D., Nevo, Y., Baram, H., Arieli, A. (2018) Evaluation of the IceTag leg sensor and its derivative models to predict behaviour, using beef cattle on rangeland. Journal of Neuroscience Methods 300: 127-137.
Landau, S.Y., Dvash, L., Yehuda, Y., Muklada, H., Peleg, G., Henkin, Z., Voet, H., Ungar, E.D. (2018) Impact of animal density on cattle nutrition in dry Mediterranean rangelands: a faecal NIRS-aided study. Animal 12:265-274.
DOI: http://dx.doi.org/10.1017/S1751731117001422
Schoenbaum, I., Kigel, J., Ungar, E.D., Dolev, A., Henkin, Z. (2017) Spatial and temporal activity of cattle grazing in Mediterranean oak woodland. Applied Animal Behaviour Science 187:45–53.
DOI: http://dx.doi.org/10.1016/j.applanim.2016.11.015
Arviv, A., Muklada, H., Kigel, J., Voet, H., Glasser, T., Dvash, L., Ungar, E.D. and Landau, S.Y. (2016) Targeted grazing of milk thistle (Silybum marianum) and Syrian thistle (Notobasis syriaca) by goats: preference following preconditioning, generational transfer, and toxicity. Applied Animal Behaviour Science accepted.
Agra, H., Ne'eman, G., Shachak, M., Segoli, M., Gabay, O., Perevolotsky, A., Arnon, A., Boeken, B., Groner, E., Walczak, M., Shkedy, Y., Cohen, S. and Ungar, E.D. (2015) Canopy structure of woody landscape modulators determines herbaceous species richness along a rainfall gradient. Plant Ecology 216:1511-1522.
Landau, S.Y., Dvash, L., Roudman, M., Muklada, H., Barkai, D., Yehuda, Y. and Ungar, E.D. (2016) Faecal near-IR spectroscopy to determine the nutritional value of diets consumed by beef cattle in east Mediterranean rangelands. Animal 10(2): 192-202.
DOI: http://dx.doi.org/10.1017/S175173111500169X
Henkin, Z., Ungar, E.D., Perevolotsky, A., Gutman, M., Yehuda, Y., Dolev, A., Landau, S.Y., Sternberg, M. and Seligman, N.G. (2015) Long-term trade-offs among herbage growth, animal production, and supplementary feeding in heavily grazed Mediterranean grassland. Rangeland Ecology and Management 68:332-340.
Sternberg, M., Golodets, C., Gutman, M., Perevolotsky, A., Kigel, J., Ungar, E.D. and Henkin, Z. (2015) Testing the limits of resistance: a 19-yr study of Mediterranean grassland response to grazing regimes. Global Change Biology 21:1939-1950.
DOI: http://dx.doi.org/10.1111/gcb.12866
Golodets, C., Sternberg, M., Kigel, J., Boeken, B., Henkin, Z., Seligman, N.G. and Ungar, E.D. (2015) Climate change scenarios of herbaceous production along an aridity gradient: vulnerability increases with aridity. Oecologia 177:971-979.
DOI: http://dx.doi.org/10.1007/s00442-015-3234-5
Villalba, J.J., Miller, J., Ungar, E.D., Landau, S.Y. and Glendinning, J. (2014) Ruminant self-medication against gastrointestinal nematodes: evidence, mechanism, and origins. Parasite 21:31 (10 pp.)
DOI: http://dx.doi.org/10.1051/parasite/2014032
Dolev, A., Henkin, Z., Brosh, A., Yehuda, Y., Ungar, E.D., Shabtay, A. and Aharoni, Y. (2014) Foraging behavior of two cattle breeds - a whole-year study: II. Spatial distribution by breed and season. Journal of Animal Science 92:758-766.
DOI: http://dx.doi.org/10.2527/jas.2013-6996
DeMalach, N., Kigel, J., Voet, H. and Ungar, E.D. (2014) Are semiarid shrubs resilient to drought and grazing? Differences and similarities among species and habitats in a long-term study. Journal of Arid Environments 102:1-8.
DOI: http://dx.doi.org/10.1016/j.jaridenv.2013.10.016
Delgado-Baquerizo, M., Maestre, F.T., Gallardo, A., Bowker, M.A., Wallenstein, M.D., Quero, J.L., Ochoa, V., Gozalo, B., García-Gómez, M., Soliveres, S., García-Palacios, P., Berdugo, M., Valencia, E., Escolar, C., Arredondo, T., Barraza-Zepeda, C., Bran, D., Carreira, J.A., Chaieb, M., Conceição, A.A., Derak, M., Eldridge, D.J., Escudero, A., Espinosa, C.I., Gaitán, J., Gatica, M.G., Gómez-González, S., Guzman, E., Gutiérrez, J.R., Florentino, A., Hepper, E., Hernández, R.M., Huber-Sannwald, E., Jankju, M., Liu, J., Mau, R.L., Miriti, M., Monerris, J., Naseri, K., Noumi, Z., Polo, V., Prina, A., Pucheta, E., Ramírez, E., Ramírez-Collantes, D.A., Romão, R., Tighe, M., Torres, D., Torres-Díaz, C., Ungar, E.D., Val, J., Wamiti, W., Wang, D. and Zaady, E. (2013) Decoupling of nutrient cycles as a function of aridity in global dryland soils. Nature 502: 672-676.
DOI: http://dx.doi.org/10.1038/nature12670
Amit, M., Cohen, I., Marcovics, A., Muklada, H., Glasser, T.A., Ungar, E.D. and Landau, S.Y. (2013) Self-medication with tannin-rich browse in goats infected with gastro-intestinal nematodes. Veterinary Parasitology 198:305-311.
DOI: http://dx.doi.org/10.1016/j.vetpar.2013.09.019
Aharoni, Y., Dolev, A., Henkin, Z., Yehuda, Y., Ezra, A., Ungar, E.D. and Shabtay, A. (2013) Foraging behavior of two cattle breeds, a whole-year study: I. Heat production, activity, and energy costs. Journal of Animal Science 91:1381-1390.
DOI: http://dx.doi.org/10.2527/jas.2012-5400
Golodets, C., Sternberg, M., Kigel, J., Boeken, B., Henkin, Z., Seligman, N.G. and Ungar, E.D. (2013) From desert to Mediterranean rangelands: Will increasing drought and inter-annual rainfall variability affect herbaceous annual primary productivity? Climatic Change 119:785-798.
DOI: http://dx.doi.org/10.1007/s10584-013-0758-8
Ungar, E.D., Rotenberg, E., Ras Yaseef, N., Cohen, S., Yakir, D. and Schiller, G. (2013) Transpiration and annual water balance of Aleppo pine in a semiarid region: implications for forest management. Forest Ecology and Management 298:39-51.
DOI: http://dx.doi.org/10.1016/j.foreco.2013.03.003
Giladi, I., Segoli, M., Ungar, E.D. (2013) Shrubs and herbaceous seed flow in a semiarid landscape: dual functioning of shrubs as trap and barrier. Journal of Ecology 101:97-106.
DOI: http://dx.doi.org/10.1111/1365-2745.12019
Navon, S., Mizrach, A., Hetzroni, A., Ungar, E.D. (2013) Automatic recognition of jaw movements in free-ranging cattle, goats and sheep, using acoustic monitoring. Biosystems Engineering 114:474-483.
DOI: http://dx.doi.org/10.1016/j.biosystemseng.2012.08.005
Orenstein, D.E., Groner, E., Argaman, E., Boeken, B., Preisler, Y., Shachak, M., Ungar, E.D. and Zaady, E. (2012) An Ecosystem Services Inventory: Lessons from the Northern Negev Long-Term Social Ecological Research (LTSER) Platform. Geography Research Forum 32:96-118.
Azaizeh, H., Halahleh, F., Abbas, N., Markovics, A., Muklada, H., Ungar, E.D., Landau, S.Y. (2012) Polyphenols from Pistacia lentiscus and Phillyrea latifolia impair the exsheathment of gastro-intestinal nematode larvae. Veterinary Parasitology 191:44- 50.
DOI: http://dx.doi.org/10.1016/j.vetpar.2012.08.016
Henkin, Z., Ungar, E.D., Dolev, A. (2012) Foraging behaviour of beef cattle in the hilly terrain of a Mediterranean grassland. The Rangeland Journal 34:163-172.
DOI: http://dx.doi.org/10.1071/RJ11096
Segoli, M., Ungar, E.D., Giladi, I., Arnon, A., Shachak, M. (2012) Untangling the positive and negative effects of shrubs on herbaceous vegetation in drylands. Landscape Ecology 27:899-910.
DOI: http://dx.doi.org/10.1007/s10980-012-9736-1
Segoli, M., Ungar, E.D., Shachak, M. (2012) Fine-scale spatial heterogeneity of resource modulation in semi-arid ‘islands of fertility'. Arid Land Research and Management 26:344-354.
DOI: http://dx.doi.org/10.1080/15324982.2012.694397
Markovics, A., Cohen, I., Muklada, H., Glasser, T.A., T.A. Dvash, L., Ungar, E.D., Azaizeh, H., Landau, S.Y. (2012) Consumption of Pistacia lentiscus foliage alleviates coccidiosis in young goats. Veterinary Parasitology 186:165-169.
DOI: http://dx.doi.org/10.1016/j.vetpar.2011.11.072
Glasser, T.A., Landau, S.Y., Ungar, E.D., Perevolotsky, A., Dvash, L., Muklada, H., Kababya, D. and Walker, J.W. (2012) Foraging selectivity of three goat breeds in a Mediterranean shrubland. Small Ruminant Research 102:7-12.
DOI: http://dx.doi.org/10.1016/j.smallrumres.2011.09.009
Stavi, I., Lavee, H., Ungar, E.D. and Sarah, P. (2012) Grazing-induced modification of a semi-arid rangeland from a two-phase to a three-phase mosaic geo-ecosystem. Arid Land Research and Management 26:79-83.
DOI: http://dx.doi.org/10.1080/15324982.2011.631691
Arnon, A., Svoray, T. and Ungar, E.D. (2011) The spatial dimension of pastoral herding: a case study from the northern Negev. Israel Journal of Ecology & Evolution 57:129-149.
DOI: http://dx.doi.org/10.1560/IJEE.57.1-2.129
Henkin, Z., Ungar, E.D., Dvash, L., Perevolotsky, A., Yehuda, Y., Sternberg, M., Voet H. and Landau S.Y. (2011) Effects of cattle grazing on herbage quality in a herbaceous Mediterranean rangeland. Grass and Forage Science 66:516-525.
DOI: http://dx.doi.org/10.1111/j.1365-2494.2011.00808.x
Stavi, I., Ungar, E.D., Lavee, H. and Sarah, P. (2011) Soil aggregate fraction 1-5 mm: An indicator for soil quality in rangelands. Journal of Arid Environments 75:1050-1055.
DOI: http://dx.doi.org/10.1016/j.jaridenv.2011.04.035
Ungar, E.D., Schoenbaum, I., Henkin, Z., Dolev, A., Yehuda, Y. and Brosh, A. (2011) Inference of the activity timeline of cattle foraging on a Mediterranean woodland using GPS and pedometry. Sensors 11:362-383.
DOI: http://dx.doi.org/10.3390/s110100362
Bachar, A., Al-Ashhab, A., Soares, M.I.M., Sklarz, M.Y., Angel, R., Ungar, E.D. and Gillor, O. (2010) Soil microbial abundance and diversity along a low precipitation gradient. Microbial Ecology 60:453-461.
DOI: http://dx.doi.org/10.1007/s00248-010-9727-1
Landau, S., Azaizeh, A., Muklada, H., Glasser, T., Ungar, E.D., Baram, H., Abbas, N., Markovics, A. (2010) Anthelmintic activity of Pistacia lentiscus foliage in two Middle Eastern breeds of goats differing in their propensity to consume tannin-rich browse. Veterinary Parasitology 173:280-286.
DOI: http://dx.doi.org/10.1016/j.vetpar.2010.07.006
Hanovice-Ziony, M., Gollop, N., Landau, S.Y., Ungar, E.D., Muklada, H., Glasser, T.A., Perevolotsky, A. and Walker, J.W. (2010) No major role for binding by salivary proteins as a defense against dietary tannins in Mediterranean goats. Journal of Chemical Ecology 36:736-743.
DOI: http://dx.doi.org/10.1007/s10886-010-9809-z
Stavi, I., Ungar, E.D., Lavee, H. and Sarah, P. (2010) Variability of soil aggregation in a hilly semi-arid rangeland. Journal of Arid Environments 74:946-953.
DOI: http://dx.doi.org/10.1016/j.jaridenv.2009.12.003
Schiller, G., Ungar, E.D., Cohen, S. and Herr, N. (2010) Water use by Tabor and Kermes oaks growing in their respective habitats in the lower Galilee region of Israel. Forest Ecology and Management 259:1018-1024.
DOI: http://dx.doi.org/10.1016/j.foreco.2009.12.008
Angel, R., Soares, M.I.M., Ungar, E.D. and Gillor, O. (2010) Biogeography of soil archaea and bacteria along a steep precipitation gradient. ISME Journal 4:553-563.
DOI: http://dx.doi.org/10.1038/ismej.2009.136
Brosh, A., Henkin, Z., Ungar, E.D., Dolev, A., Shabtay, A., Orlov, A. and Aharoni, Y. (2010) Energy cost of activities and locomotion of grazing cows: a repeated study in larger plots. Journal of Animal Science 88:315-323.
DOI: http://dx.doi.org/10.2527/jas.2009-2108
Ungar, E.D., Stavi, I., Lavee, H. and Sarah, P. (2010) Effects of livestock traffic on rock fragment movement on hillsides in a semiarid patchy rangeland. Land Degradation & Development 21:92-99.
DOI: http://dx.doi.org/10.1002/ldr.899
Stavi, I., Lavee, H., Ungar, E.D. and Sarah, P. (2009) Ecogeomorphic feedbacks in semiarid rangelands: A review. Pedosphere 19: 217-229.
DOI: http://dx.doi.org/10.1016/S1002-0160(09)60111-9
Stavi, I., Ungar, E.D., Lavee, H. and Sarah, P. (2009) Livestock modify ground surface microtopography and penetration resistance in a semi-arid shrubland. Arid Land Research and Management 23: 237-247.
DOI: http://dx.doi.org/10.1080/15324980903028371
Glasser, T.A., Ungar, E.D., Landau, S.Y., Perevolotsky, A., Muklada, H. and Walker, J.W. (2009) Breed and maternal effects on the intake of tannin-rich browse by juvenile domestic goats (Capra hircus). Applied Animal Behaviour Science 119: 71-77.
DOI: http://dx.doi.org/10.1016/j.applanim.2009.02.028
Segoli, M., Ungar, E.D. and Shachak, M. (2008) Shrubs enhance resilience of a semiarid ecosystem by engineering and regrowth. Ecohydrology 1: 330-339.
DOI: http://dx.doi.org/10.1002/eco.21
Stavi, I., Ungar, E.D., Lavee, H. and Sarah, P. (2008) Grazing-induced spatial variability of soil bulk density and content of moisture, organic carbon and calcium carbonate in a semi-arid rangeland. Catena 75: 288-296.
DOI: http://dx.doi.org/10.1016/j.catena.2008.07.007
Shachak, M., Boeken, B., Groner, E., Kadmon, R., Lubin, Y., Meron, E., Ne'eman, G., Perevolotsky, A., Shkedy, Y., Ungar, E.D. (2008) Woody species as landscape modulators and their effect on biodiversity patterns. Bioscience 58: 209-221.
DOI: http://dx.doi.org/10.1641/B580307
Glasser, T., Landau, S., Ungar, E.D., Perevolotsky, A., Dvash, L., Muklada, H., Kababya, D., Walker, J.W. (2008) A fecal NIRS-aided methodology to determine goat dietary composition in a Mediterranean shrubland. Journal of Animal Science 86: 1345-1356.
DOI: http://dx.doi.org/10.2527/jas.2006-817
Landau S., Giger-Reverdin, S, Rapetti, L., Dvash, L., Dorléans, M., Ungar, E.D. (2008) Data mining old digestibility trials for nutritional monitoring in confined goats with aids of fecal near infra-red spectrometry. Small Ruminant Research 77: 146-158.
DOI: http://dx.doi.org/10.1016/j.smallrumres.2008.03.010
Stavi, I., Ungar, E.D., Lavee, H. and Sarah, P. (2008) Surface microtopography and soil penetration resistance associated with shrub patches in a semiarid rangeland. Geomorphology 94: 69-78.
DOI: http://dx.doi.org/10.1016/j.geomorph.2007.05.008
Giladi, I., Segoli, M. and Ungar, E.D. (2007) The effect of shrubs on the seed rain of annuals in a semiarid landscape. Israel Journal of Plant Sciences 55: 83-92.
DOI: http://dx.doi.org/10.1560/IJPS.55.1.83
Arnon, A., Ungar, E.D., Svoray, T., Shachak, M., Blankman, J. and Perevolotsky, A. (2007) The application of remote sensing to study shrub-herbaceous relations at a high spatial resolution. Israel Journal of Plant Sciences 55: 73-82.
DOI: http://dx.doi.org/10.1560/IJPS.55.1.73
Landau, S., Schoenbaum, I., Barkai, D., Ungar, E.D., Genizi, A., Kigel, J. (2007) Grazing, mulching, and removal of wheat straw in a no-till system in a semi-arid environment. Australian Journal of Agricultural Research 58: 1-6.
DOI: http://dx.doi.org/10.1071/AR06422
Schiller, G., Cohen, S., Ungar, E.D., Y. Moshe and Herr, N. (2007) Estimating water use of sclerophyllous species under East-Mediterranean climate III. Tabor oak forest sap flow distribution and transpiration. Forest Ecology and Management 238: 147-155.
DOI: http://dx.doi.org/10.1016/j.foreco.2006.10.007
Aharon, H., Henkin, Z., Ungar, E.D., Kababya, D., Baram, H. and Perevolotsky, A. (2007) Foraging behaviour of the newly introduced Boer goat breed in a Mediterranean woodland: A research observation. Small Ruminant Research 69: 144-153.
DOI: http://dx.doi.org/10.1016/j.smallrumres.2006.01.004
Schiller, G., Shklar, G., Ungar, E.D., Al-Omari, A., Zyadin, A.F. and Korol, L. (2006) Genetic diversity assessment by random amplified polymorphic DNA of oaks: 3. Quercus calliprinos Webb. in Israel and Jordan. Israel Journal of Plant Sciences 54: 137-148.
DOI: http://dx.doi.org/10.1560/IJPS_54_2_137
Brosh, A., Henkin, Z., Ungar, E.D., Dolev, A., Orlov, A., Yehuda, Y. and Aharoni, Y. (2006) Energy cost of cows' grazing activity: Use of the heart rate method and the Global Positioning System for direct field estimation. Journal of Animal Science 84: 1951-1967.
DOI: http://dx.doi.org/10.2527/jas.2005-315
Griffiths, W.M., Alchanatis, V., Nitzan, R., Ostrovsky, V., Ben-Moshe, E., Yonatan, R., Brener, S., Baram, H., Genizi, A. and Ungar, E.D. (2006) A video and acoustic methodology to map bite placement at the patch scale. Applied Animal Behaviour Science 98: 196-215.
DOI: http://dx.doi.org/10.1016/j.applanim.2005.10.006
Ungar, E.D., Ravid, N., Zada, T., Ben-Moshe, E., Yonatan, R., Baram, H. and Genizi, A. (2006) The implications of compound chew-bite jaw movements for bite rate in grazing cattle. Applied Animal Behaviour Science 98: 183-195.
DOI: http://dx.doi.org/10.1016/j.applanim.2005.09.001
Ungar, E.D. and Rutter, S.M. (2006) Classifying cattle jaw movements: Comparing IGER Behaviour Recorder and acoustic techniques. Applied Animal Behaviour Science 98: 11-27.
DOI: http://dx.doi.org/10.1016/j.applanim.2005.08.011
Landau, S., Glasser, T., Muklada, H., Dvash, L., Perevolotsky, A., Ungar, E.D. and Walker, J.W. (2005) Fecal NIRS prediction of dietary protein percentage and in vitro dry matter digestibility in diets ingested by goats in Mediterranean scrubland. Small Ruminant Research 59: 251-263.
DOI: http://dx.doi.org/10.1016/j.smallrumres.2005.05.009
Henkin, Z., Gutman, M., Aharon, H., Perevolotsky, A., Ungar, E.D. and Seligman, N.G. (2005) Suitability of Mediterranean oak woodland for beef herd husbandry. Agriculture, Ecosystems and Environment 109: 255-261.
DOI: http://dx.doi.org/10.1016/j.agee.2005.03.004
Ungar, E.D., Henkin, Z., Gutman, M., Dolev, A., Genizi, A. and Ganskopp, D. (2005) Inference of animal activity from GPS collar data on free-ranging cattle. Rangeland Ecology and Management 58: 256-266.
DOI: http://dx.doi.org/10.2111/1551-5028(2005)58[256:IOAAFG]2.0.CO;2
Ungar, E.D., Seligman, N.G. and Noy-Meir, I. (2004) Grass grows, the cow eats: a simple grazing systems model with emergent properties. Journal of Biological Education 38: 178-182.
DOI: http://dx.doi.org/10.1080/00219266.2004.9655938
Schiller, G., Y. Moshe and Ungar, E.D. (2004) Transpiration of Cupressus sempervirens L. as influenced by canopy structure. Israel Journal of Plant Sciences 52: 9-19.
DOI: http://dx.doi.org/10.1560/TCGF-4UX6-YXCP-UXCP
Schiller, G., Ungar, E.D., Yosef, M., Cohen, S. and Cohen, Y. (2003) Estimating water use by sclerophyllous species under east Mediterranean climate II. The transpiration of Quercus calliprinos Webb. in relation to silvicultural treatments. Forest Ecology and Management 179: 483-495.
DOI: http://dx.doi.org/10.1016/S0378-1127(02)00536-4
Schiller, G., Ungar, E.D. and Cohen, Y. (2002) Estimating the water use of a sclerophyllous species under an East-Mediterranean climate. I. Response of transpiration of Phillyrea latifolia L. to site factors. Forest Ecology and Management 170: 117-126.
DOI: http://dx.doi.org/10.1016/S0378-1127(01)00785-X
Ungar, E.D. and Griffiths, W.M. (2002) The imprints created by cattle grazing short sequences of bites on continuous alfalfa swards. Applied Animal Behaviour Science 77: 1-12.
DOI: http://dx.doi.org/10.1016/S0168-1591(02)00021-7
Ungar, E.D. (2002) BokerTov: A record-keeping and analysis program for beef herds at pasture. Agronomy Journal 94: 493-500.
DOI: http://dx.doi.org/10.2134/agronj2002.4930
Ungar, E.D., Ravid, N. and Bruckental, I. (2001) Bite dimensions for cattle grazing herbage at low levels of depletion. Grass and Forage Science 56: 35-45.
DOI: http://dx.doi.org/10.1046/j.1365-2494.2001.00244.x
Sternberg, M., Gutman, M., Perevolotsky, A., Ungar, E.D. and Kigel, J. (2000) Vegetation response to grazing management in a Mediterranean herbaceous community: a functional group approach. Journal of Applied Ecology 37: 224-237.
DOI: http://dx.doi.org/10.1046/j.1365-2664.2000.00491.x
Schiller, G., Korol, L., Ungar, E.D., Zehavi, A. and Climent, M.J. (1999) Canary Islands pine (Pinus canariensis Chr. Sm. Ex Dc.) 1. Differentiation among native populations in their isoenzymes. Forest Genetics 6: 257-276.
URL: http://www.tuzvo.sk/files/fg/volumes/1999/FG06-4_257-276.pdf
Ungar, E.D. and Ravid, N. (1999) Bite horizons and dimensions for cattle grazing herbage to high levels of depletion. Grass and Forage Science 54: 357-364.
DOI: http://dx.doi.org/10.1046/j.1365-2494.1999.00188.x
Perevolotsky, A., Landau, S., Kababia, D. and Ungar, E.D. (1998) Diet selection in dairy goats grazing woody Mediterranean rangeland. Applied Animal Behaviour Science 57: 117-131.
DOI: http://dx.doi.org/10.1016/S0168-1591(97)00120-2
Ginguld, M., Perevolotsky, A. and Ungar, E.D. (1997) Living on the margins: livelihood strategies of Bedouin herd-owners in the Northern Negev, Israel. Human Ecology 25: 567-591.
DOI: http://dx.doi.org/10.1023/A:1021833907673
Ungar, E.D., Ravid, N., Genizi, A. and Methorst, R. (1997) Measurement error in the estimation of intake from herbage patches by non-fistulated heifers on apparently uniform swards. Annales de Zootechnie 46: 349-359.
DOI: http://dx.doi.org/10.1051/animres:19970406
Spharim, I. and Ungar, E.D. (1995) Morphological analysis in agricultural R&D: A technologist's approach to the definition and economic evaluation of technologies. R&D Management 25: 351-363.
DOI: http://dx.doi.org/10.1111/j.1467-9310.1995.tb01339.x
Laca, E.A., Ungar, E.D. and Demment, M.W. (1994) Mechanisms of handling time and intake rate of a large mammalian grazer. Applied Animal Behaviour Science 39: 3-19.
DOI: http://dx.doi.org/10.1016/0168-1591(94)90011-6
Ungar, E.D., Seligman, N.G. and Demment, M.W. (1992) Graphical analysis of sward depletion by grazing. Journal of Applied Ecology 29: 427-435.
URL: http://www.jstor.org/stable/2404511
Laca, E.A., Ungar, E.D., Seligman, N.G. and Demment, M.W. (1992) Effects of sward height and bulk density on bite dimensions of cattle grazing homogeneous swards. Grass and Forage Science 47: 91-102.
DOI: http://dx.doi.org/10.1111/j.1365-2494.1992.tb02251.x
Laca, E.A., Ungar, E.D., Seligman, N.G., Ramey, M.R. and Demment, M.W. (1992) An integrated methodology for studying short-term grazing behaviour of cattle. Grass and Forage Science 47: 81-90.
DOI: http://dx.doi.org/10.1111/j.1365-2494.1992.tb02250.x
Ungar, E.D., Kletter, E. and Genizi, A. (1992) Conservative response and stress-damage interactions in cotton reproductive development. Agronomy Journal 84: 382-386.
DOI: http://dx.doi.org/10.2134/agronj1992.00021962008400030006x
Ungar, E.D., Genizi, A. and Demment, M.W. (1991) Bite dimensions and herbage intake by cattle grazing short hand-constructed swards. Agronomy Journal 83: 973-978.
DOI: http://dx.doi.org/10.2134/agronj1991.00021962008300060010x
Ungar, E.D., Kletter, E. and Genizi, A. (1989) Early season development of floral buds in cotton. Agronomy Journal 81: 643-649.
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Ungar, E.D. and Noy-Meir, I. (1988) Herbage intake in relation to availability and sward structure: grazing processes and optimal foraging. Journal of Applied Ecology 25: 1045-1062.
URL: http://www.jstor.org/stable/2403765
Ungar, E.D., Wallach, D. and Kletter, E. (1987) Cotton response to bud and boll removal. Agronomy Journal 79: 491-497.
DOI: http://dx.doi.org/10.2134/agronj1987.00021962007900030017x
Remote Sensing ARO 250117 Lectures:
Maxim Shoshani
Gil Sapir (from Maxim)
Noam Levin
David Helman
Ron Drori
Gilad Weil