Department: ZEF C


Manske G.G.B., J.I. Ortiz-Monasterio and P.L.G. Vlek.  2001.  Techniques for measuring genetic diversity in roots.  In: Reynolds et al. (eds.): Application of Physiology in Wheat Breeding. CIMMYT; Mexico.   pp. 208-218. 
Ntare, B.R., J.H. Williams and D. Fatondji.  2001.  Evaluation of groundnut genotypes for heat tolerance under field conditions in the Sahelian environment using a simple physiological model for yield.  Journal of Agricultural Science, Cambridge, 136   .
Schmitt CB, Broll GE, Kuyper TW & Onguene NA.  2001.  Mycorrhizal selectivity of three timber tree species in the tropical rainforest of South Cameroon.  Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 96, .
Sommer, R., T.D. de A. Sá, K. Vielhauer, H. Fölster and P.L.G. Vlek.  2001.  Water and nutrient balance under slash-and-burn agriculture in the Eastern Amazon, Brazil - The role of a deep rooting fallow vegetation.  In: W.J.Horst, M.K.Schenk, A.Bürkert, N.Claassen, H.Flessa, W.B.Frommer, H.E.Goldbach, H.-W.Olfs, V.Römheld, U.Sattelmacher, U.Schmidhalter, S.Schubert, N.v.Wirén, and L.Wittenmeyer (eds.): Plant Nutrition Food Security and Sustainability of Agro-Ecosystems through Basic and Applied Research. Kluwer Academic Publishers.   1014-1015. 
van de Giesen, N.  2001.  Characterization of West African shallow flood plains with L- and C-Band radar.  IAHS Publication 267: Remote Sensing and Hydrology 2000, : 365-367   .
van de Giesen, N., L.J. Mata, P. Döll, A. Hoekstra, M. Pfeffer and J.A. Ramirez.  2001.  Modeling Water Availability: Scaling Issues.  In: E. Ehlers and T. Krafft (eds.): Understanding the Earth System: Compartments, Processes and Interactions. Springer Verlag.   245-255. 
van Edig, A., W. Laube and N. van de Giesen.  2001.  Internationale und nationale Wasserkonflikte: Institutionelle und rechtliche Hintergründe der Wassernutzung des Voltaflusses am Beispiel Ghanas.  IHP/OHP Berichte, Sonderheft 12: Hydrological Challenges in Transboundary Water Resources Management, .
Vlek, P.L.G., D. Hillel, J.C. Katyal and W. Seiler.  2001.  Water deficiency and desertification.  In: Ehlers and Krafft (eds.): Understanding the Earth System. Springer Berlin,Germany.   275 – 279. 
Vlek, Paul L.G., D. Hillel and S. Teimann.  2001.  Land Degradation: Causes and Prevention.  In: Virchow and Von Braun (eds.): Villages in the Future. Springer Verlag, Berlin.   Ch. 25: 169-171. 


Bationo, A., S. P. Wani, C. L. Bielders, P. L. G. Vlek and A. U. Mokwunye.  2000.  Crop Residue and Fertilizer Management to Improve Soil Organic Carbon Content, Soil Quality and Productivity in the Desert.  In: R. Lal, H. Eswaran, J. M. Kimble and B. A. Stewart (eds.): Global climate change and tropical ecosystems. Lewis Publishers CRC pressBoca Raton, Fl.USA.  
Gole. T.W., T. Demel, S. Edwards and M. Olson.  2000.  Woody plant and avian species diversity in a dry Afromontane forest on the central olateau of Ethiopia: biological indicators for conservation.  Ethiopian Journal of Natural Resources, 2 (2)   .
Gorfu, A., R.F. Kuehne, D.G. Tanner and P.L.G. Vlek.  2000.  Biological nitrogen fixation in Faba bean (Vicia faba L.) in the Ethiopian highlands as affected by P fertilization and inoculation.  Biol. Fert. Soil, 32   : 1-7   .
Shirokova Yu., I. Forkutsa and N. Sharafutdinova.  2000.  Use of Electrical Conductivity Instead of Soluble Salts for Soil Salinity Monitoring in Central Asia.  Irrigation and Drainage Systems, 14 (3)   : 199-206   . Further Information
Sommer, R., M. Denich and P.L.G. Vlek.  2000.  Carbon storage and root penetration in deep soils under small-farmer land-use systems in the Eastern Amazon region, Brazil.  Plant Soil, 219   : 231-240   .
van de Giesen, N., L.J. Mata, P. Doell, A. Hoekstra, M. Pfeffer and J. Ramirez.  2000.  Modelling Water Availability: Scaling Issues.  In: Ehlers, E. and T. Krafft (eds.): Understanding the Earth System. Springer Verlag.   245-253. 
van de Giesen, N., T.J. Stomph and N. de Ridder.  2000.  Scale Effects on Hortonian Overland Flow and Rainfall-Runoff Dynamics in a West African Catena Landscape.  Hydrological Processes, 14(1)   : 165-175   .
Wickel, A.J., Jackson. T.J. and Wood, E.F.  2000.  Multi-temporal monitoring of soil moisture with RADARSAT SAR during the 1997 Southern Great Plains Hydrology Experiment.  International Journal of Remote Sensing, 22 (8)   : 1571-1583   . Further Information


Egle, K., G. Manske, W. Roemer and P.L.G. Vlek.  1999.  Improved phosphorus efficiency of three new wheat genotypes from CIMMYT in comparison with an older Mexican variety.  J. Plant Nutr. Soil Sci., 162   : 353-358   .
Gole, T.W.  1999.  The Values of Biodiversity and Ecosystem Services: Bases for Sustainable Development and Maintenance of Healthy Life-support System.  Walia, 20   : 10-18   .
Kato, M.S.A ., O.R. Kato, M. Denich and P.L.G. Vlek.  1999.  Fire-free alternatives to slash-and-burn for shifting cultivation in the eastern Amazon region: the role of fertilizers.  Field Crops Research, 62   : 225-237   .
Mandal, B., P.L.G. Vlek and L.N. Mandal.  1999.  Beneficial effects of blue-green algae and Azolla, excluding supplying nitrogen, on wetland rice fields: a review.  Biology & Fert. of Soils, 28   : 329-342   .
Morato, E., M. Garcia and L.A.O. Campos.  1999.  Biologia de Centris Fabricius (Hymenoptera, Anthophoridae, Centridini) em matas contínuas e fragmentos na Amazônia Central.  Rev. Bras. Zool. Sao Paulo, 16(4), : pp 213 - 222   .
Schellekens, J., Scatena, F.N., Bruijnzeel, L.A. and Wickel, A.J.  1999.  An application of the Gash and Rutter models of rainfall interception in a tropical maritime forest, eastern Puerto Rico.  Journal of Hydrology, 225 (3-4)   : 168-184   . (Open Access)   Further Information
Schultz, C., G. Ginting, A.M. Moawad and P.L.G. Vlek.  1999.  The role of (vesicular-) arbuscular mycorrhiza in the weaning stage of micropropagated oil palms.  Mitteilungen aus der Biologischen Bundesanstalt für Land- und Forstwirtschaft Berlin-Dahlem, Heft 363.   74. 
Schultz, C., G. Ginting, A.M. Moawad und P.L.G. Vlek.  1999.  Verbesserung der Überlebensrate in vitro vermehrter Ölpalmen in der Akklimatisierungsphase durch (V)A-Mykorrhizapilze.  In: Backhaus, G.F. und F. Feldmann (eds.): Arbuskuläre Mykorrhiza.  
Schultz, C., S.L. Subronto, A.M. Moawad and P.L.G. Vlek.  1999.  The role of (vesicular-) arbuscular mycorrhiza to improve the hardening of in vitro propagated oil palm plantlets to natural growth conditions.  Indonesian Journal of Oil Palm, .
Tuladhar, J. K.  1999.  Response of wheat to Boron application in Sipaghat Soil.  Journal of Nepal Agricultural Research. SAS-Nepal, Khumaltar, Volume 3:1, .


Bationo, A., and P.L.G. Vlek.  1998.  The Role of Nitrogen Fertilizers Applied to Food Crops in the Sudano-Sahelian Zone of West Africa.  In: Renard, G., Neef, A., Becker, K. and von Oppen, M. (eds.): Soil Fertility Management in West African Land Use Systems. Proc. Regional Workshop Univ. Hohenheim, ICRISAT Sahelian Centre and INRAN 4-8 March 1997, Niamey, Niger. Margraf, Weikersheim.   41-51. 
Sanetra, C.M., O. Ito, S.M. Virmani, and P.L.G. Vlek.  1998.  Remobilization of nitrogen from senescing leaves of pigeonpea (Cajanus cajan (L.) Millsp.): genotypic differences across maturity groups.  J. Exp. Bot., 49 (322)   : 853-862   .
Wick, B., R.F. Kühne, and P.L.G. Vlek.  1998.  Soil microbiological parameters as indicators of soil quality under improved fallow management systems in south-western Nigeria.  Plant and Soil, 202, 1998   : 97-107   .


Vlek, P.L.G., R.F. Kühne, and M. Denich.  1997.  Nutrient resources for crop procution in the tropics.  Phil. Trans. R. Soc. Lond., B 352   : 975-985   .
Wiesenmüller, J., M. Denich, and P.L.G. Vlek.  1997.  Bedeutung des Wurzelsystems für die Regeneration der Brachevegetation in Nordost-Brasilien. (Significance of the root system for the regeneration of the fallow vegetation on N. E. Brazil).  In: W. Merbach (eds.): Rhizosphärenforschung, Umweltstreß und Ökosystemstabilität. B.G. Teubner Verlagsges. Stuttgart.   84-89. 


Edi Premono, M., A.M. Moawad, and P.L.G. Vlek.  1996.  "Effect of phosphate-solubilizing Pseudomonas putida on the growth of maize and its survival in the rhizosphere".  Indones. J. Crop Sci., 11 (1)   : 13-23   .


El-Zahaby, E.M., S.H. Chien, N.K. Savant, P.L.G. Vlek, and A.U. Mokwunye.  1982.  Effect of Pyrophosphate on Phosphate Sorption and Ammonia Volatilization by Calcareous Soils Treated with Ammonium Phosphates.  Soil Sci. Soc. Am. J., 46   : 733-740   .


Salmon, J.M., M.A. Friedl, S. Frolking, D. Wisser, E.M. Douglas.  Global rain-fed, irrigated, and paddy croplands: A new high resolution map derived from remote sensing, crop inventories and climate data.  International Journal of Applied Earth Observation and Geoinformation , 38   : 321-334   .