Volume 71 Ljubljana,  1998 CONTENTS   Ob 90-letnici zaslužnega prof. dr. Franca Janežiča Lea Milevoj, Jože Maček Abstract Effect of some fungicides and insecticides on aphids (Aphididae) Lea MILEVOJ Abstract Das Massenauftreten der Porreeminierfliege [Napomyza gymnostoma (Loew) - Diptera, Agromyzidae] in Slowenien Gabrijel SELJAK  Abstract The influence of soil (pH) reaction on nematode population in soil Gregor UREK  Abstract ‘Vigred’ - a new domestic sweet cherry variety (Prunus avium L.) Julija SMOLE , Valentina USENIK Abstract Propagation o Prunus pumila L. rootstock with wood cuttings with use of IBA Irena HOČEVAR , Franci ŠTAMPAR , Metka HUDINA Abstract Detecting oxidative stress in leaves of apple tree and white clover by analysis of ascorbic acid and pigments using high performance liquid chromatography Helena ŠIRCELJ , Franc BATIČ Abstract CO2 exchange rate of apple fruitlets before the abscission M. STOPAR , A. GREGORČIČ, F. BATIČ  Abstract Composite samples in environmental studies Katarina KOŠMELJ  Abstract Prediction of blossoming of apple tree (Malus domestica Borkh) BY phenological models Lučka KAJFEŽ-BOGATAJ , Klemen BERGANT Abstract Influence of different data densities on the mapping of agroclimatological parameters - case of precipitation Klemen BERGANT , Lučka KAJFEŽ-BOGATAJ Abstract Content and composition of pentose in buckwheat flour (Fagopyrum esculentum Moench) Zlata LUTHAR Abstract Formation and study of collections of selected alternative crops Anna MICHALOVÁ Abstract Variability of selected characteristics in sets of buckwheat, millet and amaranth; selection of perspective genotypes and comparison of their nutritive value Anna MICHALOVÁ Abstract Screening of aromatic secondary metabolites and glycoalcaloids in two pvyntn - infected potato cultivars (Solanum tuberosum L.) Dea BARIČEVIČ , Breda SIMONOVSKA  , Adolf KRAŠNA  and Alenka ZUPANČIČ Abstract Effects of seeding rate and time of cut on the yield  and quality of sudangrass (Sorghum sudanense (Piper) Stapf.) Branko KRAMBERGER , Anastazija GSELMAN Abstract Symbiotic efficiency and storage stability of molasses based liquid inoculant formulations for soybean (Glycine max L., Merr.) Janez I. HACIN ,  Jože SPANRING  Abstract Hydroponic  growing of lettuce (Lactuca sativa L.) using  a  thin layer system with different substrates Jože OSVALD , Mirjam GANTAR , Nino PETROVIČ Abstract Hydroponic lettuce production (Lactuca sativa L.) on terraces in rockwool Jože OSVALD , Jernej DEMŠAR , Nino PETROVIČ Abstract Local heating in the growing of winter vegetables Jože OSVALD , Avgust VRŠČAJ Abstract Grapevine variety identification by means of ampelographic and phyllometric descriptors Irma TOMAŽIČ , Zora KOROŠEC-KORUZA Abstract Spremljanje rasti in razvoja cepljenk vinske trte (Vitis sp.) v prvem letu po cepljenju (Monitoring of the grapevine (Vitis sp.) grafts development first year after grafting) Drago TOZAN , Zora KOROŠEC-KORUZA, Irma TOMAŽIČ Abstract Vključevanje člankov iz Zbornika Biotehniške fakultete - kmetijstvo v podatkovne zbirke AGRICOLA, AGRIS in CAB ter njihovo prekrivanje (Inclusion of articles from periodical Research Reports - Biotechnical Faculty University of LJUBLJANA - AGRICULTURAL ISSUE IN THE BIBLIOGRAPHICAL DATABASES AGRICOLA, AGRIS, CAB and their overlapping)  Karmen STOPAR , Teja KOLER-POVH , Jana BRADAČ , Franci KRAMARIČ Abstract