Application of Electro-Ultrafiltration (EUF) in Agricultural Production Proceedings of the First International Symposium on the Application of Electro-Ultrafiltration in Agricultural Production, organized by the Hungarian Ministry of Agriculture and the C

The Symposium was organized by the Hungarian Ministry of Agriculture and the Central Research Institute for Chemistry of the Hungarian Academy of Sciences. This arduous task was coordinated by Dr. Varju to whom I wish to express my appreciation for his whole-hearted assistance. After the Symposium the participants had the opportunity to visit the vineyards and cellars of the 'Balatonboglar' state holding which proved of great interest. The First International EUF Symposium owes its success to the excellent cooperation between the Biintehof Agricultural Research Station and the Hungarian Ministry of Agriculture, including the Central Research Institute for Chemistry of the Hungarian Academy of Sciences. The objective of the Symposium was to present the first results and experience gained with the EUF procedure, so that the papers delivered are only a survey of the present-day state of knowledge. The bulk of the work of editing, including the selection of the articles, fell on Prof. Dr. van Diest, Wageningen, for whose valuable advice and untiring efforts I wish to record my special thanks. Some of the papers presented at the Symposium have already been published elsewhere and they will not appear in this issue. Front Matter....Pages 1-3 Preface....Pages 5-6 Electro-ultrafiltration of aqueous soil suspension with simultaneously varying temperature and voltage....Pages 7-23 Reproducibility of Ca, K, Na and P contents in the different EUF fractions....Pages 25-33 Test of the electro-ultrafiltration method’s applicability in soil analysis. Reproducibility of the method....Pages 35-41 The effect of P source on P desorption by electro-ultrafiltration (EUF) on two different soils....Pages 43-48 K desorption in an external electric field as related to clay content....Pages 49-54 Effect of soil properties and soil management on the EUF-N fractions in different soils under uniform climatic conditions....Pages 55-61 Rapid determination of EUF-extractable nitrogen and boron....Pages 63-66 Fixed NH 4 -N in relation to EUF-extractable K....Pages 67-71 Preliminary investigations on available and potentially available phosphorus using eleetro-ultrafiltration (EUF)....Pages 73-78 Influence of soil type and potassium and magnesium fertilization on the release of potassium and magnesium by electro-ultrafiltration and ammonium acetate-lactate extraction....Pages 79-83 A comparison of electro-ultrafiltration and quantity/intensity measurements of soil potassium with its uptake by ryegrass in Scottish soils....Pages 85-94 EUF-K as measure of K availability index for Tamil Nadu soils (India)....Pages 95-104 Application of the EUF procedure in grape production....Pages 105-113 Application of the EUF procedure in sugar beet cultivation....Pages 115-127 Factors of plant nutrient availability relevant to soil testing....Pages 129-138