Click on a headline below to view the desired abstract. The print version    opens all abstracts at once. Amounts of whey and their use in Germany Liquid whey in pig feeding Investigations on composition of whey products as well as on effects of sulfate concentrations in milk replacers on faeces composition in calves Food refusals - nutrient content and andisired substances Controlling risks management when processing organic secondary waste products from the food industries: a modern recycling plant as an example Utilization of garbage in pig fattening On particle size of diets for pigs based on by-products/refusals from food production Feeding value of crambe by-products Fermented rye bran - an interesting ingredient and an example for an significant technology Unconventional/unusual feedstuffs in animal nutrition - a variety by means of examples Controlling associations for by-products - systematic improvement of marketing -       O. Maier-Loeper Landwirtschaftskammer Westfalen-Lippe, Niederbergheimer Straße 24, D-59494 Soest The quantity of by-products, which are fed to pigs, has largely increased in the last few years. Due to this fact, four controlling associations for by-products have been established by the Landwirtschaftskammer Westfalen-Lippe. The starting point for this project is the fact that many farmers are hesitating to feed by-products to pigs, because they do not know the feeding value and the feeding strategies, which have to be applied. The procedure of controlling is as follows: in the companies, which produce the mixtures of by-products (for example rests of meal, pizza, ice cream) samples are taken, which are analysed for dry matter, lysine, methionine, cystine, threonine, metabolizable energy (MJ ME), minerals (Ca, P, Na) and acidity. The costs of the analyses are paid by the company. The farmers get every month information on the current analysis datas. This system, which is controlled by the Landwirtschaftskammer Westfalen-Lippe as neutral institution, anables a continuous increase of by-product feeding to pigs.   Zusammenfassung und Schlussfolgerung Zusammenfassend ist festzustellen, dass Kontrollinggemeinschaften von Nebenprodukten ein von der Praxis sehr gut angenommenes System darstellen, um die Vermarktungschancen von Nebenprodukten zu verbessern. Insbesondere die neutral festgestellten Informationen über die Inhaltsstoffe der Nebenprodukte und die regelmäßige Verschickung von Infobriefen sorgen für eine breite Transparenz und eine positive Einstellung der Landwirte gegenüber Nebenprodukten. Die Möglichkeit, Futterrationen für Mastschweine bedarfsgerecht und kostengünstig zusammenzustellen, wird deutlich verbessert. Die Veredelung von Nebenprodukten ist eine ökologisch und ökonomisch sehr elegante Art des Recyclings. Bei in Zukunft weiter steigenden Mengen von Nebenprodukten kommt daher der Vermarktung eine noch größere Bedeutung zu. In einer Weiterentwicklung dieses Kontrollingsystems wäre es denkbar, den Landwirten regelmäßig Infobriefe zuzusenden, in denen mehrere Anbieter von Nebenprodukten mit den neuesten Analysewerten und Produktpreisen in einem aktuellen Vergleich gegenübergestellt werden. Investigations on the use of liquid conserved sugar beets in cattle Expandat� of dried beet pulp for cattle feeding Conceptions of quality assurance for by-products of sugar beet processing Importance of the technology on utilization and quality of molasses Use of by-products in liquid pig feeding