Abstract: A cationactive soil-conditioning composition which comprises one or more active ingredients having the formulae ##STR1## wherein R is a C.sub.10-24 linear or branched alkyl, alkenyl or alk-dienyl group; R.sub.1 is hydrogen, R.sub.2 is hydrogen, C.sub.2-18 as a linear or branched alkyl, alkenyl, alk-dienyl or C.sub.2-18 -alpha-keto-group, R.sub.3 is a hydrogen; R.sub.3 ' if present is hydrogen or C.sub.1-8 alkyl; X and X' are formiate, acetate, propionate, hydrophosphate, hydroxyl, halogenide or nitrate; R.sub.4 methylene, ethylene or a polyglycol ether-group; m is a cardinal number from 1-6 and n is an integer from 1-6; R' is C.sub.10-24 linear or branched alkyl, alkenyl or alk-dienyl; R.sub.5, R.sub.6, R.sub.7 if present, is a hydrogen or taken together two substituents therefrom a CH.dbd.CH--CH.dbd.CH-- group; R.sub.8, R.sub.9, if present, hydrogen or methyl; Y.sub.1 is a --CH.dbd. or oxygen; Y.sub.

Abstract: A protein-vitamin concentrate having a high proportion of dry yeast and a protein content of at least 50% and particularly rich in B-vitamins, is produced by cultivating yeast in a culture medium containing animal or vegetable fat as a source of carbon, at a pH of 4 to 6 and a temperature of 30.degree. to 40.degree.C. and an aeration intensity of 150 to 300 cubic meters of air per square meter of fermenter base area per hour, the culture containing also an ammonium salt or carbamide as a source of nitrogen, the nitrogen content of the culture medium being 0.1-0.2%, the N:P ratio being 4:1, potassium and chloride ions being present in the form of 0.1-0.2% KCl, and Mg and SO.sub.4 ions being present as 0.080-0.1% MgSO.sub.4.

Abstract: Soil conditioning compositions in which the active component is a reactive tenside being (a) condensation products, having a molecular weight under 15,000, of one or more of (i) ethylenediamine, diethylenetriamine, propylenediamine, dipropylenediamine, guanidine, dicyandiamide, N-aminoethyl alkylamines, N-aminoethyl alkyleneamines, N-aminoethyl alkyldienamines, N-aminopropyl alkylamines, N-aminopropyl alkyleneamines, N-aminopropyl alk-dien-ylamines, imidazoline, imidazole, 1-aminoethyl-imidazoline, 1-aminoethyl-2-alkyl-2-imidazoline, and 1-aminoethyl-2-alkyl-2-imidazoline, and 1-aminoethyl-2-alkylene-2-imidazoline, with one or more of (ii) formaldehyde, acetaldehyde, propionaldehyde, C.sub.2-6 dihalogenealkanes; (b) alkyl- or alkylcarboxyamide end group-containing derivatives of reactions between the components of (a) which are partially or totally alkylated with C.sub.