Cation-active soil conditioners promoting plant growth - contg phyto-toxic acid amides, N-heterocycles, imidazoline or imidazolinium derivs and opt polymer flocculants and carriers

Compsns. for soil or plant treatment in pre- or post-emergent state contain >=1 of cpds. of formulae I, II, III R - (CO)p - (NR3XH - (R4)m -)n N(R1R2R3X) (i); (where R is 10-24 C alkyl, alkenyl or alkedienyl; R1 and R2 are H, 2-16C alkyl, alkenyl, alkadienyl or 2-18C hydrocarbyl contg. an alpha -keto gp.; R3 is r1 or R2; Y1 is -CH=, -O- or -N= ; R10 and R11 are H, Me, Et, Pr or oxyethyl, oxypropyl, aminoethyl or aminopropylf R5, R6 and R7 are H or R5 and R6 and/or R6 and R7 form a -CH=CH-CH=CH- gp; R8 and R9 are H or Me; X is halide, NO3, PO4, HPO4, acetate, formate, propionate, tartrate, sebacate, CO3, HCO3 or OH; R4 is a methylene- or ethylene glycol ether gp; Y2 is -O- or -NH-, m is integer 1 to 6; n is 0 to 6; p is 0 or 1; R3, X and R11 may be absent and dotted lines may denote opt. bonds), opt. used with reactive tensides, high mol. wt. flocculating agents, soil sterilisers, inert or active carriers, esp. artificial fertilisers and opt. plant hormones.