Requirement 1: a method for improving the efficacy of herbicide (b) under severe water conditions, characterized in that it comprises (a) stages of providing at least one herbicide (b) and at least one carbamate (a),Selected from the group of diethyl methacrylic acid (MGDA； A1),Ethyl glutamate (glda； A2),Pyridine formate (IDS； A3),N - (2-hydroxy) pyridine (Heida； A4),Ethylenediamine-N, N-SODIUM dichloride (EDDS； A5) and its salts； (b) the components (a) and (b) of the dilution water, in which the concentration of dissolved calcium, magnesium, iron salt and aluminum in the water exceeds 120 ppm； and (c) the diluted mixture is applied in the area concerned. 115. Claim 5: method of processing one to three claims, characterized by the concentration of dissolved calcium, magnesium, iron and aluminum salts in water exceeding 180 ppm. Claim 7: a method of meeting any of the above requirements,It is characterized by the selection of herbicides (b) from (B1) a (B5) (B1): "(B1) the selection of aromatic acid herbicides from dibenzo diazo, naparam, clovenin, diganba, Di, 3, 6-trichlorobenzoic acid (2, 3, 6-tb),Tricamba, bispyribac, pyrminobac, pyrithiobac, chlorothal, aminopyralid, halauxifen, picloram, quinorac, quinmerac or aminocyclepyrochlor； (B2) phenylacetic acid herbicide selected from 4-chlorophenol-tetraethyl acid (4-CPA)；2,4-dichlorophenylacetic acid (2,4-D),Acetic acid (3,4-dichlorophenyl) acetic acid (3,4-da),MCPA (4 - (4-chloro-o-thyroid) butadiene acid)MCPA tioetilo, acid (2,4,5-trichlorophenyl) acetic anhydride (2,4,5-T)；4-cpb, 4 - (2,4-dichlorophenyl) butyl (2,4-dichlorophenyl),4 - (3,4-dichlorophenyl) butyl (3,4-dichlorophenyl),4 - (4-chloro-o-thyroid) butadiene (mCPP),4 - (2,4,5-trichlorophenyl) butyl (2,4,5-tributyl) acid；2 - (4-chlorophenyl) propane (4-cpp),Dichloropropyl ester, dichloropropane-p, 4 - (3,4-dichlorophenyl) butadiene (3,4-dp),Phenol, mecoprop, Mecoprop-P； chlorozifop, Clodinafop, clophop, cyhalofp, Diclofop, fenxaprop, fenxaprop-p, fentiarp,
