Vinegar; any quantity you like
2 Lt:Water
Dish soap liquid: any quantity you like
Salt: 200g
Mix very good in a wide bowl, and pour it in spray bottle and spray it on your unwanted grass
you can buy vinegar in any super market, or any baking material shop
Caution:
Please avoid spreading the mixture on your crops to avoid killing them because this mixture is very powerful and can harm your crops if proper care are not taken.