How to plant sweet potatoes to remove weeds?

How to get rid of weeds when planting sweet potatoes? Please give instructions to sweet potato fields to control weeds like this: first, grass growing and killing (Rekra) 70% wettable powder, 200 grams of 250 grams per mu of water 450 million liters of water shall be applied immediately before or after planting sweet potatoes. The main control measures include Triticum aestivum, Magnolia mandshurica, barnyardgrass, dogtail grass, ryegrass, quinoa, Polygonum polygonum, etc., which are safe for the following crops. Second, Duer 72% EC, 0.1-0.15 litres per mu to 450-600 litres of water, applied immediately before or immediately after planting after soil preparation. Shallow soil should be mixed under dry conditions. It is safe for the following crops to control barnyardgrass, Magnolia, Euphorbia angustifolia, Kentucky bluegrass, eyebrow grass, arm grass, ryegrass, tiger grass, mustard, small wild sesame, oil sedge, water thorn needle, dodder and so on. Third, Dahuili (alachlor, naphthylamine) 50% wettable powder, 100-150 grams per mu, 600-750 liters of water, applied immediately before or after planting sweet potatoes, and irrigated immediately after application under dry conditions. Mainly control wild oats, barnyard grass, horse tang, dogtail grass, see wheat Niang, Kentucky bluegrass, cow tendon grass, wild quinoa, pig seedlings, wisps and so on. The dosage of 50% Dahuili is less than 150 grams per mu, which is safe for the following crops. More than this amount, the next crop of rice, wheat, barley, sorghum, corn and other Gramineae crops will cause drug damage. Other herbicides include trifluralin, fruit, high efficiency cover grass energy, Hornus, Jing Jing Shu Di, Jing Gao Ke, Nong Si it, Najiaojing, Shoulotong, Weiba. Click to get more sweet potato planting techniques click to get more vegetable planting techniques