questions: asking about the method of air layering in litchi. 
 answers: advised to take 1-1.5 yr old branch of litchi abour pencil thickness.remove the bark up to cambium layer,about 3 inch long.take soil mix with cowdung and saw dust and stick around the barkless area.wrap the portion with plythene and tie both the end.after 1-1.5 month the rooting will take place.cut the branch and plant in poly bag for 2 months then plant in mail field.