questions: farmer asking query regarding air layering in lemon. 
 answers: the first step in air layering is to remove completely a strip of bark 3 cm in width at a point 15cm or more below the tip end. scraping the exposed surfaces to ensure complete removal of the phloem and cambium is desirable to retard healing. about one to two handful of only slightly moistened sphagnum moss or mud pudding with a mixture of well decomposed cowdung, soil and sand with a ratio of 1:1:1, respectively is placed around the stem to cover the cut surface. then a piece of polyethylene sheet 15 to 20 cm wide is wrapped carefully around the branch so that the sphagnum moss or mud is completely covered. both the ends of the polyethylene sheet should be tied firmly so that the moss or mud does not dry up.