Semi-forcing with floating mulch increases yield of Chinese cabbage (Brassica pekinensis [Lour] Rupr. cv, Nagaoka 50)

Chinese cabbage plants (Brassica pekinensis [Lour] Rupr. cv. Nagaoka 50) we re cultivated in Granada (Southern Spain) under floating mulch, consisting of polyethylene (T-1); or polypropylene (T-2); their yields (total and comm ercial) were compared with the yields of not covered control plants (T-0). The latter gave the lowest commercial yield. Semi-forcing with floating mul ch improved the yield of T-2 and still more that of T-1 Semi-forcing with f loating mulch is an efficient way of improving Chinese cabbage yields in So uthern Spain.