Effects of Partial Leaf Area Reduction on Yield and Quality of Camellia oleifera EFFECT OF SULFUR FERTILIZER ON COTTON(GOSSYPIUM HIRSUTUM L.) FRUIT ABSCISSION RATE AND YIELD The Influence of Liquid Endosperm on Fruit Abscission and Growth of Litchichinensis Sonn. Response of pear jujube trees on fruit development period to different soil water potential levels EFFECTS OF SMEARING NAA ON GROWTH AND FRUIT ABSCISSION OF COTTON(Gossypium barbadense L.) PLANTS AFTER DECAPITATION