翻译：从每棵苹果树不同方位随机选取50个果逐果称重计算苹果单果质量g；计算折合成667m2面积的产量kg；用果实横径测量器测量各果的果实横径mm统计不同横径大小苹果比例比较各处理果树优质果率差异。

Translation: Randomly select 50 fruits from each apple tree in different directions, weigh each fruit, and calculate the mass of each apple fruit (g); calculate the yield (kg) equivalent to an area of 667m2; measure the fruit diameter (mm) of each fruit using a fruit caliber, and calculate the proportion of apples of different diameter sizes, compare the differences in the yield of high-quality fruits (%) among different treatment apple trees.