Abstract: | The test shows that the rare-earth salt,white sugar,potassium chloride and potassium dihydrogen phosphate are conspicuous or the most conspicuous to raise anti-cold ability of Vanilla and that the effects of treatments with 400-fold solution of rare—earth salt,333.3-fold solution of white sugar,250-fold solution of potassium chloride and 1000-flod solution of potassium dihydrogen phosphate are the best. |