Chemical properties of the different parts of watercress(Oenanthe javanica D.C.) grown and harvested from the culture fields under different cultivating methods were studied. In proximate analyses of watercress in parts, moisture contained more in stem than in root or in leaf, but crude protein and crude lipid contents were lower in stem than in root or in leaf. Crude ash in root contained up to about double amount in leaf or stem. Major mineral elements detected in watercress were Fe, Mg, Ca, and K, and their contents in root was higher than those in stem or leaf. Especially, Fe in root was significantly higher than that in stem or in leaf. Total free sugar composed mainly with fructose and glucose, was the highest in watercress from Hwasoon and followed the watercress from Jeonju and Donggok in order. Free sugar content was highest in leaf and the lowest in root. Major water-soluble vitamins were vitamin C, thiamin and biotin and the content of vitamin C was higher than others. These vitamins contained more in leaf than in stem or root. Niacin contained 6.09 mg/100 g in leaf of watercress from Hwasoon, which was much higher than others, but it was not detected in stem of watercress from Jeonju. Organic acids detected were oxalic acid, citric acid and malic acid and other 12 organic acids were not detected. In fatty acid composition, there were significant differences among watercresses from different parts and different culture fields. Linoleic acid, linolenic acid and palmitic acid were major fatty acids contained in watercress and it took about 80% of the total content. Amino acid content in leaf was higher than that in root and in stem. Glutamic acid and proline were major amino acids in stem of watercress from Jeonju and in stem of watercresses from Hwasoon and Donggok, respectively. In leaves of all three watercresses glutamic acid content was the highest.

백출의 재배체계확립시험의 일환으로 노지육묘시 점파(5×5 cm, 5×10 cm, 10×10 cm, 10×15 cm)와 조파(15 cm)등의 파종방법과 종근중의 무게에 의한 생육과 수량에 미치는 영향을 구명하기 위하여 시험 수행한 결과를 요약하면 다음과 같다. 파종방법별 출아기와 초장은 비슷하였으나 엽수와 지상부 생체중은 육묘 재식거리가 넓을수록 증가 하였으며, 지하부의 근경장과 근경직경도 재식거리가 넓을수록 컸으며 주당 생근중도 5×5cm의 10.4g에 비해 2.9∼8.7g이 더 무거웠으나 10g 당 생근중은 5×5 cm에서 1,012kg으로 가장 높았다. 10a 당 종근의 생산량은 재식밀도가 좁은 5×5 cm와 조파(15cm)에서 많았으나 16g 이상 종근의 생산량은 10×10 cm에서 가장 높았으며 5×5 cm에 비해 35% 증가 되었다. 종근중이 무거울수록 출아기는 1∼3일 빨라졌으나 출아율은 비슷하였고, 경장, 경수, 화뢰수 및 생체중에서는 종근이 무거울수록 증가하는 것으로 나타났고 병해는 비슷하였다. 지하부의 생육에서는 근경장, 근경직경이 종근중이 무거울수록 증가하였으며 10 a 당 건근경 수량도 5 g이하 134.6kg에 비해서 6g 이상에서 27∼112% 정도로 증수되었다.