This study aimed to explore companion planting to improve vegetable productivity on extensive green roofs through urban agriculture with limited substrate depth. From May to July 2021, the study conducted on the rooftop to evaluate the effects of marigold (Tagetes patula) planting ratio on the growth and pest control of cabbage (Brassica campestris). The experiment plot measured 1 m in width × 1 m in length × 0.25 m in height and 0.2 m in substrate depth. Fifteen plots were planted in varying proportions of cabbage and marigold for three repetitions per treatment: cabbage control (CC), 2:1(C2M1), 1:1(C1M1), 1:2(C1M2), and marigold control (MC). We found that companion planting marigolds with cabbage significantly increased cabbage growth and reduced pest infestation. The study revealed that C1M1, when cabbage and marigold have the same proportion, is an efficient companion planting ratio. Companion planting, in which non-crop vegetation manages pests and increases crop productivity, improves natural pest control and preserves biodiversity on rooftop urban agriculture.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 재료
    2.2. 방법
    2.3. 통계분석
3. 결과 및 고찰
    3.1. 배추
    3.2. 메리골드
4. 결 론
감사의 글
REFERENCES

• 민경민(건국대학교 대학원 녹색기술융합학과) | Kyung-Min Min (Department of Green Technology Convergence, Graduate School of Konkuk University, Chungju 27478, Korea)
• 박선영(건국대학교 대학원 녹색기술융합학과) | Sun-Young Park (Department of Green Technology Convergence, Graduate School of Konkuk University, Chungju 27478, Korea)
• 윤용한(건국대학교 녹색기술융합학과) | Yong-Han Yoon (Department of Green Technology Convergence, College of Science & Technology, Konkuk University, Chungju 27478, Korea)
• 주진희(건국대학교 녹색기술융합학과) | Jin-Hee Ju (Department of Green Technology Convergence, College of Science & Technology, Konkuk University, Chungju 27478, Korea) Corresponding author