JADAM Organic Farming (Korean Edition 한국어), 강력한 천연농약 자가제조 솔루션, 초저비용 유기농업

This is the most comprehensive, intelligent gardening book you can buy. Just make sure you request English edition unless you can read Korean.

Amazing book! Thankyou Youngsang Cho for sharing your wisdom. Must have, in organic growing libarary.