Nongyan zhushi 農言著實, also called Banban Shanzhuang Nongyan zhushi 半半山莊農言著實, is a book on agriculture written by Yang Xiuyuan 楊秀元 (early 19th cent.) during the first half of the 19th century. Yang Xiuyuan, original name Hengxiao 恒孝, courtesy name Yichen 一臣, hailed from Sanyuan 三原, Shaanxi, and decided to become a farmer with the age of 40 sui. He would "half study, half cultivate", and thus called himself Banban Shanzhuang Zhuren 半半山莊主人.
Yang's text is written as an instruction to family members about important aspects of farming and is arranged according to the twelve lunar months, describing the concrete duties to be observed during each particular time. This "instruction to my sons" is called Banban Shanzhuang Zhuren shi er bei 半半山莊主人示兒輩. The second part of the book consists of various notes (Zaji shi tiao 雜記十條) on animal husbandry, manure, the use of land between fields for the cultivation of vegetables or hemp, etc. The book, written in the local tongue of Sanyuan of western Shaanxi, might thus belong to the genre of "family instructions" (jiaxun 家訓).
The book was first printed in 1856 by the author's son Yang Shiguo 楊士果. Is it included in the series Qinglitang congshu 清麓堂叢書 and was published in a modern edition in 1957 by the Zhonghua Shuju 中華書局 with the title Qin-Jin nongyan 秦晉農言.