Study on Spacing of Earthen Cylinder as Subirrigation for Baby corn Planting in Sandy Soil   Seri Chaturongkakul Amorn Intrawech Somnuk Sritongchim and Yuwadee Buttramara   ABSTRACT         Study on spacing of earthen cylinder as subirrigation for baby corn planting in Sandy soil was conducted at in Roi-et land development station in Nampong series between Mar and Apr. 1990 by using RCB design 5 treatments and 4 replications T1 = conventional watering T2 = bury earthen cylinder spacing 4 feet T3 = bury earthen cylinder spacing 3 feet T4 = bury earthen cylinder spacing 2 feet T5 = bury earthen cylinder spacing 1 foot Using earthen cylinder contain 5 litters of water height 38 cm, diameter 13 cm       The result revealed that buried earthen cylinder spacing 2 feet plant gave the best yield. Therefore, it yielded up to 1 ; 120.30 kg/rai (corn with husk) or 195.23 kg/rai (grain yield) while conventional watering gave 736.03 and 135.30 kg/rai respectively. In case of pod length, there was no significant difference between treatments as far as statistical was concerned. The moisture content in soil showed no different during first period of planting but there was significant different during last period of planting. The average spacing 1, 2 and 3 feet was 13.19 %         Keywords : Earthen Cylinder, Baby corn