Through comprchensive experimental results of three agronomic culture measures′ ineluding amounts of seed manures (phosphorus), density, amount of nitrogen which were tested on “ZHE BI No.3” Castor growing in our avtonomous region We made a systematic analysis of the single factor effect or reciprocal effect on yield, which caused by the three agronomic culture measures. The results illustrated their influence upon yield. And we furtherly put forward theoretical basis for supervising scientific management of “ZHE BI No.3”castor production.