Rape and sesame piants were cultivated with P32 containing culture solution and the distr 量 bution of P32 i・ th ・ v ・・i 。 ・ ・ p ・ ・... fp1・・t・ were i・v , ・・ ig。 t。d at each stage of the plant growth . In the rape experiments , the radioactive solution was supplied tQ the crops during the period from Jan.1 ( 112 th day after sowing 冫 to Jan , 7. After the treatment , the crops were cultivated by the standard culture solution con 亡 aining nonradioactive phosphor _ us . On each of the following days , 8 / Jan. , 5! Feb . ,