Ba duk takin da ke tushen phosphorus ba daidai ba ne. Don haka, samar da isasshen abinci mai gina jiki na phosphorus ga dankali na iya zama da wahala ko kuma maras tsada.
Idan takin zamani guda biyu ya ƙunshi jimlar adadin phosphorus iri ɗaya, amma yana ƙunshe a cikin sinadarai daban-daban waɗanda ke amsawa daban-daban a cikin ƙasa, takin na iya bambanta sosai da nawa zai samu shuka a lokacin girma. Wannan gaskiyar tana kunyata yawancin masu noman dankalin turawa kuma yana haifar da kurakurai akai-akai a cikin hakin amfanin gona.
Don tabbatar da cewa masu noman sun sami abin da suke biya lokacin da suke saka hannun jari a cikin kayan amfanin gona, duk manyan takin phosphorus na kasuwanci ana lakafta su da adadin phosphorus (P2O5) wanda ke samuwa ga shuke-shuke. Phosphorus samuwa ga shuke-shuke ana ƙididdige su ta hanyar auna solubility na takin phosphorus a cikin ruwa da ammonium citrate, acid mai rauni. Yana kwaikwayi kwayoyin acid da ke faruwa ta dabi'a a cikin kasa ko kuma tushen tsiro ya boye.