Sikuti feteleza onse okhala ndi phosphorous ali ofanana. Pachifukwa ichi, kuonetsetsa kuti zakudya za phosphorous zokwanira komanso panthawi yake pa mbatata zingakhale zovuta kapena zodula.
Ngati feteleza awiri ali ndi phosphorous yokwanira yofanana, koma imakhala mumitundu yosiyanasiyana yomwe imagwira ntchito mosiyanasiyana m'nthaka, feteleza amatha kusiyanasiyana malinga ndi kuchuluka kwake komanso nthawi yanji yomwe mbewu idzapezeke. Izi zimakhumudwitsa alimi ambiri a mbatata ndipo zimadzetsa kulakwitsa kwa feteleza.
Pofuna kuonetsetsa kuti alimi akupeza zomwe adalipira poikapo zakudya m'zakudya, feteleza wamkulu wa phosphate wamalonda amalembedwa ndi phosphorous (P2O5) yomwe imapezeka ku zomera. Phosphorus yomwe imapezeka ku zomera imawerengedwa poyesa kusungunuka kwa feteleza wa phosphate m'madzi ndi ammonium citrate, asidi ofooka. Amatsanzira ma organic acid omwe amapezeka mwachilengedwe m'nthaka kapena amatulutsidwa ndi mizu ya zomera.