sumber :
https://pupuklahan.blogspot.com/2018/10/6-step-membuat-pupuk-organik-cair-poc-air-kelapa-dan-cara-aplikasinya-yang-benar.html
https://pupuklahan.blogspot.com/2018/03/membuat-pupuk-organik-cair-dari-sampah-basah-dengan-em4-dan-air-cucian-beras.html
https://pupuklahan.blogspot.com/2018/03/cara-membuat-pupuk-kompos-siap-digunakan-dalam-7-hari.html
https://pupuklahan.blogspot.com/2018/08/cara-membuat-pupuk-organik-cair-poc-dari-sabut-kelapa-sumber-unsur-hara-kalium-k-alami.html
https://pupuklahan.blogspot.com/2018/08/pupuk-npk-phonska-plus-panen-meningkat-karena-peran-5-unsur-ini.html
