Ilitye lokusila ihammer drop feed ngumatshini ojolise ekutyumzeni imathiriyeli ngokungqubana phakathi kwehamile enesantya esiphezulu kunye nemathiriyeli. Ilungele ukungqusha imathiriyeli ekrwada efana namakhoba, umbona, ingqolowa, iimbotyi, indongomane, njl. njl. Uyilo olukhethekileyo lokuwisa amanzi lwesando sokusila lunokuqinisekisa indawo enkulu yokusila kwaye luphucule ukusebenza kakuhle ngama-40%. Kuyimfuneko kwimizi-mveliso emikhulu kunye nephakathi kunye nemizi-mveliso.