Kugwiritsa ntchito njira zosakhala zachikhalidwe polimila mbewu zosiyanasiyana nthawi zambiri kumalumikizana ndi chidwi chofuna kupeza phindu pogwiritsa ntchito zinthu zomwe zilipo kale mowonjezera. Mukakulitsa nkhaka m'miphika, wamaluwa amapulumutsa malo amtengo wawo. Koma sikuti mwayi wokhawo wa njirayi, ili ndi zabwino zina zambiri, zomwe muyenera kudziwa mwatsatanetsatane.
Gulu Oak
Kale, mtengo wamtengo unali mtengo umene pafupifupi chirichonse chinapangidwira: nyumba ndi zikepe, zida ndi zipangizo, ngakhalenso mankhwala. Mankhwala omwe amafunidwa kwambiri ndi makungwa a mthunzi. Za iye lero ndi kuyankhula. Mankhwala a makungwawa ali ndi tannin ambiri, ali ndi 20%, ndipo palinso mapuloteni, gallic ndi ellagic acids, flobaphen ndi flavonoids, levulin ndi pectin.