Isi y'amabara ibuze ubwiza bwimyambarire, imyenda itangaje, kugirango isi yongereho uburyo bwinshi. Ubwiza bwimyambarire ahanini buba muburyo bwiza bwo gukusanya amabara. Irangi ry'imyenda rirashobora gutanga cyangwa imyenda ya selile ya fibre imyenda y'ibara ryiza kandi igenda, kwemeza ko irangi ryimyenda nyuma yimyenda yinka, ikoti, imyenda ya siporo n imyenda isanzwe bishobora gutanga ingaruka zidasanzwe, nibicuruzwa byo kurengera ibidukikije, kubishyira mu bikorwa, birashobora gukora imyambarire ifite urutoki rworoshye, ufite uruhu rwamashaza wiyumvamo iyerekwa hamwe ningaruka zo gukaraba, Cyane cyane kumurongo wikurikiranya ku ngaruka biragaragara cyane, inyungu zinyuranye zavuzwe haruguru zirashobora kuzamura rwose icyifuzo cyumuguzi cyo kugura no kuzamura ipiganwa isoko.