Seed crop field must be isolated (separated) from any other variety of the same crop to avoid cross contamination. Different crops have different isolation distance depending on their mode of pollination
Minda ya mbewu ipatulidwe, isayandikane ndi minda ina ya mbewu yomweyo popewa kuyipitsidwa. Mbewu zosiyanasiyana zili ndi mulingo wakutalika kwake kodzipatula potengera njira zomwe zimakwatitsana