Post nuclear pesticide and fertilizer

[aisedhoria129]

Could any premodern or simple types of fertilizer and pestipesticide have had any effect on reviving the British deserts? in premodern times Fish, blood, excrement was used as fertiizer arsenic from as pesticide. Modern times did establish that sulfur was good for the soil. If the Post British reversed engineered some of these chemicals from whatever could be found in the ruins of the cities would it make any dent on the ruined soil