The crops were all destroyed and long gone. The south had battles on many fields that once grew various types of crops. Men went missing who once tended the fields for the crops to go. Many of them ended up injured or even worse, death. Plantations were left abanded and destroyed. Transportation was gone. Railroad lines had been pulled out or torn apart to prevent the south from moving supplies. Even walking to find a way out was very dangerous for anybody.
Plant populations change over time by growing in size and diversity. They generally are the first part of an ecosystem after lichens (the pioneer species) and cause an ecosystem to flourish and allow for animals to move in. I don't know if this is the answer you were looking for but it should give you somewhat of a base.
The Toleranz patent was attempt at compromise and tolerance for various minority faiths of religions in Germany. The Jews benefited from this decree as they were given the right to conduct various forms of businesses, and they were also allowed to attend public schools.
In 1506 appeared his epoch-making De Rudimentis Hebraicis<span>—grammar and lexicon—mainly after Kimhi, yet not a mere copy of one man's teaching.
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