Learn German: Hier gibt es keine guten Felder. - There are no good fields here.

When an adjective describes a plural noun and comes after a negative article like keine, it must end in -en. This same -en ending is required for plural adjectives following definite articles (like die) and possessive articles (like meine or seine).

Why is the sentence order gibt es instead of es gibt?

German has a strict rule for main clauses: the verb must always be in the second position. Because this sentence starts with the location word Hier in the first position, the verb gibt must take the second position. This pushes the pronoun es right after the verb.

Why do we use keine here to say "no" instead of nicht?

In German, you use a form of kein- to negate a noun, which translates to "not any" or "no". Because Felder is a plural noun, we use the plural form keine. You generally use nicht to negate verbs or standalone adjectives, rather than nouns.

Since es gibt means "there is" or "there are", what case is keine guten Felder in?

It is in the accusative case! A very important rule for the phrase es gibt is that the thing that "exists" acts as the direct object, so it must be accusative. For plural nouns like Felder, the accusative forms of articles and adjectives happen to look exactly the same as the nominative forms, but they are grammatically accusative here.