Modifiers matching grassland:

• upland,
• temperate,
• rough,
• open,
• natural,
• arid,
• agricultural,
• wet,

Simple categories matching temperate:

• zone,
• fruit,
• flora,
• grain,
• legume,
• product,
• crop,
• cereal,
• vegetable,
• grass,
• hardwood,
• community,
• organism,
• grassland,
• tree,
• country,
• genus,
• species,
• area,
• plant,
• food,
• oilseed,
• flower,