A topsoil can be fertile.Logical formLearned from48 sentences. A countryside can be fertile.Logical formLearned from47 sentences. A silt can be fertile.Logical formLearned from46 sentences. An island can be fertile.Logical formLearned from46 sentences. A black soil can be fertile.Logical formLearned from46 sentences. (Breeding grounds) can be fertile.Logical formLearned from46 sentences. Soil can be fertile.Logical formLearned from45 sentences. A coastal plain can be fertile.Logical formLearned from45 sentences. Grounds can be fertile.Logical formLearned from45 sentences. Land can be fertile.Logical formLearned from44 sentences. A (river valley) can be fertile.Logical formLearned from44 sentences. Countries can be fertile.Logical formLearned from43 sentences. (Recruiting grounds) can be fertile.Logical formLearned from43 sentences. Lands can be fertile.Logical formLearned from43 sentences. A loam can be fertile.Logical formLearned from41 sentences.