(Sampling units) may be selected.Logical formLearned from2 sentences. A (sampling scheme) can be simple.Logical formLearned from2 sentences. Sampling may undergo a stratification.Logical formLearned from2 sentences. Some (sampling methods) may be compared.Logical formLearned from2 sentences. (Sampling efforts) can be increased.Logical formLearned from2 sentences. Research may combine (field sampling) of birds.Logical formLearned from2 sentences. (Field sampling) can be constituted-of-or-filled-with birds.Logical formLearned from2 sentences. (Sampling techniques) can be careful.Logical formLearned from2 sentences. A sampling can be appropriate.Logical formLearned from2 sentences. Criteria can be for sampling.Logical formLearned from2 sentences. (Sampling results) can be environmental.Logical formLearned from2 sentences. An issue can be constituted-of-or-filled-with sampling.Logical formLearned from2 sentences. Instructions may be provided for a sampling of sprouts.Logical formLearned from2 sentences. A government-agency may undertake (surveillance sampling).Logical formLearned from2 sentences. (Seafood products) may undergo a sampling.Logical formLearned from2 sentences.