Ph may undergo a variation.Logical formLearned from3 sentences. (Soil ph) may be monitored.Logical formLearned from3 sentences. A ph may pertain-to a subsoil.Logical formLearned from3 sentences. A ph can be neutral.Logical formLearned from3 sentences. Areas can be with ph.Logical formLearned from3 sentences. A drop can be in (soil ph).Logical formLearned from3 sentences. A ph may pertain-to a refuse.Logical formLearned from3 sentences. A ph may pertain-to a solution.Logical formLearned from3 sentences. Soil can be with ph.Logical formLearned from3 sentences. A ph can be correct.Logical formLearned from3 sentences. (Soil ph) may undergo lowerings.Logical formLearned from3 sentences. Extremes can be constituted-of-or-filled-with phs.Logical formLearned from3 sentences. Water can be at ph.Logical formLearned from3 sentences. A ph can be basic.Logical formLearned from3 sentences. A range can be constituted-of-or-filled-with (soil ph conditions).Logical formLearned from3 sentences.