A ph may pertain-to a (surface soil).Logical formLearned from4 sentences. (Soil ph) may affect an availability of nutrients.Logical formLearned from4 sentences. A combination can be constituted-of-or-filled-with ph.Logical formLearned from4 sentences. A reduction can be in ph.Logical formLearned from4 sentences. Phs may undergo a regulation.Logical formLearned from4 sentences. A dependence can be on ph.Logical formLearned from4 sentences. A (ph water) can be high.Logical formLearned from4 sentences. Changes can be in intracellular ph.Logical formLearned from4 sentences. Phs may pertain-to a medium.Logical formLearned from4 sentences. Effects can be on ph.Logical formLearned from4 sentences. (Ph values) can be alkaline.Logical formLearned from4 sentences. Phs may undergo changes.Logical formLearned from4 sentences. Plants may require a ph.Logical formLearned from3 sentences. A ph can be in water.Logical formLearned from3 sentences. A ph may pertain-to waters.Logical formLearned from3 sentences.