Soils irrigated exclusively by tube well water often face deficiencies of zinc (Zn), iron (Fe), and sometimes manganese (Mn) and phosphorus (P).
Soils irrigated by tube well water only face the deficiency of--------
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Question context
This question is part of 🌍 Current Affairs within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.