Nagarjuna Double OX is a high-purity water-soluble fertilizer formulated to deliver fast-acting calcium (Ca) and nitrate nitrogen (N) directly to plants. It is designed to correct calcium deficiencies and support strong cell wall development, which is essential for fruit firmness, shelf life, and overall crop quality.

Calcium plays a critical role in strengthening plant tissues and reducing physiological disorders such as blossom end rot, fruit cracking, and poor storage quality. The nitrate form of nitrogen ensures quick absorption and supports vigorous vegetative growth without soil acidity build-up.

This product is suitable for fertigation and foliar application across a wide range of horticultural and field crops.

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Technical Details

Product Type:
Water Soluble Fertilizer

Technical Composition:
Nitrogen (N) – 15.5%
Calcium (Ca) – 18.8%

Formulation:
Fully water-soluble crystalline fertilizer

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Mode of Action

• Supplies readily available nitrate nitrogen for rapid plant uptake
• Provides calcium for cell wall formation and structural integrity
• Enhances nutrient mobility within plant tissues
• Improves cell division, fruit firmness, and stress tolerance

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Mode of Entry

• Root uptake via fertigation
• Foliar absorption through leaf surface

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Key Benefits

• Strengthens cell walls and improves plant structure
• Enhances fruit firmness, size, and shelf life
• Reduces calcium deficiency disorders (blossom end rot, cracking)
• Promotes healthy vegetative growth
• Improves nutrient uptake efficiency
• Suitable for all high-value horticultural crops
• Fully water soluble and easy to apply through drip or spray

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Recommendations (Crops | Issue | Dosage)

Apple | Bitter pit, poor fruit firmness | As per crop stage via fertigation/foliar spray
Tomato | Blossom end rot, fruit cracking | As per deficiency level
Grapes | Berry cracking, poor berry quality | As per growth stage
Potato | Calcium deficiency, poor tuber quality | As per requirement
Vegetables | General calcium deficiency | As per crop need

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PHI & REI (Safety Intervals)

PHI (Pre-Harvest Interval): Not applicable (fertilizer)
REI (Re-Entry Interval): 4–6 hours after application or once foliage is dry

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Application Method

Apply through fertigation or foliar spray. Ensure complete dissolution in clean water before application. Recommended during active growth and fruit development stages for best results.