Answer
A. Sources of nitrogen
-Atmosphere Main reservoir
- Soil Organic Matter – Decomposing plants and animals
- Lightning Fixation.
B. sources of phospherus
- Phosphate Rock – Primary mined source.
-Soil Minerals – Bound as calcium, iron, or aluminum phosphates.
-Decaying Biomass – Released from organic matter as orthophosphate.
Work Step by Step
A. Uses of Nitrogen
; Fertilizers (Ammonia, Urea, Nitrates) – Essential for plant growth.
; industrial Chemicals – used in explosives, refrigerants, and pharmaceuticals
B. uses of Phosphorus
Fertilizers– Vital for root growth, ATP, and DNA in plants.
Detergents & Industrial Uses – Sodium tripolyphosphate is in cleaners; also used in matches, fireworks, and steel production.
