Chemical Properties (Leaving Cert Agricultural Science): Flashcards

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Ionic forms of N in soil

NO3−NO_3^- (nitrate) or NH4+NH_4^+ (ammonium)

Main role of P in plants

Critical for root development and energy transfer

Ionic form of K in soil

K+K^+ (potassium ions)

Role of Mg in plants

Essential component of chlorophyll molecules

Optimal soil pH range for crops

Between 6 and 7 (slightly acidic to neutral)

Chemical formula of agricultural lime

CaCO3CaCO_3 (calcium carbonate)

What is CEC?

Soil's ability to hold and exchange positively charged ions

Main storage sites for CEC

Clay particles and organic matter (humus)

What is flocculation?

Clay particles clumping together to form stable soil crumbs

Ion most effective for flocculation

Ca2+Ca^{2+} (calcium ions)

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