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ABBREVIATIONS AND SYMBOLS


CPR

Crop Production Region

FAO

Food and Agriculture Organization of the United Nations

f.o.b.

Free on board

FYM

Farm yard manure

IFA

International Fertilizer Industry Association

IMPHOS

World Phosphate Institute

Karaz

Underground channel for irrigation

Kharif

Summer crop season: April to September

NFDC

National Fertilizer Development Centre

NFWP

North West Frontier Province

PARC

Pakistan Agricultural Research Council

Rabi

Winter crop season: October to March

SCARP

Salinity Control and Reclamation Project

VCR

Value Cost Ratio

Zn

Zinc



AS:

Ammonium sulphate

CAN:

Calcium ammonium nitrate

DAP:

Diammonium phosphate

MOP:

Muriate of potash (potassium chloride)

NP:

Compound fertilizer containing nitrogen and phosphate

NPK:

Compound fertilizer containing nitrogen, phosphate and potash

SOP:

Sulphate of potash

SSP:

Single superphosphate



N:

Nitrogen

P2O5 or P:

Phosphate*

K2O or K:

Potash*

* Phosphate and potash may be expressed as their elemental forms P and K or as their oxide forms P2O5 and K2O. Nitrogen is expressed as N. In this study phosphate and potash are expressed in their oxide forms.


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