What is DAP fertilizer?
Learn how diammonium phosphate is made, what 18-46-0 means and why it is widely used in crop nutrition.
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— INDEPENDENT FERTILIZER KNOWLEDGE
Understand DAP.
Grow with clarity.
A practical, evidence-led guide to diammonium phosphate—its composition, agronomic role, application principles and place in modern crop nutrition.
✓ Clear explanations✓ Practical context✓ Global perspective
GLOBAL COMMODITY · CROP NUTRITION18–46–0From phosphate rock to fields worldwide
THE ESSENTIAL GUIDE
One fertilizer.
A world of questions.
DAP supplies both nitrogen and phosphorus in a concentrated, granular form. Using it well requires context: crop demand, soil chemistry, placement, timing and local recommendations all matter.
This site turns technical information into useful knowledge—without replacing qualified agronomic advice.
Application principles
Understand how soil conditions, crop demand, placement and timing influence fertilizer decisions.
Read topic →DAP vs MAP
Compare two common phosphate sources and the practical factors that shape product selection.
Read topic →Storage & handling
Keep granular fertilizer dry, free-flowing and protected through transport and storage.
Read topic →(NH₄)₂HPO₄CHEMICAL FORMULA
18%TYPICAL NITROGEN
46%TYPICAL PHOSPHATE (P₂O₅)
GranularCOMMON FORM
LEARNING LIBRARY
Start with the fundamentals
Carefully structured articles for growers, students, buyers and anyone who wants to understand DAP fertilizer.
THE GLOBAL VALUE CHAIN
From mineral resources
to the world’s harvests.
DAP connects mining, chemical production, inland logistics, deep-water terminals, commodity trade and crop nutrition in one international system.
01 · PRODUCTION
Industrial scale and precision
Explore the conversion of phosphate resources and ammonia into a concentrated granular crop nutrient.
02 · GLOBAL LOGISTICSAcross oceans and continents
Understand how ports, bulk vessels, rail, storage and quality control connect supply with demand.
03 · FOOD SYSTEMSPhosphorus for productive agriculture
See why responsible plant nutrition matters to yields, resilience and global food systems.
NORTH AMERICA
A major phosphate industry.
Research established producers, integrated mine-to-market operations and official technical resources.
Explore North America →FOR INDUSTRY LEADERS
Are you a major DAP producer, supplier or logistics operator?
Help us keep the world’s independent DAP reference accurate. Submit verified company information, production locations, technical documents and official contact channels for editorial review.
Contact the editorial team →Inclusion is reviewed independently. Contact does not guarantee publication or endorsement.OUR PURPOSE
Better decisions begin with better information.
DAPFertilizer.com is an independent educational resource. We explain established concepts in accessible language and encourage readers to combine general knowledge with soil analysis, crop requirements, product labels and qualified local advice.