Zawia3 · Chart 5 of 10

Wheat Yield per Feddan: With vs. Without Adequate Fertilizer

Ardabs per feddan — fertilizer shortfall cuts yield by up to 35%

"With adequate fertilizer a feddan yields 20 ardabs; without it, just 12 to 13 — a third of the harvest lost"

With adequate fertilizer

20

ardabs / feddan

Without adequate fertilizer

12–13

ardabs / feddan

Yield loss

−35%

of harvest

Source: Dr. Gamal Siam — agricultural economist