Soil Module 3 Quiz | OceanRemote Education

1 What does CEC measure?

A) Soil pH B) Soil's ability to hold nutrients C) Water content D) Salt level

2 What is good organic matter percentage?

A) 0-1% B) 5-10% C) 2-5% D) 10-15%

3 What does high EC indicate?

A) High salt/salinity B) High pH C) Low nutrients D) Good drainage

4 What is variable rate application?

A) Same fertilizer everywhere B) Different rates based on soil needs C) Only one zone D) Manual application

5 How much can VRA reduce fertilizer costs?

A) 5-10% B) 10-20% C) 30-50% D) 70-80%

6 What is the best yield indicator?

A) Single nutrient B) Only pH C) Water only D) Multiple factors including pH and NPK

7 What does R² value measure?

A) Correlation strength B) Soil pH C) Nutrient level D) Water content