What is the ideal soil pH range for rubber cultivation?

• 5.5 – 6.5
• 4.0 – 5.0
• 7.0 – 8.0

Which of the following soil types is most suitable for rubber plantations?

• Well-drained sandy loam
• Clayey soil
• Saline soil
• Peat soil

What is the minimum annual rainfall required for optimal rubber tree growth?

• 2000 mm
• 1000 mm
• 1500 mm
• 2500 mm

How does high rainfall affect soil pH?

• Leads to more acidic soil
• Increases alkalinity
• Causes neutralization
• Has no effect

What is the main benefit of using legume cover crops in plantations?

• Fix nitrogen and improve soil fertility
• Increase fruit size
• Reduce plant height
• Prevent pest infestation

Does soil organic matter decrease with increasing rainfall?

Does mulching help regulate soil temperature?

Can rubber trees grow in desert climates?

Are sandy soils the best choice for rubber plantations?

Can excessive rainfall lead to soil nutrient loss through leaching?