Planting & SoilQuestion 28 of 100
To lower the pH of an alkaline soil, which amendment is commonly used?
a.Agricultural lime
b.Wood ash
c.Gypsum for pH change
d.Elemental sulfur
Explanation
Elemental sulfur is oxidized by soil bacteria into sulfuric acid, gradually lowering soil pH over weeks to months. Lime and wood ash raise pH, and gypsum changes soil structure and adds calcium without significantly changing pH. Sulfur is the standard choice to acidify alkaline soils.
Practice all 100 questions free — no signup required.
Related questions on this topic
- A soil that drains very quickly, warms fast, and holds little water is MOST likely which texture?
- Most landscape and turf plants grow best in soil with a pH in which range?
- In a fertilizer labeled 16-6-8, the three numbers represent the percentage of which nutrients in order?
- A 50-pound bag of 20-0-10 fertilizer contains how many pounds of actual nitrogen?
- Applying a 3-inch layer of organic mulch around plants primarily provides what benefits?
- When planting a container-grown shrub, the top of the root ball should be placed at what level relative to the surrounding soil?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-27 Landscaping Trade Exam · How we review