User

Soil intermediate

Difficulty/Levels

Level 2

Data Type

• 1 Photo
• 1-3 Rating

What is the meaning and importance?

The soil profile is an important tool in nutrient management.

By examining a soil profile, we can gain valuable insight into soil fertility.

As the soil weathers and/or organic matter decomposes, the profile of the soil changes.

What is the method for collection?

1. Dig a ~202020 cm hole with a spade / small shovel. This hole will also be used for the next steps.
2. Create a flat surface, on a well lit side of the soil pit (ideally, facing the sun)
3. Take a picture of the soil profile - please, don't forget to include a clearly visible scale in your picture (something of known length, this could be a ruler, bottle cap, pen, or coin) - see picture below
4. Be sure to record the length or diameter of scale you use
5. Using comparison photos, rate the topsoil to subsoil transition. Examine one of the well-exposed sides of the pit carefully to determine the different soil horizons:
   • Check depth and abundance of soil life and root matter
   • Topsoil contains organic matter, soil life and feeding roots
   • The deeper the topsoil layer, the better
   • Gradual paling of soil towards subsoil
   • Subsoil is wholly mineral, with occasional deep taproots

How long does it take to collect?

5-10 minutes

Evaluation Parameters

(If applicable: 1=good; 2=fair; 3=poor)

1: Good layer of topsoil (> 10 cm); dark colour; the deeper, the better. Abundant, varied soil life and root matter. Visible pores for water, air and other gases; soil is soft and non compacted, roots extend vertically along A horizon.