Principles of Soil Analysis Lecture

This contains the starred points from lecture, along with information I think it would be useful to know. Starred points are marked with an asterisk.

Soil provides __ of 17 essential nutrients.

14

What are the macronutrients that soil provides?

N, P, K, Ca, Mg, and S. (Na and Cl can be both macro and micro)

What are the micronutrients that soil provides?

Fe, Cu, Mn, B, An, Mo, Na, and Cl. (Also Si, Se, Co, Va, and Ni)

What elements are supplied by air?

C, H, and O.

A spoonful of soil contains more micro-organisms than ________.

The number of people on Earth.

*1 cm³ may have more than 1,000,000 bacteria, upwards of ____ species.

7000

*Soil is a _____ natural body composed of ____ and ____ ______, and _____ or dead forms which support plant growth.

dynamic, mineral and organic materials, living.

*Soil is at least __cm thick

10 cm

How large is a pedon?

1 m³

What is Liebig’s Law of the Minimum?

The crop yield will be determined by the element present in the most limiting quantity in the soil.