In this article we will discuss about:- 1. Composition of Soil Air 2. Factors Affecting the Composition of Soil Air 3. Gaseous Exchange between Soil and Atmosphere 4. Soil Aeration. The volume of the soil that is not occupied by soil particles is known as 'Pore Space'. The pore space is usually occupied by air and water. The air filled [...]
After reading this article you will learn about the principles and Ficks’s law for measuring Oxygen Diffusion Rate (ODR). Principles of Measuring Oxygen Diffusion Rate (ODR): When a certain electric potential is applied between a platinum electrode inserted into the soil and a reference electrode, oxygen (O2) is reduced at the platinum electrode surface. The general reaction taking place at [...]
This article throws light upon the two main reasons responsible for poor aeration in soil. The reasons are: 1. Excess Moisture 2. Gaseous Interchange. Poor Aeration in Soil: Reason # 1. Excess Moisture: When a soil is subjected to excess moisture, waterlogged condition is developed. This situation is generally found on poorly drained, fine-textured soils having a minimum of macro-pores [...]