Leaching is the maximum in the soil type of Laterite.

Leaching is a natural process by which water carries away dissolved substances from the soil, such as nutrients and minerals. It occurs when there is excess water in the soil that moves downwards through the soil profile, carrying the dissolved substances with it. The intensity of leaching depends on various factors, including the soil type.

Laterite soil:
Laterite soil is a type of soil that is found in tropical and subtropical regions. It is characterized by its high iron oxide content and its red color. Laterite soils are formed by the weathering of rocks and minerals in hot and wet climatic conditions. These soils are highly leached due to the heavy rainfall in these regions.

Factors contributing to leaching in laterite soil:
1. Heavy rainfall: Regions with laterite soil experience heavy rainfall, which leads to excess water in the soil. This excess water percolates through the soil, carrying away dissolved substances with it.

2. High temperature: Laterite soil is found in tropical and subtropical regions where the temperature is high. High temperatures accelerate the weathering process, leading to the formation of more soluble compounds that are susceptible to leaching.

3. Porous nature: Laterite soil is porous and has a low water-holding capacity. This means that water easily infiltrates the soil and moves downwards, carrying away dissolved substances.

4. Lack of organic matter: Laterite soil is generally low in organic matter content. Organic matter helps in retaining nutrients and minerals in the soil, reducing the chances of leaching. The absence of organic matter in laterite soil increases the vulnerability to leaching.

5. Low cation exchange capacity: Laterite soil has a low cation exchange capacity, which means it is not able to retain positively charged nutrients. This further increases the leaching potential of the soil.

Conclusion:
Considering all these factors, it can be concluded that leaching is the maximum in the soil type of Laterite. The combination of heavy rainfall, high temperature, porous nature, lack of organic matter, and low cation exchange capacity make laterite soil highly susceptible to leaching.