Imagine a mirror, you are standing in front of it, and flashing your torch light straight into it, IT will come back directly without any refraction, now see how much angle your torch light made to the mirror surface, it's 90 degree right.

Identifying Soils with Potash but not Phosphorous
To determine which soil contains potash but not phosphorous, specific testing methods need to be employed. Here are some key points to consider:

Soil Testing
- Soil testing is essential to determine the nutrient content of the soil.
- Laboratories can perform soil tests to analyze the levels of various nutrients, including potash and phosphorous.

Potash Testing
- Potash, also known as potassium, is a crucial nutrient for plant growth and development.
- Soil tests specifically measure the levels of potassium in the soil, indicating the presence of potash.

Phosphorous Testing
- Phosphorous is another essential nutrient for plants, promoting root development and overall growth.
- Soil tests can also determine the phosphorous levels in the soil, indicating its presence.

Differential Testing
- By comparing the results of potash and phosphorous testing, it is possible to identify soils that have high levels of potash but low levels of phosphorous.
- This differential testing approach helps in determining the specific nutrient composition of the soil.

Trick for Identifying Minerals in Soil
- One trick for identifying minerals in the soil is to observe plant growth and health.
- Potash-deficient soils may exhibit symptoms like yellowing leaves or stunted growth, indicating a lack of potassium.
- Phosphorous-deficient soils may show signs such as poor root development or delayed flowering, pointing to a lack of phosphorous.
By utilizing soil testing methods and observing plant health, it is possible to identify soils that contain potash but not phosphorous. This information is crucial for determining the appropriate fertilization and nutrient management strategies for optimal plant growth.