The plant ash indicates:

Soil formed by the transportation of disintegrated parent material from one place to another is called:

The possible resource of phosphorus ions and nitrogen ions in soil generally get depleted because they are usually found as

The branch of science that deals with the study of soil is called .....

Crop plants need various fertilizers for their growth. Their yield is limited by that fertilizer which is present in relatively minimum. The principle contained in this statement was enunciated by

Soil salinity is measured by