Soil Science - Page 45 of 50

A. In the absence of an element, its not possible for plant to complete its vegetative cycle.
B. The role played by an element is specific & can not be replaced by another element.
C. The element is directly involved in the nutrition of the plant.
D. All of these

Essentiality criteria of an element :

Nutritive elements needed in large quantities to ensure normal plant development:

Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:

Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

The forest soils have lower bulk density than agricultural soils because of their …… content.

In which form plant uptake phosphorus?

In acidic soil which form of phosphorus uptake by plants?

In alkaline soil which form of phosphorus uptake by plants?

What civil engineers called soil?

Extrusive rocks are also called as ……….. in which the grain or crystalline structure is too fine to be seen by the unaided eye?

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