Soil Science MCQ Question and Answer | Agriculture MCQ Question

The crops are specific for the occurrence of symptoms of a particular deficient nutrient element exhibiting characteristic symptoms. Such crops are called Indicator crops for deficiency of that particular element.
Citrus fruits and cereals like wheat is the indicator of the copper element. A general wilting of the whole plant occurs at early tillering.

Soil physics is the study of soil's physical properties and processes. It is applied to the management and protection of natural and managed ecosystems. Soil physics deals with the dynamics of physical soil components and their phases as solids, liquids and gases.
Daniel Hillel is the father of soil physics.

In agricultural soils, 10% of the total nitrogen is found as fixed ammonium ions. Ammonium and nitrate ions are the predominant inorganic forms of nitrogen in soils. Ammonium is available in the soil atmosphere in both exchangeable as well as non-exchangeable forms.
Nitrogen is a widely available element in our environment, it is available in different forms like ammonium ions, nitrate ions, nitrite ions or elemental forms.

Out of the given options, calcium is the immobile element. Immobile elements are such elements that cannot be moved by plants along with the nutrients within themselves from older tissues to newer tissues.

The solum (plural sola) in soil science consists of surface and subsoil layers that have undergone the same soil forming conditions.
The base of the solum is un-weathered parent material and it is the upper surface can also be called as ‘floor’.

Operation flood programs relate to a white revolution which was launched on 13^th January 1970, for boosting the milk supply in our country. This revolution transformed India from a milk deficient nation into the world's largest milk producer.
It was launched to help farmers direct their development and give them control of the resources they create.

Zeolites are microporous, three-dimensional crystalline solids of aluminium silicate. Zeolites have small openings of fixed size in them which allow small molecules to pass through them easily but larger molecules cannot pass through them, that is why they are also called molecular sieves.
Zeolites come under the group of Tectosilicates, these are framework silicates that have a three-dimensional framework silicate tetrahedral with SiO₂ or a 1 : 2 ratio.

DAP ( Diammonium phosphate) is the most common phosphate fertilizer in India. It is one of a series of water soluble ammonium phosphate salts that can be produced when ammonia is with phosphoric acid.
DAP is used as a fertilizer, it contains 18% nitrogen and 46% of available phosphorus.

Molybdenum is one of the essential plant nutrients required for the growth and development of the plant in trace amounts. It is the element required by several enzymes important to animal and plant metabolism.
Molybdenum is a component of enzymes are aldehyde oxidase, sulphite oxidase, formate dehydrogenase, nitrate reductase and nitrogenase.

The capacity of the soil to be molded wet, i.e. to change shape in response to stress and to maintain that shape when the stress is removed is termed Plasticity.
The plasticity of soil is its ability to undergo deformation without cracking. It is an important index property of fine-grained soil, especially for clayey soils.