Question : Which of the following statements is not correct about "Manures"?

Option 1: They can be prepared in the fields.

Option 2: They do not provide humus to the soil.

Option 3: They are relatively less rich in plant nutrients.

Option 4: They are natural substances.

Question : Which of the following statements is not correct regarding fertilisers?

Option 1: They are prepared in factories.

Option 2: They are very rich in plant nutrients.

Option 3: They provide humus to the soil.

Option 4: They are man-made inorganic salts.

Question : Plants require nutrients for their growth which can be supplied through _______.

Option 1: soil and air only

Option 2: soil, water, and air

Option 3: soil and water only

Option 4: soil only

Question : Directions: Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
Some kings are rich.
Some rich are proud.
Conclusions:
I. Some kings are not proud.
II. Some rich are not proud.

Option 1: Only conclusion II follows

Option 2: Neither conclusion I nor II follows

Option 3: Both conclusions I and II follow

Option 4: Only conclusion I follows

Question : Which of the following soils requires the least tillage due to its self-cultivating characteristic?

Option 1: Red soil

Option 2: Laterite soil

Option 3: Peaty soil

Option 4: Black soil

Question : Which layer of the soil has a maximum concentration of humus?

Option 1: Parent rock

Option 2: Weathered rock material

Option 3: Topsoil

Option 4: Subsoil