Given below are two statements: Statement I: Composting is aerobic degradation…
2023
Given below are two statements:
Statement I: Composting is aerobic degradation of organic materials under controlled conditions, yielding a marketable manure.
Statement II: In such composts, concentrations of key nutrients such as nitrogen, phosphorous and potassium are sufficient enough to compete with commercial fertilizers.
In light of the above statements, choose the most appropriate answer from the options given below.
Answer: C. Statement I is true but Statement II is false — CONCEPTComposting is the managed, oxygen-dependent biological decomposition of organic matter into a stable soil amendment. A material may improve soil…
- A.
Both Statement I and Statement II are true
- B.
Both Statement I and Statement II are false
- C.
Statement I is true but Statement II is false
- D.
Statement I is false but Statement II is true
Show answer & explanation
Correct answer: C
CONCEPT
Composting is the managed, oxygen-dependent biological decomposition of organic matter into a stable soil amendment. A material may improve soil structure and nutrient cycling without having the concentrated, immediately available N-P-K content of a commercial fertilizer.
APPLICATION
Statement I describes controlled aerobic decomposition that produces usable compost; this matches the standard definition of composting.
Statement II makes a stronger quantitative claim. Compost supplies nitrogen, phosphorus and potassium, but their concentrations and plant availability vary, and compost may not meet crop nutrient demand without supplemental inorganic fertilizer.
Therefore, Statement I is true and Statement II is false.
CONTRAST AND CROSS-CHECK
“Both statements are true” confuses soil-amendment value with fertilizer-equivalent nutrient concentration.
“Both statements are false” ignores the defining aerobic, controlled decomposition process.
“Statement I is true but Statement II is false” separates the valid process definition from the overstrong nutrient-equivalence claim.
“Statement I is false but Statement II is true” reverses both supported findings.
The appropriate result is: Statement I is true but Statement II is false.