The biochemical transformation of inorganic phosphorus into organic compounds is termed:_________?
Show answer Hide answer
Answer: B. Immobilization
Explanation
Immobilization is the microbial conversion of inorganic forms of nutrients like phosphorus and nitrogen into organic, biologically bound compounds. Soil microorganisms take up these available inorganic ions as they decompose carbon-rich organic residues. Consequently, nutrient availability for higher plants drops temporarily during active microbial growth. Microbial immobilization is the exact opposite of mineralization within the complex global nutrient cycle. Soil bacteria and fungi assimilate mineral ions into their cellular biomass for growth and division.
Farmers must account for nutrient immobilization when applying fresh organic amendments like straw to agricultural soils. Failure to manage this microbial drawdown can lead to temporary nutrient deficiencies in growing crops. Option A, mineralization, is the microbial release of inorganic ions from organic matter. Option C, solubilization, converts insoluble mineral compounds into accessible soluble forms. Option D is incorrect because mineralization does not form organic phosphorus.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Continuous phenotypic variations are ascribed to____________________?
Show answer Hide answer
Answer: A. Crossingover
Continuous phenotypic variations, such as height and yield, are primarily the result of polygenic inheritance enhanced by genetic recombination from crossing over. During meiosis, homologous chromosomes exchange genetic...
Q2. Citrus rootstock varieties are routinely propagated via_________________?
Show answer Hide answer
Answer: A. Seeds
Citrus rootstocks are commonly raised from seeds to maintain genetic uniformity and vigor, and to avoid viral pathogens. Nucellar embryony in many citrus species produces seedlings that are genetic clones of the maternal...
Q3. Cosmos, chrysanthemums, and poinsettias serve as classical examples of _________________?
Show answer Hide answer
Answer: B. Short day plants
Cosmos, chrysanthemums, and poinsettias require long nights (short days) to initiate flowering, making them classic short-day plants. Their internal photoperiodic receptors measure continuous periods of darkness before t...
Q4. Water corrosivity serves as an indicator of___________________?
Show answer Hide answer
Answer: C. Both a & b
Water corrosivity is an indicator of both mineral composition/salinity and the presence of dissolved pollutants or reactive materials. Highly mineralized or acidic water aggressively attacks metallic pipes and infrastruc...
Q5. Limpid water containing organic debris or silt alongside negligible biological activity is designated__________________?
Show answer Hide answer
Answer: A. Oligotrophic
Oligotrophic water bodies are characterized by low nutrient levels, clear water, and minimal biological productivity. These aquatic ecosystems feature deep penetration of sunlight and high dissolved oxygen concentrations...
Q6. Citrus rootstock seedlings achieve readiness for budding following an interval of_____________________?
Show answer Hide answer
Answer: C. 01 months
Citrus rootstock seedlings generally reach a suitable stem diameter for budding within about one year (or specific early intervals depending on management).