18. The following are examples of acidifying processes that produce hydrogen ion

Question

18. The following are examples of acidifying processes that produce hydrogen ions (H) except a. Addition of calcium and lime to the soils b. Addition of Carbonic and Other Organic Acids to soils c. Accumulation of Organic Matter in the soils d. Oxidation of Nitrogen (Nitrification) in the soils e. Plant Uptake of Cations 19. Excessive rainfall may result in soil acidification because H*i ons added to the soil solution exchange while percolation rainwater washes away the released nonacid cations a. True b. False 20. Soil total acidity is made up of a. Active acidity + residual acidity b. Salt-replaceable (exchangeable) acidity c. Residual acidity d. Active acidity + residual acidity+ Salt-replaceable (exchangeable) acidity e. Salt-replaceable (exchangeable) acidity +Residual acidity

Explanation / Answer

18. a) Addition of calcium and lime to the soils.

Explanation : The addition of lime neutralizes the acidity of the soil and increases the pH of the soil thus decreasing it's acidity. So, the acidity of a soil is reduced by the addition of calcium and lime to it.

19. TRUE.

Explanation : Excessive rainfall may cause soil acidification by leaching away the basic cations from the soil by releasing H+ ions into the soil in the process.

20. d) Active acidity + residual acidity + salt-replaceable (exchangeable) acidity.

Explanation : The soil total acidity is the sum total of Residual acidity, Exchangeable acidity and active acidity. The residual acidity of the soil is the acidity restored in the soil solids and together with the exchangeable acidity it makes up the reserve acidity of the soil which is defined as the quantity that represents the buffer capacity of the soil.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.