NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sand and silt do not retain water against gravitational pull. The above statement is
A
True
B
False
C
Not sure
D
None of the above
Explanation: 

Detailed explanation-1: -Capillary water is found in the micropores of the soil. It is held on the soil particles by surface forces, against gravity.

Detailed explanation-2: -Silt: Silty soils are finer, and smoother in texture and hold the most available water to plants. Sand does not hold any water and clay particles hold water so tightly to the particle surface that plant roots are unable to extract it from the soil.

Detailed explanation-3: -Answer: False. Water logging occurs in clayey soil, which absorbs and retains a lot of water. Sandy soil cannot absorb much water because of the large spaces between the soil particles.

Detailed explanation-4: -Soils with smaller particles (silt and clay) have a larger surface area than those with larger sand particles, and a large surface area allows a soil to hold more water. In other words, a soil with a high percentage of silt and clay particles, which describes fine soil, has a higher water-holding capacity.

There is 1 question to complete.