What are the causes of soil compaction?

Factors which lead to or favour soil compaction are

- use of heavy vehicles, equipment on field and

- type and condition of soil also plays an important role in causing soil compaction.

Explanation:

The causes of soil compaction are as follows –  

a)Use of heavy machines on field – Use of heavy axle machines with weight exceeding 10 tons causes compaction of soil to greater depth.  

b)Frequent and early planting also causes soil compaction due to continuous weight on soils.  

c)Soil type -  Soils with low level of organic matter are more susceptible to compaction as they do not have gravels (aggregate) to resist the compaction forces.  

d)Soil condition – Wet clay soils are easily compactible as compared to sandy soil.  

individual oxygen atoms are formed during photosynthesis.-c.

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.