Soil compaction results from a. the reduction or elimination of pore space in soil b. the weight of heavy machinery on soil c. livestock walking over soil d. all of the above

The correct answer is D. All of the above.

Soil compaction is termed as the compression of particles of small to small volume which are then reduces their pore space size which is being available for water and air.

Soil compaction can result from;

1. Elimination or reduction of pore space in soil.

2. Heavy weight machine on soil.

3. Livestock walking over the soil.

Soil compaction can result to decrease in crop production and increase in erosion of soil.

T he purpose of the soil compaction is that large water pressure which is build up and causes soil liquefy in the time of earthquake.

All of these.

Explanation: Compaction of soil can be defined as the compression of the soil particles into smaller volume which will reduce the pore space and it will provide more space for water and less space for air.

It can be done by many ways. Some of the ways are suggested here. The reduction of pore space in the soil.

The weight of heavy machinery on the soil will reduce the pore space of the soil.

The livestock walking also reduces the pore space of the soil and helps in soil compaction.

i think it is dna, i'm not totally sure but i think it might be.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.