Which factors improve soil fertility? select the three correct answers. a. humus b. bedrock c. horizon d. nitrogen e. manure

Correct answer choices are :

A) Humus

E) Manure

D) Nitrogen

Explanation:

Soil fertility leads to the capability of a soil to support agricultural plant growth, i.e. to produce plant environment and occur in continued and steady yields of high quality. A fertile soil will include all the important nutrients for basic plant nourishment, as well as other nutrients required in smaller amounts.

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explanation:

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

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