Based on the concentrations of aqueous Fe, and assuming each horizon had equal amounts of Fe(III) to begin with, does the A, Bt1 or Bt2 horizon enter the Fe(III) reduction stage first? a. horizon
b. Bt1 horizon
c. Bt2 horizon

A Horizon.

Explanation:

A Horizon enters the Fe(III) reduction stage first because more concentration of microbes present in A horizon which started Fe(III) reduction stage first than the B horizon. So if each horizon had equal amounts of Fe(III) then Fe(III) reduction stage first started in A horizon and provide iron to the plants. A horizon is also refers to the top soil layer which contains dark colored decomposed organic matter, which is also called "humus".

community or area create social relationships that typically differ greatly from the affiliations ultimate effects of travel experiences on the population in areas of origin, as well as in places of wage of only a dollar or two. motorcoach operators, museums, and restaurants fall into the broad category of public

explanation:

heat released by collision processes during accretion, and heat from decay of radioactive elements

explanation: