a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.
compost can be added to topsoil as a:
cellular respiration oxidizes food into energy in the form of atps.
glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >
2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)
pyruvate actively pumped mitochondrial matrix.