| Sumario: | The effects of dried flesh meal (I), dried blood meal (II) and olive cake
(III) on three texturally different soils were studied. Mixtures "soil plus
marrare" were ineubated in 'twist condition at room temperature and after
periods of 60 and 120 days their hydraulic conductivity, aggregate sizz-•
distrihution, residual fats and nitrogen were determined and compared with
the initial values.
The results obtained reveal: 1) An, initial decrease of the hydraulie con--
ductivity in all samples, speeiallv (I) and (II) in the soils of fine textu're.
Along with the decompositions of the organie. matter the hidraulic conductivity
values inerease and, after 60 days of moist incubation, they become from 4 to
26 times higher than at the begining of the trial. The highest permeabilities
were observed with (1) and (II) when, applied lo a loamy el.ay soil.
2) The fats of both (I) and (III) were reduced to 12-2.5 % and 4-9 % of
their original content, after 60 and 120 days, respectively, of incubation.
3) The nitrogen losses after 60 and 120 days were, respectively, 1446 % and
33-66 %. The higher losses took place with (1) in sandy and loamy soils.
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