Porosity and void ratio. Porosity and void ratio are the
physical soil properties derived from bulk density and
particle density and indicate the total pores and the ratio
of voids to the solids. The effect of various amendments
and their combination on total porosity, percent pore
space and void ratio of the sodic soil was significant
statistically (Table II). The most efficient treatment here
was also the combination of gypsum, sulfuric acid and
FYM. The most inferior treatment was sole application of
FYM, even which was significantly better than control.
The treatments of gypsum and sulfuric acid proved
superior to FYM but inferior to various combinations.
There is inverse relationship between bulk density and
porosity/void ratio. Therefore, a decrease in the value of
former resulted in an increase in the latter.