Effect of Different Acidifying Agents on Amendment in Buffering Capacity of Soil
2020
Rising population has globally challenged the food security for all livings,
which ultimately need the agricultural land expansion to meet the demands.
For cultivations, along with other parameters, optimal availability of most of
the nutrients is found at pH less than 6. And alkaline soils covering more than
one fourth of the earth's surface constrain the wide range of available land for
cultivations. Amendments in pH are usually brought out by the addition of either
synthetic chemicals or natural biomass but, effectiveness of any amendment
is directly resisted by soil’s buffering capacity. Buffering capacity retains the
pH of the soil. This study is designed to lower the soil pH as well as to maintain
it efficiently, over a long period of time by using various chemicals. Chemicals
tried to reduce the soil pH in this study were: aluminum sulphate (Al2(SO4)3),
hydrogen peroxide (H2O2), hydrochloric acid (HCl) and sulphuric acid (H2SO4).
The chemicals were employed on three different textured soils in batch, both
individually and in combinations. The buffering capacity of different soils was
related with soil textures to compare the effects of chemical amendments on
individual soils. The soil-water (1:1) paste was kept at room temperature for five
months after the application of treatment. Most of the chemical treatments not
only lowered the pH significantly but retained it as well for longer period of time,
indicating suitability of cultivation at desired acidic pH, ranging from 3-6.
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