Soil and Biochar were incubated for 30 days at 10 days of intervals.
Results:
Level of soil pH: 10 days>20 days20 days
When soil and Biochar are incubated for 30 days at 10-day intervals, the results may include increased soil fertility, improved soil structure, increased soil water retention, and greater soil biodiversity. Additionally, the addition of Biochar to the soil can help to improve soil health by providing an additional source of carbon and other nutrients, as well as promoting the growth of beneficial soil organisms. Biochar can also help to reduce nutrient leaching and improve soil water infiltration, which can help to improve crop yields and reduce the need for chemical fertilizers.
Assuming that the study was well-designed and replicated, to understand such data one needs much more information about the soil, the biochar and the incubation conditions
The addition of water in the incubated samples could be a reason for the fluctuation because the incubation period is short (10 days interval). Water reacts with aluminium to produce H+ (hydrolysis reaction). However, the H+ released during the hydrolysis can be lost through hydrogen gas. I would suggest a longer interval to allow the breakdown of the biochar and thereby obtaining a noticeable trend of the results.
Please, you may refer this paper: Article Amending Potassic Fertilizer with Charcoal and Sago (Metroxy...
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