The soil is acid soil can improve crop plants. The soil conditions are suitable for growing plants using natural methods, along with the soil is dry, wet and vice versa. To speed up the chemical reaction of the soil. Until the soil is very acid. 'Soil to extreme sour' until the point where plants can not thrive. Then find ways to improve the soil, groundwater levels.
The patent application was presented on 5 October 2550.
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