arable brown soil

Compared with the data of the second soil general survey,the pH value decrease 0.88.4. Analysis on the reason of soil acidification,the BS of arable brown soil has a downtrend.
4.分析研究區耕地棕壤酸化原因,土壤鹽基飽和度降有降低趨勢,導致土壤酸化。