Figure 5. Effects of different chicken mature on Zn contents in calcareous brown soil before and after the application of municipal sludge and the removal of heavy metals have changed to some extent compared with the control

From

Responses of Maize (Zea mays L.) Protein Starch Content, Municipal sludge and Different Chicken Manure on Calcareous Brown Soil Seedling in Shanxi Province China

Haixia Zheng, Yu Feng, Qingrong Zheng, Zhengming Luo, Yanjun Hou, Yushan Bu, Hafeez Noor

Journal of Food and Nutrition Research. 2022, 10(10), 630-641 doi:10.12691/jfnr-10-10-1