Study on the Predictive Algorithm of Plant Restoration under Heavy Metals

Table 1

Grade of heavy metal pollution in gardens.

Land accumulation index	Index level	Accumulative degree
5–10	6	Ponderosas
4-5	5	Weight
3-4	4	Serious
2-3	3	Moderate weight
1-2	2	Moderate
0-1	1	Mild
≤0	0	Mild