Cover crop species

Cu rate (mg kg⁻¹)

Average

0

5

10

20

1. Crotalaria (Smooth crotalaria)

2.85b

3.49c

3.77c

2.92b

3.25c

2. Crotalaria (Showy Crotalaria)

8.00ab

6.53bc

8.50bc

5.99b

7.25bc

3. Calopogonio (Calapo)

4.17ab

6.24bc

5.86bc

6.38b

5.66bc

4. Pueraria (Tropical Kudzu)

7.33ab

3.44c

3.55c

2.74b

4.26bc

5. Pigeonpea (black)

6.18ab

6.32bc

4.57c

6.45b

5.88bc

6. Lablab

11.14ab

6.25bc

10.99abc

3.35b

7.93b

7. Black velvet bean

11.11ab

16.24a

17.69ab

19.34a

16.09a

8. Gray velvet bean (Bengal bean)

13.13a

9.66abc

17.03ab

20.29a

15.03a

9 Jack bean

10.65ab

13.13ab

21.19a

19.41a

16.09a

Average

8.28a

7.92a

10.35a

9.65a

9.05

F-Test

Copper rate (Cu)

**

Cover crop species (C)

**

Cu X C

**

CVCu(%)

36.55

CVC(%)

36.07