Variable

Regression equation

R²

ZnRMRL¹

1. Zn rate vs MRL of Sunn hemp

Y = 11.98 + 0.15X − 0.0061X²

0.53^*

13

2. Zn rate vs MRL of smooth crotalaria

Y = 10.73 + 0.0732X − 0.0043X²

0.53^*

9

5. Zn rate vs MRL of pueraria

Y = 8.38 + 0.6739X − 0.0161X²

0.87^**

21

6. Zn rate vs MRL of pigonpea

Y = 10.09 + 0.3287X − 0.0095X²

0.61^*

17

7. Zn rate vs MRL of lablab

Y = 21.52 + 1.0837X − 0.0220X²

0.61^*

25

9. Zn rate vs MRL of gray velvet bean

Y = 28.82 + 1.0725X − 0.0316X²

0.77^**

17

10. Zn rate vs MRL of jack bean

Y = 21.84 + 0.4242X − 0.0091X²

0.65^**

23

Average of 10 cover crops

Y =17.55 + 0.3777X − 0.0109X²

0.73^**

17