Cover crops

Regression equation

R²

ZnRMRDW¹

Zn rate vs RDW of smooth crotalaria

Y = 0.028 + 0.0037X − 0.000091X²

0.80^**

20

Zn rate vs RDW of pueraria

Y = 0.039 + 0.0029X − 0.000080X²

0.60^*

18

Zn rate vs RDW of lablab

Y = 0.387 + 0.0213X − 0.00044X²

0.50^*

24

Zn rate vs RDW of gray velvet bean

Y = 0.453 + 0.0140X − 0.00087X²

0.73^**

20

Average of 10 cover crops

Y = 0.240 + 0.0087X − 0.00021X²

0.46^*

22