TB^a

PB

RB

-----------------------------------g-------------------------------

Raised beds effect

Flat

357.7

326.9

30.8

Raised beds

392.6^‡‡

357.5

35.1***

Fe-EDDHA

No Fe-EDDHA

376.8

343.0

33.8

Fe-EDDHA^b

373.5

341.3

32.2