Periods ofevaluation

Heights of Residues (cm)

Mean

10

20

30

40

Jan-Mar

11.42

16.00

18.60

13.43

14.86

Apr-Jun

14.50

11.63

15.22

12.06

13.35

Jul-Sep

9.34

12.26

15.50

17.15

13.56

Oct-Dec

9.88

11.00

13.42

9.75

11.01

Mean

11.30

12.72

15.69

13.10