Table 6 Effect of bacterial treatments tested on growth and production parameters of potato cv. Spunta plants depending on cropping seasons

Root fresh weight (g)

Late season

17.32 e^c+

32.95 a

21.35 cde

26.55 bc

20.15 de

27.60 b

23.00 bcd

24.13 a

Extra-early season

21.67 b

38.83 a

42.30 a

19.93 b

18.43 b

21.17 b

22.00 b

26.33 a

Season

12.33 a

15.33 a

17.47 a

18.27 a

14.07 a

16.27 a

14.13 a

15.41 b

Average^b*

17.11 c

29.04 a

27.04 a

21.58 b

17.55 c

21.68 b

19.71 bc

Aerial part fresh weight (g)

Late season

170.82 c

192.55 bc

232.85 ab

275.05 a

285.25 a

255.10 a

257.40 a

238.43 a

Extra-early season

79.83 c

140.73 a

125.07 ab

95.82 bc

129.13 ab

106.73 abc

114.80 abc

113.16 c

Season

114.00 c

161.67 b

165.73 ab

207.27 a

145.80 bc

145.60 bc

130.40 bc

152.92 b

Average^b

121.55 c

164.98 b

174.55 ab

192.71 a

186.73 ab

169.14 ab

167.53 ab

Tuber fresh weight (g)

Late season

535.93 c

609.80 bc

665.15 b

594.35 bc

886.65 a

576.85 bc

697.80 b

658.08 b

Extra-early season

482.20 a

554.30 a

538.63 a

428.07 a

555.80 a

524.37 a

444.67 a

504.00 c

Season

895.80 a

1087.80 a

924.27 a

933.27 a

1007.00 a

956.47 a

946.13 a

964.39 a

Average^b

637.98 c

763.97 ab

709.35 bc

651.89 c

816.48 a

685.89 bc

696.20 bc

Yield (T/ha)

Late season

33.16 d

40.21 bc

41.16 bc

36.78 bcd

54.86 a

35.69 cd

43.18 b

40.72 b

Extra-early season

29.84 a

34.30 a

33.33 a

26.49 a

34.39 a

32.45 a

27.51 a

31.19 c

Season

55.43 a

67.31 a

57.19 a

57.75 a

62.31 a

59.18 a

58.54 a

59.67 a

Average^b

39.47 c

47.27 ab

43.89 bc

40.34 c

50.52 a

42.44 bc

43.08 bc