Table 5 The integrated effect of feldspar (FD), Filter cake (FC) treatments and their combinations with biofertilizer on the uptake (kg ha^− 1) of nitrogen (N), phosphorous (P), and potassium (K) of potato tubers after two successive seasons (2021/2022–2022/2023)

2021/2022

Control

80.20e

105.06de

92.63c

14.43e

27.31de

20.87c

201.8e

299.4de

250.6c

100FD

273.10b-e

210.14b-e

241.62b

45.63cde

52.65cde

49.14bc

625.7b-e

527.4cde

576.6bc

100FC

518.86a

336.00abc

427.43a

125.51ab

89.24a-d

107.38a

1192.1ab

859.5bcd

1025.8a

75FD + 25FC

159.68cde

415.71ab

287.70b

55.68b-e

130.11a

92.89a

511.4cde

1563.8a

1037.6a

25FD + 75FC

286.62b-e

366.71abc

326.67ab

76.69a-e

100.51abc

88.60ab

720.7b-e

1064.7abc

892.7ab

50FD + 50FC

248.29b-e

309.59a-d

278.94b

69.32a-e

91.33a-d

80.33ab

658.6b-e

847.4bcd

753.0ab

Mean (MBc)

261.13a

290.53a

64.54b

81.86a

651.70b

860.38a

LSD (P ≤ 0.05)

A = 53.24

B = 138.43

AB = 228.52

 A = 16.75

B = 43.57

AB = 71.92

 A = 143.42

B = 372.94

AB = 615.64

2022/2023

Control

81.06e

105.92de

93.49c

15.36e

28.24de

21.80c

202.4e

300.1de

251.3c

100FD

273.96b-e

211.00b-e

242.48b

46.56cde

53.58cde

50.07bc

626.4b-e

528.1cde

577.2bc

100FC

519.72a

336.86abc

428.29a

126.43ab

90.17a-d

108.30a

1192.7ab

860.2bcd

1026.5a

75FD + 25FC

160.54cde

416.57ab

288.56b

56.60b-e

131.04a

93.82a

512.0cde

1564.5a

1038.3a

25FD + 75FC

287.48b-e

367.57abc

327.53ab

77.61a-e

101.44abc

89.53ab

721.4b-e

1065.4abc

893.4ab

50FD + 50FC

249.15b-e

310.45a-d

279.80b

70.25a-e

92.26a-d

81.25ab

659.3b-e

848.1bcd

753.7ab

Mean (MBc)

261.99a

291.39a

65.47b

82.79a

652.37b

861.05a

LSD (P ≤ 0.05)

A = 53.24

B = 138.43

AB = 228.52

 A = 16.75

B = 43.57

AB = 71.92

 A = 143.42

B = 372.94

AB = 615.64