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Table 7 Effects of the study factors on maize yield parameters

From: Assessment of the nitrogen fertilizer split-application on maize grain yield and profitability on Nitisols of South-Kivu, Eastern D.R. Congo

Factors modalities

Number of ears/plant

Weight of ear (g)

W1000G (g)

Yield (t ha−1)

SRS 2017

Variety

SAM4VITA

1.2 ± 0.2ab

277.5 ± 30.8ab

467.7 ± 76.3ab

5.0 ± 0.3b

 

PVA SYN18 (F2)

1.1 ± 0.1b

266.2 ± 31.6b

443.5 ± 80.3b

4.6 ± 0.4c

 

ZM 627

1.3 ± 0.3a

288.8 ± 26.2a

483.2 ± 73.1a

5.4 ± 0.4a

Splitting

F0

1.0 ± 0.1b

243.7 ± 22.9c

365.6 ± 21.9c

4.5 ± 0.3c

 

F1

1.5 ± 0.2a

315.4 ± 10.6a

559.3 ± 32.5a

5.5 ± 0.3a

 

F2

1.3 ± 0.1ab

282.5 ± 14.8b

485.2 ± 33.6b

5.1 ± 0.4b

 

F3

1.0 ± 0.0b

268.4 ± 11.7bc

449.2 ± 30.4b

4.8 ± 0.3bc

LRS 2018

Variety

SAM4VITA

1.3 ± 0.1ab

291.6 ± 35.0b

436.3 ± 54.8b

5.7 ± 0.4a

 

PVA SYN18 (F2)

1.2 ± 0.1b

264.4 ± 24.5C

417.1 ± 58.7b

5.5 ± 0.6b

 

ZM 627

1.4 ± 0.2a

326.4 ± 24.7a

507.0 ± 83.1a

5.8 ± 0.6a

Splitting

F0

1.1 ± 0.8b

265.8 ± 39.5b

377.2 ± 22.0c

5.1 ± 0.3b

 

F1

1.5 ± 0.2a

319.5 ± 41.7a

491.7 ± 100.2a

6.4 ± 0.3a

 

F2

1.3 ± 0.1ab

300.3 ± 28.6ab

479.5 ± 44.8b

5.8 ± 0.4ab

 

F3

1.3 ± 0.2ab

290.9 ± 21.6ab

465.0 ± 59.6b

5.4 ± 0.3b

p-value season (S)

 < 0.01**

 < 0.001***

0.174ns

 < 0.001***

p-value variety (V)

 < 0.001***

 < 0.001***

 < 0.001***

 < 0.001***

p-value N splitting (F)

 < 0.001***

 < 0.001***

 < 0.001***

 < 0.001***

p-value S × V

 > 0.05ns

 < 0.01**

 < 0.05*

 > 0.05ns

p-value S × F

 < 0.05*

 > 0.05ns

 < 0.01**

 > 0.05ns

p-value V × F

 > 0.05ns

 > 0.05ns

 > 0.05ns

 > 0.05ns

p-value S × V × F

 > 0.05ns

 > 0.05ns

 < 0.05*

 > 0.05ns

  1. SRS Short rainy season; LRS Long rainy season; a, b, c: The average of the same column and the same factor followed by the same letters are not statistically different at a probability level of 5% according to LSD test (Least Significant Difference)
  2. *significant
  3. **highly significant
  4. ***very highly significant; ns: not significant; P1000G: 1000 grain weight