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Table 4 Effects of DAP dose and plant density on pea nodulation at Miti, Kabare, eastern DRC

From: Di-ammonium phosphate (DAP) and plant density improve grain yield, nodulation capacity, and profitability of peas (Pisum sativum L.) on ferralsols in eastern D.R. Congo

DAP dose (kg ha−1)

Plant density

Adei

Rwanda (CR)

Total number of nodules per plant

Total number of active nodules

Total number of nodules per plant

Total number of active nodules

0

100,000

19.7 ± 2.8b

7.1 ± 2.5b

17.8 ± 1.7c

5.1 ± 2.1b

166,666

19.3 ± 2.6b

7.6 ± 2.3b

22.6 ± 2.3b

6.5 ± 2.3b

250,000

16.9 ± 1.8c

7.5 ± 2.2b

17.3 ± 1.9c

7.8 ± 2.9b

150

100,000

48.5 ± 2.1a

11.2 ± 3.2a

34.4 ± 2.4a

9.9 ± 3.2a

166,666

46.3 ± 3.1a

10.2 ± 2.2a

28.8 ± 3.1a

9.1 ± 2.6a

250,000

47.2 ± 2.2a

9.5 ± 2.6b

29.8 ± 2.5a

7.9 ± 3.5b

100

100,000

21.1 ± 2.8b

7.2 ± 2.6b

32.7 ± 2.5a

8.7 ± 2.7b

166,666

42.6 ± 3.9a

9.5 ± 2.2b

32.4 ± 2.6a

7.3 ± 2.6b

250,000

39.9 ± 2.6a

10.2 ± 2.1a

28.9 ± 3.3b

6.7 ± 2.1b

200

100,000

30.2 ± 2.1a

9.1 ± 2.4a

32.1 ± 3.2a

9.1 ± 2.5a

166,666

47.5 ± 2.1a

9.2 ± 3.2b

32.4 ± 2.8a

8.4 ± 2.8b

250,000

38.7 ± 2.2c

9.4 ± 2.8b

31.8 ± 2.2a

8.7 ± 3.2b

P value

Varieties (A)

0.004**

0.014*

  
 

Doses (B)

0.006**

0.011*

  
 

P. densities (C)

0.006**

NS

  
 

A*B

0.042*

NS

  
 

B*C

0.032*

0.01*

  
 

A*C

NS

NS

  
 

A*B*C

0.043*

0.004**

  

LSD0.05

 

4.91

2.12

  

CV (%)

 

13.67

15.2

  
  1. Means followed by the same lowercase letter in the column do not differ from each other by the LSD test
  2. CV coefficient of variation, LSD least Significant Difference of means, ns: not significant (p > 0.05)
  3. *Significant (p < 0.05)
  4. **Highly significant (p < 0.01)
  5. Statistics results of performed tests are italicized in the Table