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Table 2 Effect of explanatory variables on the concentration of secondary and micro-nutrients in plant species

From: Nitrogen fixation by common beans in crop mixtures is influenced by growth rate of associated species

  

Response Variables

Calcium

Magnesium

Manganese

Zinc

Explanatory variables

Bean

cropping treatment

Week 5: F = 4.34, P = 0.021

Week 8: F = 2.54, P = 0.098

Week 5: F = 3.92, P = 0.025

–

Bean variety

–

Week 5: F = 16.93, P < 0.001

Week 5: F = 4.46, P = 0.043

Week 8: F = 4.25, P = 0.049

Companion crop identity

Week 5: F = 3.58, P = 0.069

Week 5: F = 3.90, P = 0.0.058

–

Week 5: F = 3.06, P = 0.092

Week of collection

–

F1,121 = 6.09, P = 0.029

F1,121 = 21.505, P = 0.008

F1,121 = 16.56, P = 0.001

Chickpeas

cropping treatment

F1,45 = 4.284, P = 0.047

–

–

–

Week of collection

–

F1,45 = 5.781, P = 0.02

F1,45 = 6.818, P = 0.019

F1,45 = 8.071, P = 0.007

Sorghum

cropping treatment

–

–

–

–

Week of collection

F1,39 = 17.849, P = 0.002

F1,39 = 14.648, P = 0.005

–

F1,39 = 11.533, P = 0.002

  1. Explanatory variables: Cropping treatment (crop mixture, monoculture, variety mixture), week of collection (week 5 or 8) and bean variety (Variety 1 or 2). ‘-‘sign represents when a variable was not significant
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BMC Plant Biology

ISSN: 1471-2229

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