Table 2 Coefficient of correlation between cover crop above-ground biomass and C content collected in the prior fall and main crop yield for each year at site A and B at Ridgetown, Ontario.

From: Cumulative impact of cover crops on soil carbon sequestration and profitability in a temperate humid climate

Rotation (main crop yield Mg ha−1)

CC above-ground biomass from previous fall (kg ha−1)

CC above-ground C content from previous fall (kg C ha−1)

Site A

Site B

Site A

Site B

Pea

–y

–

–

–

CC fbz sweet corn

− 0.065

0.213

− 0.066

0.221

CC fb spring wheat

− 0.157

0.191

− 0.020

0.197

CC fb tomato

− 0.155

0.155

− 0.170

0.049

CC fb grain corn

− 0.485

0.148

− 0.570

0.134

Squash

–

–

–

–

CC fb soybean

− 0.388

0.046

− 0.379

0.025

Winter wheat

–

–

–

–

CC fb tomato

0.225

0.594

0.220

0.525

  1. zfb = followed by.
  2. yNo cover crop was planted in the rotation before these main crops (i.e. after grain corn and soybean); therefore, no correlation was evaluated.
  3. Bold font indicates statistically significant correlation at P < 0.05.
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