Table 4: Grain Cd concentration (μg kg−1) and accumulation (mg ha−1) of durum wheat as affected by tillage system, crop rotation, and P fertilization on at two sites over 3 years.

Grain Cd concentration (μg kg−1)Grain Cd accumulation (mg ha−1)
BRC NorthMZTRFBRC NorthMZTRF
200120022003200120022003200120022003200120022003

Tillage
 Conventional120.1122.8144.282.586.183.5216380401269279247
 Reduced120.4 70.1119.881.861.399.8228205380267221289
 LSD 9.1 13.9 15.9 4.88.711.3 20 48 80 18 3137
Crop rotation
 wheat-flax-durum117.3 92.0131.178.670.590.8215270394255239270
 Canola-flax-durum123.3100.9132.985.676.992.5229316387282260266
 LSD 9.1 13.9 15.9 4.8 8.711.3 20 48 80 18 3137
P fertilization
 0-0-25117.189.9132.283.168.4 88.6223272400274226258
 0-25-0110.397.5116.280.372.9 87.9191287318265226257
 25-0-25116.994.8133.982.381.8 94.6216283393265291277
 25-25-0120.798.9126.078.568.3 83.1223307369248226239
 50-0-25131.199.7150.487.184.3111.1244304459285295329
 50-25-0125.597.8133.281.566.6 84.6234302404272237247
 LSD 15.724.1 27.5 8.315.1 19.5 35 84139 32 54 64

Analysis of variance
SourceDFPr ≥ F
Tillage1n.s.<0.0010.003n.s.<0.0010.005n.s.<0.001n.s.n.s.0.0040.025
Crop rotation1n.s.n.s.n.s.0.005n.s.n.s.n.s.n.s.n.s.0.005n.s.n.s.
P fertilization5n.s.n.s.n.s.n.s.n.s.n.s.n.s.n.s.n.s.n.s.0.014n.s.