Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation to Phosphorus Fertilization, Crop Sequence and Tillage Management

Table 2

Description of the experimental design in the study.

Treatments		Phases
	1st	2nd	3rd
Tillage	CT	CT	CT
	ZT	ZT	ZT
Crop rotation	Spring wheat	Flax	Durum wheat
	Canola	Flax	Durum wheat
P fertilization (kg MAP ha^−1)	0	0	25
	0	25	0
	25	0	25
	25	25	0
	50	0	25
	50	25	0