Agricultural compositions which comprise: (i) a secondary nutrient or micronutrient; (ii) benzoic acid or a biologically acceptable derivative thereof; and (iii) a water soluble salt of Formula (I) wherein R1 is a C1-10alkenyl group, or a C2-10alkenyl group and M is a cation of valency n for administering a secondary nutrient or micronutrient to plants. Also formulations containing the compositions and methods of their use are included.