Asian Journal of Plant and Soil Sciences

It is known that organic fertilization is environmentally beneficial as well as the vital role of magnesium (Mg) as a co-enzyme with enzymes that build oils and fats is known. However, to our knowledge, no research has been done on the combined effect of different sources of compost and different rates of magnesium (Mg) on coriander plants.    So, two field experiments were executed aiming at assessing three compost sources [PC: Plant compost, FYM C: Farmyard manure compost, and TR C: Town refuse compost, at rate of 30.0 m³ ha^-1 for each source] plus control (without compost) on coriander plants as main plots. While the sub-main plots were assigned for Mg rates as exogenous applications [0.00, 500, 1000, and 1500 g ha^-1] using magnesium sulphate (MgSO₄, consisting of 20.19 Mg²⁺ % by mass). Some parameters i.e., plant height (cm), fresh and dry weights (g plant^-1), No. of branches plant^-1, No. of umbels plant^-1, chemical constituents in leaves (N, P, K, Mg %) the, weight of 1000 seeds (g), seed yield, (g plant^-1& kg ha^-1), oil percentage and oil yield (ml plant^-1& L ha^-1) were determined. The results showed that the plant compost treatment was the superior for obtaining the maximum values of all studied parameters followed by FYM C treatment then TR C treatment and  lately control treatment (without compost). Regarding the magnesium treatments, the results illustrated that the values of all studied parameters increased as the Mg rate increased. Generally, it can be concluded that treating soil with plant compost at rate of 30.0 m³ ha^-1 before cultivation and simultaneously spraying the grown coriander plants through their life period with Mg at rate of 1500 g ha^-1 is the best-combined treatment, which will achieve pronounced achievement in plant performance and yield.