Abstract
The study aims to investigate the response of corn (Variety Veto) to different levels of Magnesium and Potassium fertilizers in calcareous soil. A field experiment was conducted during the Season 2015 at north of Iraq /Irbil . The experiment was designed as(RCBD) with two factors. The first was magnesium fertilizer which was added at four levels (0,60,120,180 kg mg.ha-1)as Magnesium sulfate (Mgso4.7H2o) .while The second factor was Potassium fertilizer was added at four levels (0,80,160,240 kg k.ha-1) as potassium sulfate (K2so4). Addition of Mg and K-fertilizer significantly increased dry weight .The highest value of dry weight was at Mg3K2 (22.37 g.plant-1) Results indicated That application of Mg and K-fertilizers significantly increased the grain yield .The percentage of increase were 22.27% , 39.56% and 20.22% at levels Mg1 ,Mg2 and Mg3 respectively compared with control Mg0 the effect of K-fertilizer was significant and the percentage of increase compared with control K0 were 33.61% , 54.35% and 50.65% at levels K1 ,K2 and K3 respectively . The highest value of grain yield was at Mg2K2(5544.16 Kg.ha-1) The increase in grain yield was mainly due to the number of grain .cob-1 and secondly to the weight of 100 grains.
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