What could have gone wrong? I need answers

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This is my small farm, and this maize here is four (4)months old, but as you can see, the growth is stunt, even flowered at such small height, not even up to 50cm high, you can see the cob right there, my question is, what could have gone wrong???

I need answers !
AsapIMG_20180826_152040_124.jpg

What could have gone wrong? I need answers | Ecency