Laravel select option selected from database how can I make it

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PHP

Undefined variable: conservancys (0)

that is the error i am getting.
i want to select the conservancy_name only .how do i make it.

What I have tried:

my home controller

}
public function conservancys() {
    $conservancys = DB::select('select * from conservancy_tb');
    return view('user_applicationform',['conservancys'=>$conservancys]);

}

my applicationform where i am making select case

<select name="conservancy">
  @foreach($conservancys as $conservancy)
    <option value="{{ $conservancys->id }}" {{ ($conservancys->conservancy_id == $conservancy_name) ? "selected" : "" }}>{{ $conservancys->conservancy_name }}</option>
  @endforeach
</select>