hook_load and loading data form multiple rows

I'm developing module what is using taxonomy vocabularies as fields name in node. Field name contain term ID (size_$term_id). Data are stored in table production (nid = int, vid = int, tid = int, size = int) key (nid, vid, tid), now I need to somehow pass this to node fields, but all what I was able to do, is to pass one value. Any help is greatly appreciated.

function production_form(&$node) {
$type = node_get_types('type', $node);
$term_get_vocs = taxonomy_get_vocabularies($type->type);
foreach($term_get_vocs as $term_get_voc) {
    $terms = taxonomy_get_tree($term_get_voc->vid,0,-1,1);
    foreach ($terms as $term) {
	$tr = $term->name;
	$tr_id = $term->tid;
	$tr_size = 'size_'.$tr;
	$tr_id_size = 'size_'.$tr_id;

	$form["term_$tr_id"] = array(
	'#type' => 'fieldset',
	'#title' => t($tr),
	'#collapsible' => TRUE,
	'#collapsed' => TRUE,
	);
	$terms_2 = taxonomy_get_tree($term_get_voc->vid,$term->tid,-1,1);
	    foreach ($terms_2 as $term_2) {
	    $tr2 = $term_2->name;
	    $tr2_id = $term_2->tid;
	    $tr2_size = 'size_'.$tr2;
	    $tr2_id_size = 'size_'.$tr2_id;

	    $form["term_$tr_id"]["size_$tr2_id"] = array(
	    '#type' => 'textfield',
	    '#title' => t($tr2),
	    '#size' => 6,
	    '#default_value' =>  isset($node->$tr2_id_size) ? $node->$tr2_id_size : '',
	    '#maxlength' => 6,
	    '#required' => FALSE,
	    );
	    }
    }
}
return $form;

}

function production_load($node) {
$type = node_get_types('type', $node);
$term_get_vocs = taxonomy_get_vocabularies($type->type);
foreach($term_get_vocs as $term_get_voc) {
    $terms = taxonomy_get_tree($term_get_voc->vid,0,-1,1);
    foreach ($terms as $term) {
    $tr_id = $term->tid;
	$terms_2 = taxonomy_get_tree($term_get_voc->vid,$term->tid,-1,1);
	    foreach ($terms_2 as $term_2) {
	    $tr2_id = $term_2->tid;
	    $tr2_id_size = 'size_'.$tr2_id;
	    $queryResult = (db_query("SELECT size as $tr2_id_size from {production} WHERE nid = %d and vid = %d and tid = %d", $node->nid, $node->vid, $tr2_id));

// What to add here ???

	    }
  }
}
return $obj;
}