diff --git a/app/ModelFilters/CropYieldFilter.php b/app/ModelFilters/CropYieldFilter.php
index 2b3fe27..538e141 100644
--- a/app/ModelFilters/CropYieldFilter.php
+++ b/app/ModelFilters/CropYieldFilter.php
@@ -13,6 +13,10 @@ class CropYieldFilter extends ModelFilter
         return $this->where('time_year', $y);
     }
 
+    public function quarter($quarter){
+        return $this->where('quarter', $quarter);
+    }
+
     public function crop($cropId)
     {
         return $this->where('crop_id', $cropId);