return crop name; scenario name

Models/CarbonSummary.cs

@@ -23,6 +23,8 @@ namespace FarmMapsAPI.Carbon.Models
 
     public class YearSummary
     {
+        [JsonProperty("crop")]
+        public string Crop { get; set; }
         [JsonProperty("year")]
         public int Year { get; set; }
         [JsonProperty("bulk_Density")]