# Possible discrepancies in Crop Production results **URL:** \ **Category:** Software Support\ **Tags:** crop-production\ **Created:** [January 28, 2020, 12:48pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774 "2020-01-28T12:48:29Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [January 28, 2020, 12:48pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/1 "2020-01-28T12:48:29Z")
Hello, I am using InVEST in my PhD. work. I am not sure about my results from Crop Production model. Some results in “results table” are extremely different. Sometimes observed production is higher like a percentile production (e.g. oilseednes in my table). Percentiles would have show intensification level, observed production is production without intensification? Further for example alfalfa has very small observed production but percentiles are extremely high. Could you explain this results table? Is it correct? Thank you. [result\_table\_2016.csv](https://community.naturalcapitalalliance.org/uploads/short-url/1vMSuv2NWbbxv70JeaIyVuSHekE.csv) (33.4 KB) ![interested_area](https://canada1.discourse-cdn.com/flex031/uploads/naturalcapitalproject/original/1X/4d0799cd5e312eb2b70dbcefc43f012a3fec2910.png) Martin, Slovakia ---
**Author:** ![jdouglass](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/jdouglass/32/9_2.png) [@jdouglass](https://community.naturalcapitalalliance.org/u/jdouglass)\ **Post date:** [February 4, 2020, 8:58pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/2 "2020-02-04T20:58:36Z")
Hi @Martin, offhand, I’m not sure what’s going on here. Could you attach your logfile and maybe link to your data inputs so that we can take a look? Thanks, James ---
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [February 5, 2020, 9:06am UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/3 "2020-02-05T09:06:24Z")
Hi @jdouglass, thank you for your response. This is my raster [2016\_5\_5.tif](https://community.naturalcapitalalliance.org/uploads/short-url/bIENLgU1DXP0L3mA2s1HIprl0ND.tif) (585.6 KB) , landcover to crop table [landcover\_to\_crop\_table1.csv](https://community.naturalcapitalalliance.org/uploads/short-url/w8BPpGijfXmyjv8BEw37aSZTjjW.csv) (277 Bytes) and logfile (I dont know add third link) Martin ---
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [February 5, 2020, 9:07am UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/4 "2020-02-05T09:07:08Z")
Logfile [InVEST-Crop-Production-Percentile-Model-log-2020-02-05–09\_41\_29.txt](https://community.naturalcapitalalliance.org/uploads/short-url/x3M5mDKdqC1N9nvSgmgoFRwRtC1.txt) (85.4 KB) ---
**Author:** ![jdouglass](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/jdouglass/32/9_2.png) [@jdouglass](https://community.naturalcapitalalliance.org/u/jdouglass)\ **Post date:** [February 5, 2020, 10:49pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/5 "2020-02-05T22:49:57Z")
Thanks for these, Martin! I don’t see anything clearly wrong with how the model is functioning, so I’ve reached out to the model’s science lead to see if he could chime in on this. More soon! ---
**Author:** ![jandrewjohnson](https://avatars.discourse-cdn.com/v4/letter/j/85f322/32.png) [@jandrewjohnson](https://community.naturalcapitalalliance.org/u/jandrewjohnson)\ **Post date:** [February 10, 2020, 3:36pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/6 "2020-02-10T15:36:51Z")
Hi Martin, I took a look as well and I don’t see anything that looks incorrect. But to answer your question, the percentile yield can differ substantially from observed yield due to how the percentile climate bins were calculated. Basically, if you have a specific high-yielding pixel in a climate bin that typically has lower yield and you choose to model the intensification level via choosing a percentile, it is quite possible that these high-yield pixels will be brought down (though probably this is offset overall by increases elsewhere). I’m not sure if I’ve answered your question, but I think it would also be worth noting that the InVEST crop model is best used for large-scale assessment and prioritization. For detailed, small-extent studies, we recommend using crop models more refined for that location. ---
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [February 11, 2020, 10:39am UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/7 "2020-02-11T10:39:15Z")
Hi Andrew, thank you very much for your response and explain. Probably my interest area is too small for model. I will try another evaluation method and I will compare with InVEST crop production. Martin ---
**Author:** ![dcdenu4](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dcdenu4/32/544_2.png) [@dcdenu4](https://community.naturalcapitalalliance.org/u/dcdenu4)\ **Post date:** [February 11, 2020, 8:05pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/8 "2020-02-11T20:05:03Z")
@Martin if you think of it, we’d love for you to share the comparison once you’ve tried another evaluation method! ---
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [February 12, 2020, 11:05am UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/9 "2020-02-12T11:05:20Z")
@dcdenu4 Yes of course. When I try another method and compare it, I will send the results here. ---
**Author:** ![EcoNabil](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/econabil/32/1069_2.png) [@EcoNabil](https://community.naturalcapitalalliance.org/u/EcoNabil)\ **Post date:** [November 15, 2020, 5:45pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/10 "2020-11-15T17:45:54Z")
Hey Martin, i am an ingeneer student in ecologie in my last year of study and i really liked your work, so i’m looking forward to doing something like that. I wanna know how did you draw your map 2016\_5\_5.tif [https://community.naturalcapitalalliance.org/uploads/short-url/bIENLgU1DXP0L3mA2s1HIprl0ND.tif](https://community.naturalcapitalalliance.org/uploads/short-url/bIENLgU1DXP0L3mA2s1HIprl0ND.tif) thank you very much 🙂 ---
**Author:** ![Martin](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/martin/32/538_2.png) [@Martin](https://community.naturalcapitalalliance.org/u/Martin)\ **Post date:** [November 16, 2020, 1:23pm UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/11 "2020-11-16T13:23:56Z")
Hi Nabil, Thank you for your interest. I drawn my map from google ortophoto maps and ortophoto maps from mapy.cz. It was “click” handmade work in QGIS. Martin ---
**Author:** ![EcoNabil](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/econabil/32/1069_2.png) [@EcoNabil](https://community.naturalcapitalalliance.org/u/EcoNabil)\ **Post date:** [November 17, 2020, 10:11am UTC](https://community.naturalcapitalalliance.org/t/possible-discrepancies-in-crop-production-results/774/12 "2020-11-17T10:11:29Z")
Hi Martin, Thanks for the information it was a great work. Nabil