# Pollination model unexpected results for crop yield

**URL:** <https://community.naturalcapitalalliance.org/t/pollination-model-unexpected-results-for-crop-yield/4696>\
**Category:** Science, Research & Data\
**Tags:** pollination\
**Created:** [April 29, 2024, 12:09pm UTC](https://community.naturalcapitalalliance.org/t/pollination-model-unexpected-results-for-crop-yield/4696 "2024-04-29T12:09:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sibylles](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@sibylles](https://community.naturalcapitalalliance.org/u/sibylles)\
**Post date:** [April 29, 2024, 12:09pm UTC](https://community.naturalcapitalalliance.org/t/pollination-model-unexpected-results-for-crop-yield/4696/1 "2024-04-29T12:09:07Z")

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Dear community,

As discussed here I am running the pollination model using a different farms map. My “farms” are apple fields. So half\_sat, p\_managed, fr\_spring…, n\_cavity, n\_ground, p\_dep and season are all the same for all apple fields. However Pabund (average pollinator abundance on the farm) divers: 0.028 to 0.212.

Based on the model mathematical framework it is unexpected to me, why y\_tot (total yield index = 1), pdep\_y\_w (index of potential pollinationd ependent yield = 1) and y\_wild (index of the total yield attributalbe to wild pollinators = 0.9) are all the same.

Thanks  
Sibylle

@elonsdorf  
@jesseG  
@jdouglass  
@swolny