deletions | additions       diff --git a/Nt_Aphid_population_size_at__.tex b/Nt_Aphid_population_size_at__.tex  index 4012436..cd355dd 100644  --- a/Nt_Aphid_population_size_at__.tex  +++ b/Nt_Aphid_population_size_at__.tex 
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Nt \textbf{Nt}  Aphid population size at time t (aphids/plant) N0 \textbf{N0}  Aphid population size at time 0 (aphids/plant) r \textbf{r}  Intrinsic rate of increase (aphids/aphid/day) a \textbf{a}  Decrease of r per unit time as host plant advances in phenological stage t \textbf{t}  Soybean degree days Also, soybean yield decreases by 0.688% per 1,000 aphid days per plant.