> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agrihub360.com/llms.txt
> Use this file to discover all available pages before exploring further.
# RB209 Nutrient Plans
> N, P, K, Mg and lime from your soil sample, crop and target yield.
## What It Tells You
The **nutrient plan** is the rate of nitrogen, phosphate, potash, magnesium and lime a field needs this season. It is worked out as the AHDB Nutrient Management Guide, **RB209**, sets out: from the soil sample's indices, the crop and the target yield. It is the number you order fertiliser against. It is also the number the NVZ and Nmax checks compare your applications with. Nutrient values come from the soil sample. No AgriHub360 device reads soil nitrogen.
## How It Works
Enter the soil sample, the crop and the target yield. The plan gives the rate for each nutrient. Each application recorded in the applications log updates what remains on the plan. The plan feeds the nitrogen checks in [Compliance & Records](/features/compliance-and-records).
