Nirby Blog
Practical guides for farms that count every hectare.
How to keep records without extra work, read satellite maps, take soil samples, build variable rate maps and work out your cost of production. Straight to the point, with examples from the field.
- Regulations & records
Electronic spray records: what to record, how long to keep records and how to avoid duplicate data entry
Electronic spray records from 2027: required data, retention period, a sample entry and a practical way to avoid duplicate data entry.
- Precision agriculture
NDVI, NDMI and NDRE: how to read satellite maps of your fields
What NDVI is, how it differs from NDMI and NDRE, and how to read the colours on a satellite field map. Typical values, common mistakes and next steps.
- Precision agriculture
Variable rate application (VRA) maps: from field zones to an ISOBUS-ready file
How a variable rate application (VRA) map is made: zones, rates, ISOXML and Shapefile formats, loading it onto an ISOBUS terminal and common mistakes.
- Precision agriculture
Soil sampling: when to sample, how deep to go, and grid vs management zones
How to take soil samples: timing, depth, number of cores, walking pattern, grid vs zones, what to order from the lab and how to read the results.
- Farm economics
Cost of production per hectare: how to calculate costs and profitability by field
How to calculate cost of production per hectare: hourly machinery rate, gross margin, break-even point and a step-by-step winter wheat example.
