A postdoctoral researcher measures soil pH at 5 sites: 6.2, 6.6, 5.9, 7.1, and 6.4. If the optimal pH for a rare Andean crop is 6.5, what is the average deviation from optimal?

Wed, 06 May 2026 08:58:49 +0000

A postdoctoral researcher measures soil pH at five sites: 6.2, 6.6, 5.9, 7.1, and 6.4. If the optimal pH for a rare Andean crop is 6.5, what is the average deviation from this ideal level? This question reflects growing interest in precision agriculture and climate-responsive farming practices. Soil pH plays a critical role in nutrient availability and plant health, making accurate pH assessment essential for sustainable crop cultivation—especially with rare species facing environmental pressures. Why Are Researchers Measuring Soil pH Across These Sites?
In recent years, soil testing has become a key tool in conservation and crop development efforts. A postdoctoral researcher studying a rare Andean crop conducts detailed pH measurements at multiple field sites to identify suitable growing conditions. These sites represent diverse microclimates, enabling a scientifically sound comparison. The aim is not only to monitor soil chemistry but also to guide future planting decisions supported by empirical data. This approach aligns with emerging trends in agronomy, where data-driven strategies help preserve biodiversity and improve resource efficiency. How pH Measurements Determine Deviation from Optimal
To calculate the average deviation, each site’s pH value is compared to the optimal 6.5. Deviations are measured as absolute differences: the positive or negative distance from the target value. The team subtracts 6.5 from each reading, takes the absolute result, and computes the mean of these values. This method reveals how far each location falls short—or exceeds—the ideal range. Neutral science relies on averages to smooth out site-specific variances, giving a clearer picture of overall conditions across the test area. Understanding Deviation Through Key Subtractions
- Site 1 (6.2): |6.2 – 6.5| = 0.3
- Site 2 (6.6): |6.6 – 6.5| = 0.1
- Site 3 (5.9): |5.9 – 6.5| = 0.6
- Site 4 (7.1): |7.1 – 6.5| = 0.6
- Site 5 (6.4): |6.4 – 6.5| = 0.1