Table 1.
Site characteristics for each year and location that samples were randomly selected from for chemical analysis. Raw quinoa seed sent for analysis was grown in 2016 and 2017 in western Washington as part of two separate experimental designs (13, 49).
| 2016 | 2017 | |||
|---|---|---|---|---|
| Chimacum | Quilcene | Sequim | Mount Vernon | |
| Elevation (m) | 37.8 | 68 | 31.1 | 7 |
| Average Annual Precipitation (mm) | 711 | 1397 | 432 | 841 |
| Planting Date | April 8, 2016 | April 7, 2016 | May 5, 2016 | May 18, 2017 |
| Soil Type | Gravelly sandy loam | Silty Clay Loam | Silt Loam | Silt Loam |
| pH | 6.1 | 6.9 | 6.5 | 6.6 |
| Phosphorus (mg kg−1) | 124 | 12 | 31 | 7 |
| Potassium (mg kg−1) | 762 | 290 | 114 | 260 |
| Ammonium (mg kg−1) | 1.1 | 5.7 | 4.5 | 1.2 |
| Nitrate (mg kg−1) | 21.5 | 16.6 | 3.8 | 25† |
| Organic Matter (%) | 12.1 | 3.2 | 3.3 | 2.9 |
| Previous Crop | Barley | Vegetable Crops | Pasture | Rye Cover Crop |
Mount Vernon plants were planted in the greenhouse 1 month before being transplanted on the planting date listed.
†
Reported as nitrate + nitrite.