Table 1 Soil basic fertility in 2014 and 2015.
From: Construction of a critical nitrogen dilution curve for maize in Southwest China
Years | 2011–2013 | 2014 | 2015 |
|---|---|---|---|
Organic matter (g·kg−1) | 16.60 | 15.75 | 15.30 |
Total N (g·kg−1) | 1.24 | 1.75 | 1.56 |
Total P (g·kg−1) | 0.73 | 0.57 | 0.40 |
Total K (g·kg−1) | 12.54 | 12.61 | 8.25 |
Alkali hydrolysable N (mg·kg−1) | 25.22 | 39.26 | 36.34 |
Olsen-P (mg·kg−1) | 13.54 | 2.55 | 2.27 |
Exchangeable K (mg·kg−1) | 138.75 | 139.33 | 128.50 |
pH | 8.63 | 7.59 | 8.16 |
