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. 2019 Jul 29;9:10954. doi: 10.1038/s41598-019-47554-1

Table 5.

Bulk density and chemical properties of the 0–20 cm and 20–40 cm soil layers sampled from the experimental field at planting and before fertilizer application in 2012, 2013, and 2014.

Year Layer (cm) Bulk density (g cm−3) Organic C Total N Mineral N (kg ha−1) Available K Available P pH
(Mg ha−1) NO3-N NH4-N (kg ha−1) (kg ha−1)
2012 0–20 1.48 31 2.4 46 14.5 527 93 7.4
20–40 1.36 26 2.2 41 13.2 349 77 7.7
2013 0–20 1.43 30 2.6 46 13.6 524 77 7.4
20–40 1.40 28 2.2 40 12.9 407 60 7.7
2014 0–20 1.41 29 2.2 43 12.7 506 74 7.4
20–40 1.57 28 2.1 41 12.2 379 67 7.7