Skip to main content
. 2019 Oct 30;9:15606. doi: 10.1038/s41598-019-52131-7

Table 1.

Nitrogen leaf content, number of grains per pod, and 1000-grain weight of soybean plants grown in areas previously covered by degraded pasture (post-pasture area) and a soybean crop (post-soybean crop area), in the 2015/2016, 2016/2017, and 2017/2018 crop seasons.

Crop season (S) Number of grains 1000-grain weight N-leaf concentration
pod−1 g g kg−1
Post-pasture area Post-soybean crop area Post-pasture area Post-soybean crop area Post-pasture area Post-soybean crop area
2015/2016 2.12 b 2.24 b 134.2 a 126.9 a 36.9 a 53.1 c
2016/2017 2.76 a 2.45 a 122.5 c 98.1 c 31.3 c 63.6 a
2017/2018 2.07 b 2.43 a 126.7 b 107.2 b 34.1 b 58.4 b
Inoculant dose (I) – doses ha−1
0 2.29 2.48 126.8 112.8 32.1 57.5
4 2.34 2.37 128.0 111.5 33.3 57.7
8 2.28 2.30 129.9 112.3 35.3 59.0
12 2.35 2.39 127.1 109.2 35.7 59.3
Y 2.38ns 2.5 + 0.04x + 0.003x²R² = 0.97** 127.3ns 111.5ns 32.2 + 0.31x R² = 0.84* 57.4 + 0.17x R² = 0.93*
Nitrogen rate (N) – kg ha−1
0 2.35 2.29 132.1 114.1 27.7 57.1
25 2.30 2.47 129.5 109.8 32.1 57.8
50 2.34 2.34 126.6 111.9 35.2 58.3
100 2.27 2.45 123.7 109.1 41.3 60.3
Y 2.31ns 2.38ns 13.1 − 0.018x R² = 0.94* 11.2 − 0.004x R² = 0.60** 28.2 + 0.13x R² = 0.99* 57.1 + 0.03x R² = 0.98*
F
S 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
N 0.5738 0.0530 0.4420 0.2031 0.0000 0.0001
I 0.4206 0.0223 0.0003 0.0073 0.0000 0.0000
S*N 0.0614 0.1072 0.0000 0.0863 0.0441 0.6720
S*I 0.9478 0.5431 0.5681 0.6762 0.0978 0.4921
N*I 0.5320 0.8269 0.6150 0.1953 0.0000 0.0000
S*N*I 0.3969 0.8973 0.4590 0.3069 0.0269 0.8655
CV% 11.4 13.1 8.1 6.8 9.4 3.8

*Significant at 1%, **significant at 5%, ns = not significant. Means of the treatments followed by the same letter do not differ by Tukey’s test at 5% probability a > b (p < 0.05).