Table 5 Nitrogen, phosphorus, magnesium and pH of Eragrostis curvula Ermelo and Agpal post-harvest soils collected from Jameson park, kaydale, and rensburg, heidelberg, gauteng. Values represent mean ± se, different letters denote statistical differences after a two-way ANOVA test.

Jameson Park

Nitrogen (mg/kg)

Ermelo

5.00 ± 0.17^a

2017.33 ± 48.60^b

1105.33 ± 167.44^c

1177.33 ± 287.46^c

2033.00 ± 36.37^d

Agpal

1596 ± 112.65^b

1145 ± 134.89^c

1488.67 ± 95.04^d

2158.32 ± 140.58^e

Phosphorus (mg/kg)

Ermelo

16.67 ± 0.58^a

13.97 ± 1.05^a

15.03 ± 3.15^a

8.59 ± 2.42^b

9.40 ± 2.42^b

Agpal

15.00 ± 2.65^a

16.43 ± 4.17^a

12.83 ± 3.45^a

13.76 ± 1.76^a

Magnesium (mg/kg)

Ermelo

120.00 ± 6.08^a

306.00 ± 5.57^b

213.63 ± 15.06^c

111.00 ± 10.54^d

127.13 ± 1.86^d

Agpal

308.73 ± 9.72^b

267.60 ± 18.40^c

295.70 ± 4.56^c

329.67 ± 2.08^d

pH

Ermelo

4.72 ± 0.04^a

5.01 ± 0.02^a

6.01 ± 0.04^b

5.89 ± 0.35^b

5.73 ± 0.06^b

Agpal

5.26 ± 0.13^a

6.06 ± 0.30^b

5.18 ± 0.12^c

5.02 ± 0.07^c

Kaydale

Nitrogen (mg/kg)

Ermelo

4.30 ± 0.30^a

735 ± 24.27^b

924.00 ± 40.45^b

1437.33 ± 186.95^c

1023.67 ± 81.00^d

Agpal

837.30 ± 32.40^b

1238 ± 256.38^c

720.47 ± 17.56^c

993.67 ± 58.43^d

Phosphorus (mg/kg)

Ermelo

16.67 ± 2.08^a

4.90 ± 1.15^b

8.97 ± 2.40^b

12.25 ± 2.63^c

6.37 ± 1.08^d

Agpal

7.67 ± 3.74^b

10.02 ± 0.05^c

4.97 ± 1.25^d

5.27 ± 0.83^d

Magnesium (mg/kg)

Ermelo

216.67 ± 18.50^a

191.33 ± 8.50^b

257.33 ± 23.03^c

286.67 ± 10.50^c

210.70 ± 10.45^d

Agpal

196.00 ± 12.53^ch

224.09 ± 7.23^ch

175.45 ± 11.24^ci

195.02 ± 0.05^ci

pH

Ermelo

4.88 ± 0.01^a

4.82 ± 0.07^a

5.46 ± 0.03^b

5.19 ± 0.10^b

5.44 ± 0.06^b

Agpal

4.98 ± 0.07^a

5.40 ± 0.08^b

4.93 ± 0.06^c

5.02 ± 0.10^c

Rensburg

Nitrogen (mg/kg)

Ermelo

11.77 ± 0.58^a

563.67 ± 62.16^b

984.67 ± 33.50^c

763 ± 65.60^d

1404.33 ± 188.70^e

Agpal

659.71 ± 47.29^b

870.43 ± 44.21^c

675.30 ± 22.50^d

746.73 ± 20.18^d

Phosphorus (mg/kg)

Ermelo

18.33 ± 0.58^a

12.03 ± 3.75^a

15.93 ± 2.44^a

11.53 ± 0.57^b

13.43 ± 2.68^a

Agpal

13.40 ± 3.82^a

15.87 ± 4.46^a

10.16 ± 1.40^b

3.50 ± 0.95^c

Magnesium (mg/kg)

Ermelo

432.67 ± 6.03^a

175.67 ± 12.22^b

224.50 ± 11.17^c

154.00 ± 23.52^d

337.30 ± 23.07^e

Agpal

177.00 ± 23.07^b

221.92 ± 4.31^c

160.58 ± 0.71^d

173.58 ± 0.71^d

pH

Ermelo

5.06 ± 0.02^a

5.03 ± 0.19^a

5.60 ± 0.06^b

5.42 ± 0.16^b

5.41 ± 0.36^b

Agpal

5.73 ± 0.23^b

5.62 ± 0.07^b

5.24 ± 0.21^c

4.94 ± 0.05^c