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Soybean Agronomic Performance Does Not Change with Gypsum Application in a Cambisol Submitted to Water Restriction in Southern Brazil

Open Journal of Agricultural Research | Vol 1, Issue 1

Table 1. Changes in soil chemical attributes related to soil acidity and organic matter content due to the management of agricultural gypsum and soil water condition in four layers evaluated in a Cambisol.

Soil depth (cm)	Soil chemical properties
pH-H₂O
	----Gypsum----		----Water restriction----
without	with	without	with	Mean
0-10	5.56^ns	5.58	5.51^ns	5.63	5.57 a
10-20	5.02^ns	5.08	5.01^ns	5.09	5.05 b
20-30	4.35^ns	4.37	4.36^ns	4.36	4.36 c
30-40	4.21^ns	4.25	4.25^ns	4.20	4.23 c
Mean	4.79^ns	4.82	4.80^ns	4.80
CV (%)	5.25
H+Al (cmol_c dm^-3)
0-10	6.69^ns	7.27	7.88^ns	6.38	7.13 d
10-20	15.10^ns	12.89	14.65^ns	13.35	14.00 c
20-30	28.40^ns	27.92	28.58^ns	27.81	28.19 b
30-40	34.40^ns	35.88	36.55^ns	33.74	35.14 a
Mean	21.24^ns	20.99	21.91^ns	20.32
CV (%)	19.98
Al (cmol_c dm^-3)
0-10	0.40^ns	0.19	0.25^ns	0.35	0.30 d
10-20	2.20^ns	1.22	1.69^ns	1.80	1.75 c
20-30	5.70^ns	5.76	5.03^ns	5.88	5.45 b
30-40	7.80^ns	7.23	7.35^ns	7.69	7.52 a
Mean	4.06^*	3.45	3.58^ns	3.93
CV (%)	27.84
m% (%)
0-10	2.39^ns	1.20	1.57^ns	2.02	1.79 d
10-20	17.29 A	7.77 B	11.25^ns	13.81	12.53 c
20-30	52.90^ns	47.03	46.36^ns	53.57	49.97 b
30-40	72.50^ns	66.31	65.74^ns	73.12	69.43 a
Mean	36.28^*	30.57	31.23^ns	35.63
CV (%)	24.37
V% (%)
0-10	70.39^ns	6.,25	66.78^ns	72.87	69.82 a
10-20	42.56^ns	53.27	48.93^ns	46.90	47.91 b
20-30	15.10^ns	17.46	17.32^ns	15.25	16.28 c
30-40	7.84^ns	9.70	9.79^ns	7.75	8.77 d
Mean	33.97^ns	33.42	35.70^ns	35.69
CV (%)	18.07
SOM (cmol_c dm^-3)
0-10	5.38^ns	5.22	5.38^ns	5.22	5.30 a
10-20	4.20^ns	4.56	4.35^ns	4.45	4.40 b
20-30	3.00^ns	3.20	3.10^ns	3.10	3.10 c
30-40	2.20^ns	2.58	2.55^ns	2.27	2.41 d
Mean	3.9^ns	3.71	3.85^ns	3.76
CV (%)	10.68

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