Chemical Attributes of Soil Fertilized with Cassava Mill Wastewater and Cultivated with Sunflower

Table 3

Analysis of variance of the chemical attributes of dystrophic red-yellow latosol (oxisol) fertilized with cassava wastewater after sunflower crop.

Source of variation	Degrees of freedom	Mean square
		P	K	Ca	Mg	Na	ECse	pH
Block	3	49.60^ns	0.03^ns	0.28^ns	0.67^ns	0.13^*	0.47^ns	0.17^*
Dose ()	5	22.89^ns	1.76^**	0.76^*	5.98^**	0.27^**	0.97^**	0.16^*
Sampling ()	4	45.09^**	0.83^**	0.87^**	4.50^**	4.39^**	1.57^**	0.26^**
×	20	6.39^ns	0.05^ns	0.09^ns	6.94^**	0.17^**	0.08^ns	0.10^**
CV 1 (%)		53.8	33.65	17.55	21.58	29.81	33.65	3.01
CV 2 (%)		32.8	32.77	13.82	23.32	36.80	31.12	2.63
Overall mean		7.93	0.57	2.63	2.45	0.67	1.24	7.38

nonsignificant, ^*significant at 5%, and ^**significant at 1% by test. P: available phosphorus; K: exchangeable potassium; Ca: exchangeable calcium; Mg: exchangeable magnesium; Na: exchangeable sodium; ECse: electric conductivity of the soil saturation extract.