Sugarcane Yield Response to Furrow-Applied Organic Amendments on Sand Soils

Table 10

Predicted least squares means, , and significant contrasts for pH and soil-extractable nutrients (in row, 0–15 cm depth) after the plant cane crop at Site 2.

Treatment^a	pH	P	K	Ca	Mg	Si
		g m^−3
(1) Control	6.70	3.3	42	801	79	61
(2) MM (28 m^3 ha^−1)	6.50	10.9	29	1403	119	44
(3) MM (56 m^3 ha^−1)	6.65	7.4	28	1132	97	42
(4) CP (28 m^3 ha^−1)	6.95	6.8	35	930	90	49
(5) CP (56 m^3 ha^−1)	7.24	5.3	41	1499	120	48
	0.004	0.003	0.004	0.157	0.520	0.504
Contrasts
T1 versus T2 and T3	NS	***	***	†	NS	†
T2 versus T3	NS	*	NS	NS	NS	NS
T1 versus T4 and T5	*	*	NS	NS	NS	NS
T4 versus T5	†	NS	NS	†	NS	NS

Significant differences between specified treatments at , 0.05, or 0.001, respectively.
NS: no significant difference at for the specified contrast.
^aMM: mill mud; CP: yard waste compost. All mill mud and compost treatments were applied in the furrow prior to planting.