Table 5. List of commonly used organic manure for carp (rohu) culture and their calcium and NPK content
Type of fertilizers		N:P ratio and Ca and NPK content (%)
		N:P ratio	Nitrogen	Phosphorus	Potassium
FAECES/DUNG
	Cattle	3.41	1.91	0.56	1.40
	Poultry manure	1.99	3.77	1.89	1.76
	Pig	2.06	2.8	1.36	1.18
	Duck manure	1.9	2.15	1.13	1.15
	Buffalo	2.24	1.23	0.55	0.69
URINE
	Cattle	194.8	9.74	0.05	7.78
	Buffalo	205	2.05	0.01	3.78
	Pig	8.7	10.88	1.25	17.86
AQUATIC PLANTS�
	Water fern (Azolla sp.)	18.4	3.68	0.2	0.15
	Water hyacinth	5.51	2.04	0.37	3.40
	Hydrilla sp.	9.64	2.7	0.28	2.90
	Duckweed (Lemna sp.)	16.55	3.31	0.2	0.69
OILCAKES
	Groundnut�		7.29	1.53	1.33
	Mustard		4.65	1.65	1.56
	Mahua		2.51	0.08	1.85
	Neem�		5.22	1.08	1.48
	Cotton seed�
	undecorticated		3.99	1.89	1.6
	decorticated		6.41	2.89	2.17
	Coconut�		3.02	1.9	1.77
	Sunflower�
	undecorticated		4.92	1.44	1.23
	decorticated		7.88	2.2	1.92
	Soybean		5.48	0.6	0.99
ANIMAL/PLANT (MIXED) MANURES
	Rice straw bedding	3.93	1.06	0.27	2
	Wheat straw bedding	6.41	1.09	0.17	1.4
	Litter bedding	5.65	1.13	0.2	2.03
	Straw	2.95	0.62	0.21	0.49
	Farmyard manure		0.4	0.3
	Compost	3.79	1.1	0.29	1.37
RAW MATERIAL
	Straw	6.89	1.31	0.19	7.81
	Cow manure	3.7	0.37	0.1	0.08
	Buffalo manure	3.14	0.44	0.14	0.11
	Pig manure	5.23	0.68	0.13	0.05
	Water hyacinth	3.04	1.4	0.46	0.54
	Cotton stalks	7.67	1.61	0.21	2.8
	Mixed crop residues	4.55	0.91	0.2	1.62
	Rice straw	4	1.04	0.26	0.85
	Azolla	3.53	3.88	1.1	1.6
Data source: Tacon (1987); Jhingran (1991)