Table 5. List of commonly used organic manures used in mrigal/carp culture and their average elemental
Type of fertilizers	C:N ratio	Nitrogen (N)	Phosphorus (P)	Potassium (K)
FAECES/DUNG
Buffalo	19	1.23	0.55	0.69
Cattle	19	1.91	0.56	1.4
Sheep	29	1.87	0.79	0.92
Pig	13	2.8	1.36	1.18
Poultry	9	3.77	1.89	1.76
Duck	10	2.15	1.13	1.15
URINE
Buffalo		2.05	0.01	3.78
Cattle		9.74	0.05	7.78
Sheep		9.9	0.1	12.31
Pig		10.88	1.25	17.86
PLANT MANURES
Wheat straw	105	0.49	0.11	1.06
Rice straw	105	0.58	0.1	1.38
Maize straw	55	0.59	0.31	1.31
Soybean straw	32	1.3
Cotton stalks and leaves		0.88	0.15	1.45
Cottonseed meal		7.05	0.9	1.16
Groundnut straw	19	0.59
Groundnut hulls		1.75	0.2	1.24
Bean straw		1.57	0.32	1.34
Sugarcane trash	116	0.35	0.04	0.5
Grass	20	0.41	0.03	0.26
Green weeds	13	2.45
Groundnut leaves		2.56	0.17	2.11
Tree leaves (general)
AQUATIC PLANTS�
Water hyacinth	18	2.04	0.37	3.4
Water fern (Azolla sp.)		3.68	0.2	0.15
Duckweed (Lemna sp.)		3.31	0.2	0.69
Hornwort (Ceratophyllum)		3.3	0.47	5.9
Hydrilla		2.7	0.28	2.9
OILSEED CAKES
Mustard		4.93	0.53	0.65
Sesame		6.12	0.92	1.04
Linseed		5.48	0.6	0.99
Soybean		6.95	2.88	1.02
Cotton seed
ANIMAL/PLANT (MIXED) MANURES
Rice straw bedding		1.06	0.27	2
Wheat straw bedding		1.09	0.17	1.4
Litter bedding		1.13	0.2	2.03
Straw		0.62	0.21	0.49
Rural compost (general)		1.1	0.29	1.37
RAW MATERIAL
Straw		1.31	0.19	7.81
Cow manure		0.37	0.1	0.08
Pig manure		0.68	0.13	0.05
Mixed crop residues		0.91	0.2	1.62
Buffalo manure		0.44	0.14	0.11
Data source: Adapted from Tacon (1987)