Table 7. Suggested fertilization schedule for different types of carp culture ponds
Type of pond/Stocking density	Type of fertilizer	Rate of application	Frequency
Nursery pond
	Organic manure
6.25 million /ha	Cow dung	5,000 to 15,000 kg/ha	In one installment at least 14-15�
for 2 weeks			days before stocking
		Spaced manuring
		10,000 kg/ha	15 days prior to stocking
		5,000 kg/ha	7 days after stocking
		5,500 kg/ha	Immediately after the removal
			of the first crop, when more�
			than one crop is raised
	Mustard oil cake + cow dung +	6:3:1 ratio at 1,000
	poultry manure	ppm for the culture of
		zooplankton for carp spawn
	Inorganic fertilizer
	Nitrogen:Phosphorus	4:1 ratio
	Nitrogen:Phosphorus:	8:4:2 ppm	Weekly
	Potassium
	N:P:K: 18:8:4	500 kg/ha	After liming at 200 kg/ha
	Both
	Mustard oil cake + 6:8:4:N:P:K	On equivalent nutrient
		basis at 12 kg N/ha
Rearing pond
200,000 to 300.000 / ha	Organic manure
	Cow dung	3-7 tonnes/ha/year	In rearing ponds,  50%
	or	or	of the total requirement is applied
Combined density of	Biogas slurry	5.5 - 12 tonnes/ha/year	15-20 days prior to stocking of
4,000 to 10,000 fingerlings	and	and	fry and the remainder in two equal
per ha.	Cow dung	2.5-5 tonnes/ha/year	monthly applications during rearing�
	or	or	period.�
	Biogas slurry	10-30 tonnes/ha/year
	or	or
	Poultry dropping	5-15 tonnes/ha/year
Rearing pond	Inorganic fertilizers
	Urea	108-152 kg/ha/year	Should be applied in equal�
	Calcium ammonium nitrate	200-280 kg/ha/year	monthly applications alternately
	Ammonium sulphate	250-380 kg/ha/year	with organic manure with a
			gap of about a fortnight.
	Single super phosphate	156-312 kg/ha/year	Weekly. The first installment
			is given seven days after
			initial organic manuring.
	Murate of potash	16-32 kg/ha/year	In equal monthly applications
	or
	Sulphate of potash	20-40 kg/ha/year
Stocking pond	Urea	163-326 kg/ha/year	Same as in rearing pond.
	Calcium ammonium nitrate	300-600 kg/ha//year
	Ammonium sulphate	375-750 kg/ha/year
	Single super phosphate	250-468 kg/ha/year	Same as in rearing pond.
	Murate of potash	41-66 kg/ha/year	Same as in rearing pond
	or
	Sulphate of potash	52-83 kg/ha/year