Winter Irrigated Cotton and Summer Irrigated cotton

STCR IPNS Recommendations for Cotton

Soil test crop response based integrated plant nutrition system (STCR - IPNS) recommendation for prescribing fertilizer doses for specified yield targets [ready reckoners are furnished below]

Mixed black calcareous soil (Perianaickenpalayam series) - Cotton Variety

FK 2 O

180

20*

220

*Maintenance dose

Note: PSB - Phosphorus Solubilizing Bacteria FN, FP2O5 and K 2 O - Fertilizer N, P 2 O 5 and K, 2 O in kg ha -1 , respectively T -Yield target in q ha-1 SN, SP and SK - Soil available N, P and K in kg ha -1 , respectively ON, OP and OK - Quantities of N, P and K supplied through organic manure in kg ha -1 , respectively

PSB - Phosphorus Solubilizing Bacteria
FN, FP2O5 and K 2 O - Fertilizer N, P 2 O 5 and K, 2 O in kg ha -1 , respectively
T -Yield target in q ha-1
SN, SP and SK - Soil available N, P and K in kg ha -1 , respectively
ON, OP and OK - Quantities of N, P and K supplied through organic manure in kg ha -1 , respectively

200

240

139

121

Initial soil test values (kg ha -1 )	NPK (kg ha -1 ) + FYM @ 12.5 t ha -1 + Azospirillum @ 2 kg ha -1 + PSB @ 2 kg ha -1
Yield Target - 25 q ha -1	Yield Target -3 0q ha -1
SN	SP	SK	FN	FP 2 O 5	FK 2 O	FN	FP 2 O 5	FK 2 O
180	10	300	54	20*	20*	98	30	33
220	14	380	40*	20*	20*	73	25	20*
260	18	460	40*	20*	20*	48	20*	20*

FN = 8.81 T – 0.62 SN
FP2O5 = 2.53 T – 1.36 SP
FK2O = 4.92 T – 0.25 SK

Initial soil test values (kg ha -1 )	NPK (kg ha -1 ) + FYM @ 12.5 t ha -1 + Azospirillum @ 2 kg ha -1 + PSB @ 2 kg ha -1
Yield Target - 25 q ha -1	Yield Target -3 0q ha -1
SN	SP	SK	FN	FP 2 O 5	FK 2 O	FN	FP 2 O 5	FK 2 O
180	10	200	59	20*	20*	97	32	39
220	14	240	42	20*	20*	80	20*	20*
260	18	280	40*	20*	20*	63	20*	20*

Initial soil test values (kg ha -1 )	NPK (kg ha -1 ) + FYM @ 12.5 t ha -1 + Azospirillum @ 2 kg ha -1 + PSB @ 2 kg ha -1
Yield Target - 25 q ha -1	Yield Target -3 0q ha -1
SN	SP	SK	FN	FP 2 O 5	FK 2 O	FN	FP 2 O 5	FK 2 O
200	14	400	163	91	124	205	113	157
240	18	500	147	82	106	189	104	139
280	22	600	131	73	88	173	95	121

FN = 7.66 T – 0.43 SN – 0.71 ON
FP 2 O 5 = 3.22 T – 3.27 SP – 0.87 OP
FK 2 O = 5.97 T – 0.50 SK – 0.66 OK


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Main Field :: Nutrient Management :: Cotton

Updated on Jan 2023

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FN = 8.51 T – 0.40 SN – 0.73 ON
FP 2 O 5 = 4.41 T – 2.25 SP – 0.75 OP
FK 2 O = 6.59 T – 0.18 SK – 0.66 OK

Mixed black calcareous soil - Perianaickenpalayam series – Cotton under drip fertigation