Table 4.04a :Estimation of Nutrient Depletion in major cropping pattern in Bangladesh
Major cropping Pattern	Total	Input (Kg/ha)			Output (Kg/ha)			Balance(Kg/ha)			Approximate
	Yield	N	P	K	N	P	K	N	P	K	Total Depletion
	(Tone/ha/yr)										(Kg/Ha/Yr)
1	2	3	4	5	6	7	8	9	10	11	12
Boro-Fallow-T.Aman	8	248	49	118	324	32	234	-76	+17	-116	175
Boro-T.Aus-T.Aman	11.5	350	60	151	469	57	368	-119	+3	-217	333
Boro-GM-T.Aman	8	285		135	324	32	240	-39	+28	-105	121
Mustard-Boro-T.Aman	9.5	378	73	183	404	95	326	-26	-22	-143	191
Potato-T.Aus-T.Aman	38	386	67	220	430	53	435	-44	+14	-215	245
Potato-Jute-T.Aman	36	380	70	240	385	55	496	-5	+15	-256	246
Mustard-Jute-T.Aman	7.5	340	75	205	430	79	429	-90	-4	-224	318
Wheat-T.Aus-T.Aman	10	335	65	166	420	64	292	-85	+1	-126	210
Wheat-M.bean-T.Aman	8	275	64	190	305	52	284	-30	+12	-94	112
Sugarcane+Potato
intercropping	100	190	55	150	210	60	320	-20	-5	-170	195
Source: Bangladesh Agricultural Research Council (BARC)
Note:
Input : Fertilizer, manure, fixation(BNF), deposition (rain), sedimentation (flood) and irrigation
Output :Harvested product, residues removed, leaching, denitrification, volatilization and erosion