Lettuce

Table XX. Lettuce Nitrogen Recommendations
Soil Type	Actual N kg/ha
Mineral soils
Preplant broadcast	55
Side-dress	55
Total	110
Muck soils
Preplant broadcast¹	120
¹ Reduce to 100 kg/ha (107 lb/acre) for mid- to late-season plantings.

Test the soil to determine phosphorus and potassium requirements.

Table X, Phosphorus and Potassium Requirements for Lettuce on Mineral Soils
Legend: HR = High Response MR = Medium Response LR = Low Response RR = Rare Response NR = No Response
Phosphorus			Potassium
Sodium Bicarbonate Phosphorus Soil Test (ppm)	Rating	Phosphate (P205) Required kg/ha	Ammonium Acetate Potassium Soil Test (ppm)	Rating	Potash (K2O) Required (kg/ha)
0-3	HR	180	0-15	HR	230
4-5	HR	170	16-30	HR	220
6-7	HR	170	31-45	HR	210
8-9	HR	160	46-60	HR	190
10-12	HR	160	61-80	HR	160
13-15	HR	150	81-100	HR	130
16-20	HR	140	101-120	MR	100
21-25	MR	120	121-150	MR	80
26-30	MR	100	151-180	MR	50
31-40	MR	80	181-210	LR	0
41-50	LR	50	211-250	RR	0
51-60	RR	30	>250	NR	0
61-80	RR	0
80+	NR	0

Table X, Phosphorus and Potassium Requirements for Lettuce on Muck Soils
Legend: HR = High Response MR = Medium Response LR = Low Response RR = Rare Response NR = No Response
Phosphorus			Potassium
Sodium Bicarbonate Phosphorus Soil Test (ppm)	Rating	Phosphate (P205) Required kg/ha	Ammonium Acetate Potassium Soil Test (ppm)	Rating	Potash (K2O) Required (kg/ha)
0-3	HR	100	0-15	HR	100
4-5	HR	100	16-30	HR	100
6-7	HR	100	31-45	HR	90
8-9	HR	100	46-60	HR	80
10-12	MR	90	61-80	MR	60
13-15	MR	90	81-100	MR	40
16-20	MR	80	101-120	MR	30
21-25	MR	70	121-150	MR	20
26-30	MR	60	151-180	MR	20
31-40	LR	50	181-210	LR	0
41-50	LR	30	211-250	RR	0
51-60	LR	20	>250	NR	0
61-80	RR	0
80+	NR	0