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Fertilizer Recommendation Tables - 2008 Revision

Author: Keith Reid - Soil Fertility Specialist/OMAFRA
Creation Date: October 2007
Last Reviewed: November 2008

2008 Revision

Nitrogen Requirements for Vegetables on Mineral Soils

 

Crops

N Required
kg N/ha
Potatoes - expected marketable yield 15 t/ha Main Crop

50 kg N/ha
Potatoes - expected marketable yield 20 t/ha

75 kg N/ha
Potatoes - expected marketable yield 25 t/ha

130 kg N/ha
Potatoes - expected marketable yield 30+ t/ha

200 kg N/ha
Potatoes - early crop 70 kg N/ha

Garden - no print-out, adjust depending on species

60 kg N/ha

Snap beans, lima beans, peas - with P2O5 and K2O

15 kg N/ha

Snap beans, lima beans, pears - where no P2O5 or K2O is required

0 kg N/ha
Tomato* - no print-out; to be recommended by specialist.  
Fresh Market Tomatoes: -apply 35-50 kg N/ha preplant broadcast, and sidedress at first fruit set with 35-50 kg N/ha. 70-100 kg N/ha
Processing Tomatoes: - apply N as preplant broadcast. -open pollinated varieties: 70-90 kg N/ha(with >2% soil organic matter), 100-120 kgN/ha(<2% organic matter). -hybrid varieties: 90-120 kg N/ha(>2% organic matter), 160-180 kg N/ha(<2% organic matter). 70-180 kg N/ha

Fertigated Processing Tomatoes: - Coarse textured soils with <3.2% OM, apply up to 300 kg N/ha, with 40% applied pre-plant and the balance through the drip line. All other soils, apply up to 80 kg N/ha, with 60% applied preplant and the balance through the drip line.

80-300 kg N/ha

Cucumber, muskmelon, watermelon, pumpkin, squash

110 kg N/ha

Broccoli, brussels sprout, cauliflower**

130 kg N/ha

Cabbage**

170 kg N/ha

Peppers*, eggplant*

70 kg N/ha

Rutabagas and turnips

35 kg N/ha

Celery

195 kg N/ha

Rhubarb

280 kg N/ha

Beet, onion, spinach, lettuce, endive, garlic, chives, carrots, horseradish, parsnip

110 kg N/ha

Sugarbeet*** - following Grain Corn

120-150 kg N/ha

Sugarbeet*** - Following Other Crops

100-130 kg N/ha

Radish

60 kg N/ha

Asparagus, nursery - work in before seeding. If rainfall is excessive an additional 50 kg N may be applied in August or early September.

75 kg N/ha
Asparagus - new and established plantings. For new plantings, apply all the N pre-plant. For established plantings, apply half the N in early spring and half after harvest. 110 kg N/ha

Ginseng

40 kg N/ha

*For transplanted tomatoes, peppers and eggplant apply a starter solution high in phosphorus such as 10‑34‑0 at 1 L/100 L or 6‑24‑6 at 1 L/75 L of water at planting. Under high temperatures and on sandy soils use half the concentration of fertilizer but do not reduce the volume of water.

**For transplanted broccoli, brussels sprouts, cabbage and cauliflower, if no insecticide is used in the planting water apply a starter solution high in nitrogen such as 20‑20‑20 at 1 kg/200 L of water. Under high temperatures and in dry sandy soils use half the concentration of fertilizer.

***Excess nitrogen has an adverse effect on sugar content, without increasing tons per acre of sugarbeets.

Approved: Ontario Soil Management Research and Services Committee (June 2008)


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