Fertilizer Recommendation Tables - 2007 Revision

Nitrogen Requirements for Vegetables on Organic Soils

Cauliflower, broccoli and brussels sprouts - no print-out of N requirement; N to be recommended by specialist. Suggested maximum 130 kg N/ha with 70 kg/ha pre-plant and possible two sidedressings of 30 kg N/ha if required.

Cabbage - no print-out of N requirements; N to be recommended by specialist. Suggested maximum 100 kg N/ha -all pre-plant.

Potatoes - no print-out of N requirement; N to be recommended by specialist; suggested maximum 60 kg/ha.

Carrots - no N is required for carrots grown on established muck soils.

Parsnips - no print-out of N requirements. N to be recommended by specialist; suggested maximum 60 kg N/ha - all pre-plant.

Onions and garlic - no print-out of N requirements; N to be recommended by a specialist; suggested maximum 120 kg N/ha with 90 kg pre-plant and one sidedressing of 30 kg N/ha when plants are 8-10 cm high if rainfall has been above normal and soil temperatures below normal.

Lettuce and Endive - no print-out of N requirement; N to be recommended by specialist; suggested maximum 120 kg N/ha for early plantings, maximum 100 kg N/ha for mid season or late plantings - all pre-plant.

Spinach, radish, beet - no print-out of N requirement: N to be recommended by a specialist; suggested maximum 40 kg N/ha for radish and beet, 75 kg N/ha for spinach.

Celery - no print-out of N requirement; N to be recommended by a specialist; suggested maximum 160 kg/ha with 70 to 80 kg/ha pre-plant and remainder applied in 2 to 3 sidedressing of 40 kg/ha as required.

The fertilizer rates in this table are designed to produce highest economic yields when accompanied by good or above average management.

Approved: Ontario Soil Management Research and Services Committee (June 2007)