effective crop root depths


The table below shows the effective crop root depths for a number of irrigated plants. For coarser textured soils, the larger values should be used and the smaller values for smaller textured soils. They are the total depth in the case of cultivated orchards and for interrow cultivated crops.

TABLE EFFECTIVE CROP ROOT DEPTHS UNDER IRRIGATION


HORTICULTURAL CROPS CM VEGETABLES
CM

Apples

90-122 Asparagus
45-60

Apricots

60-130
Beans
30-45
Bananas
30-60
Beetroot
45-60
Cherries
80-120
Broccoli
45-60

Citrus

60-120
Brussels sprouts
45-60
Grapes
45-90
Cabbages
45-60
Passionfruit
30-45
Carrots
45-60

Peaches

60-120
Cauliflowers
45-60
Peas
60-120
Celery
45-60
Plums
80-120
Cucumbers
45-60
Strawberries
30-45
Lettuce
15-45
FIELD CROPS
Onions 30
Peas 45-60 Parsnips
60-90
Barley
90-105
Potatoes
60-90
Cotton
60-180
Potatoes sweet
60-90
Lucerne
120-180
Pumpkins
90-120
Maize  60-90
Radish
30
Oats
60-120
Rockmelons
45-60

Sorghum

60-90
Spinach
45-60
Sugar cane
45-100
Squash
60-90
Tobacco
60-130
Swedes
60-90
Wheat
80-105
Sweet corn
60-90

Tomatoes

60-122 Turnips 30-60
Water melons
60-90 CROP MODERATE CLIMATE ARID CLIMATE
PASTURE & FODDER CROPS
Bananas
0.80
Lucerne
120-180 Citrus
0.55- 0.65
Millets - fodder 30-60

Cotton

0.65- 0.75
Pastures - annual
30-60

Deciduous orchard

0.70- 0.90
Pastures – perennial
30-60 Grapes
0.70- 0.80
Sorghum almum
90-120 Lucerne - cutting 0.85- 0.90
Sudan grass
90-120 Lucerne - grazing
0.75- 0.75


Maize
0.75- 0.90


Oats, barley and wheat

0.75- 0.80


Pastures - grazing
0.75-0.75


Pastures - hay
0.85-0.90


Potatoes
0.75-0.85


Rice

0.90-1.00


Sorghum
0.75-0.90


Sorghum almum

0.75-0.90


Sudan grass - millets

0.75-0.85


Sugar cane
1.00


Tobacco
0.75-0.90


Tomatoes
0.75-0.90


Vegetables
0.75-0.85