Table (13): Ranges of maximum effective rooting depth for common crops* Maximum Root Depth (m) Crop Vegetables Solanum Family (Solanaceae) – 0.7 1.2 Egg – 0.5 1.0 Sweet Peppers (bell) – Tomato 0.7 1.5 – Vegetables Cucumber Family (Cucurbitaceae) – Maximum Root Depth (m) Crop Cantaloupe 0.9 1.5 – 0.7 1.2 Cucumber:Fresh Market – 0.7 1.2 Cucumber:Machine harvest – 1.0 1.5 Pumpkin, Winter Squash – 0.8 1.5 Sweet Melons – Small Vegetables Maximum Root Depth (m) Crop Broccoli 0.4 0.6 – 0.4 0.6 Brussel sprouts – 0.5 0.8 Cabbage – 0.5 1.0 Carrots – 0.4 0.7 Cauliflower – 0.3 0.5 Celery – 0.3 0.5 Garlic – 0.3 0.5 Lettuce – 0.3 0.6 Onions dry – – Tropical Fruits and Trees Maximum Root Depth (Zr, m) Crop 0.5 0.9 Banana 1st year – – 0.5 0.9 Banana 2st year – – 1.2 1.5 Citrus 70% canopy – – 1.1 1.5 Citrus 50% canopy – – 0.8 1.1 Citrus 20% canopy – – 0.5 1.0 Avocado – 1.0 2.0 Apples, Charries, Pears – * (Source: FAO,1998) Table (14): RAW and Available Water (AW) values for different soil textures (Ramsey, 2007) Water To -20 kPa* To -40 kPa To -60 kPa To -100 kPa To -150 kPa Tension A B C D E Soft crops such Most fruit Lucerne, most Annual Available as vegetables crops and pasture, pastures and Water (AW) is
Table (13): Ranges of maximum effective rooting depth for common crops* Maximum Root Depth (m) Crop Vegetables – Solanum Family (Solanaceae) 0.7 – 1.2 Egg 0.5 – 1.0 Sweet Peppers (bell) 0.7 – 1.5 Tomato Vegetables – Cucumber Family (Cucurbitaceae) Maximum Root Depth (m) Crop 0.9 – 1.5 Cantaloupe 0.7 – 1.2 Cucumber:Fresh Market 0.7 – 1.2 Cucumber:Machine harvest 1.0 – 1.5 Pumpkin, Winter Squash 0.8 – 1.5 Sweet Melons Small Vegetables Maximum Root Depth (m) Crop 0.4 – 0.6 Broccoli 0.4 – 0.6 Brussel sprouts 0.5 – 0.8 Cabbage 0.5 – 1.0 Carrots 0.4 – 0.7 Cauliflower 0.3 – 0.5 Celery 0.3 – 0.5 Garlic 0.3 – 0.5 Lettuce 0.3 – 0.6 Onions – dry Tropical Fruits and Trees Maximum Root Depth (Zr, m) Crop 0.5 – 0.9 Banana – 1st year 0.5 – 0.9 Banana – 2st year 1.2 – 1.5 Citrus – 70% canopy 1.1 – 1.5 Citrus – 50% canopy 0.8 – 1.1 Citrus – 20% canopy 0.5 – 1.0 Avocado 1.0 – 2.0 Apples, Charries, Pears * (Source: FAO,1998) Table (14): RAW and Available Water (AW) values for different soil textures (Ramsey, 2007) Water Tension To -20 kPa* To -40 kPa To -60 kPa To -100 kPa To -150 kPa A B C D E Soft crops such as vegetables Most fruit crops and Lucerne, most pasture, Annual pastures and Available Water (AW) is
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