Teaching Organic Farming and Gardening

Irrigation

Unit 1.5 | 7
Instructor’s Lecture Outline

3. Stage of development and crop natural history

a) “Water-loving” crops (e.g., celery)

b) Drought tolerant crops (e.g., tomato varieties, winter squash varieties, Amaranth, etc.)

c) Maturation period (e.g., onions and garlic)

H. Environmental Factors Influencing the Type of Irrigation Used

1. Climate and incidence of disease

a. Drip-irrigated crops

b. Overhead-irrigated crops

I. Irrigation Delivery Systems

1. Sprinklers

a) Micro-sprinklers

i. Cost

ii. Efficiency

iii. Application uniformity

iv. Design considerations and infrastructure requirements

b) Hand-moved aluminum pipe with impact heads

i. Cost

ii. Efficiency

iii. Application uniformity

iv. Design considerations and infrastructure requirements

2. Drip irrigation

a) In-line emitters

b) T-tape

c) Header design

d) Management

i. Filtration

ii. Pressure regulation

iii. Flushing

iv. Fertigation