This website from IDE provides practical and technical information related to drip irrigation.

Drip irrigation delivers water directly to the plant through a system of plastic tubes with minimal water loss. Drip systems are often associated with the capital-intensive, commercial farms of more wealthy farmers. The systems used on large farms, however, are unaffordable for smallholders and are not available in sizes suitable for small plots. Beginning in 1995, IDE developed a variety of low-cost drip irrigation kits that are appropriately sized and affordable for smallholders. The kits, operating under as little as 1 to 2 m of water pressure, are typically used in the production of fruit and vegetable crops but have also been used for maize, wheat, and cotton.