Organic Waste Recycling

392 Organic waste reuse and recycling: technology and management

Remarks Very careful land grading necessary Minimum of labour required for irrigation Little interference with use of farm machinery Best suited for crops that cannot be flooded. High irrigation efficiency possible. Well adapted to mechanized farming. Rodent control is essential. Erosion hazard from heavy rains or water breaking out of furrows. High labour requirements for irrigation.

Soils Deep soils of medium to fine texture Can be used on all soils if length of furrows is adjusted to type of soil. Soils of medium to fine texture that do not crack during drying

Water quantity Large flows up to 20 ft

3 /s

Flows up to 12 ft

3 /s

Flows up to 3 ft

3 /s

Topography Land graded to uniform plane with maximum slope less than 0.5% Uniform slopes not exceeding 2 % for cultivated crops Undulating land with slopes up to 8%

Suitabilities and conditions of use Crops Grains, alfalfa, orchards Vegetables, row crops, orchards, vineyards Vegetables, field crops, orchards, vineyards

Table 8.5 Surface irrigation methods andIrrigation methods Wide borders up to 100 ft wide Furrows Straight furrow Graded contour furrows

conditions of use (continued)