a. drainage Mole
Drainage mole rat hole commonly referred to as a channel round construction without protected at all, the manufacturing without having to dig the ground, simply by pulling with a tractor round steel formations called mole mounted on a tool such as the plow layer of subsoil at shallow depths. On the back of the mole usually included expander tool that is useful to enlarge and strengthen the hole shape.
Based on the drainage reservoirs are divided into two, namely the singular and composite.
– Singular
Consists of a pipe-line lateral planted below the soil surface with a certain distance, the water coming out of the entire lateral pipe accommodated in open channel, then routed to the main drainage channels.
Figure 21. Drainage Systems Singular
– Composites
Consists of a range of lateral pipes are planted below the soil surface with a certain distance, the water from the entire pipeline lateral pipe accommodated in a container which was also planted in the ground, between the lateral pipe with a pipe connected to the container sambuangan, then routed to the main drainage channels.
Figure 22. Composite Drainage Systems
b. Based system, drainse in divided into four, namely:
– Random system
This system is used on undulating land or on land where the soil conditions consist of various types of soil and the land areas are inundated area. The drainage system is random, the basin is connected to the water collecting ducts and water released from the land through a discharge channel (Figure 8.5). These systems are often applied in fields that do not require intensive agricultural operations, such as grasslands, or where farm mechanization equipment mainly small and simple equipment can be applied.
Figure 23. Diagram random network system
Figure 24. Random Drainage Systems
Land leveling is shaping the land surface to the predetermined altitude, so that each row or the slope of the land surface can remove the water from the land. Compared with beds, leveling of land reduces the amount of field drains, thus reducing the need for weed control and maintenance. Leveling of land also meant to raise more land available for cultivation.
Figure 25. Alignment of Land