1. Development of Combined Peanut Planter
Gong Linong
Qingdao Agricultural University
Qingdao , China

2. 1 Operation items Leveling and compacting soil Furrowing
The combined machine has to complete many operations simultaneously to meet the agricultural technique
The operation items include the following:
Leveling and compacting soil
Furrowing
Fill water in the furrows
Place seed
Covering soil to enhance seed/soil contact
Spraying pesticide
Laying plastic film
Covering soil on the film right above the seed row

3. 2 The combined peanut planter

4. 2.1 Leveling and compacting soil
A roller was fixed in the front of the machine. The width of the roller is as same as that of covered plastic film .
It can break small soil block and level plot. At the same time it drives the seeds metering device.
It can support the machine and control the depth of the soil interacting tools.

5. 2.2 Spraying herbicide
After sowing seed and before laying plastic film it is necessary to spread herbicide on the plot.
The electronic controlled super- little spreading device was fixed in the middle of the machine
The herbicide box was mounted on the tractor.
The switch is controlled by tractor driver.

6. 2.3 Laying plastic film
The device of laying plastic film is consisted of plastic film dispenser, disc digger and film pressing wheel etc.

7. 2.4 Spreading Soil Device
It is necessary to spread the loose soil dense enough to prevent light but thick enough to enable the plumul to prick through the film without pushing it up.
Tow soil –transmitting discs are used in spreading the loose soil on the top of the plastic film .
Tow boards and a roller make up of soil positioner

8. 3 Planting pattern
loose soil as ridge
plastic film (700mm)
800mm
seed

9. 4 Conclusion
(1) The new planting peanut technology can increase the peanut yield about 20% and save the seed used approximately 25% than traditional planting methods. The combined machine developed according to the requirements of the new planting technology can accomplish all the working procedure.

10. (2) A soil ridge is built on the film right above the line of sowing row. The ridge is mm high. It is necessary to spread the loose soil dense enough to prevent light but think enough to enable the plumule to prick through the film without pushing it up. Field experiment results showed that labor productivity increased by 30 times and cost of production was reduced by 50%.

11. (3) When the moisture content of the upper 100 mm of the soil is less than 10 percent , the rate of water use during planting should be about 2600 l/ha for a regular growth, hence increasing yield of the crop.

12. (4 )The plastic-film-covered cultivation of sown peanut is beneficial in that it can increase the temperature, protect soil moisture and keep a good physical and chemical condition of the soil.

13. Thanks