Model: Trimble-Spectra (USA)
* Working principle: Levelling land
using lazer control
* Differences in heights before and after
levelling (cm): 50-100 to 3
* Working width of levelling bucket
(cm): 180-240
* Levelling capacity (h/ha): 4-20
* Required power: 4-wheel tractor of 50 HP
* Benefits: reductions in use of water (50%),
fertilizer, seed (25%), weeding labor (70%)
& crop lodging and increases in land area (5-7%),
crop yield (25%) & environmental protection
* Applying locations: Provinces of An Giang,
Thua Thien-Hue & Ba Ria-Vung Tau
* Other land leveller: Leica Rugby (Switzerland)