Water and Soil

Water

For being sustainable, we need to have a good management for irrigation in areas with no sufficient rainfall to avoid salinization. we should use drip irrigation or low pressure pivots and manage to improve water conservation and also reduce water loss from crops. 

Soil

Soil erosion is one of the greatest problems in the world. Scientists estimate that crop yields will be reduced in half within thirty to fifty years if erosion continues at present rates. there are some technics which can stop or at least reduce soil erosion:
1- No-till farming, or minimum tillage
2- planting wind break
3- Intercropping (with legumes)
4- Stop using chemicals