Zero Tillage is the main element among several that make up what FAO terms Conservation Agriculture (CA). Although CA uses some specific practices, and may also use external inputs, it is in essence an agricultural concept that conserves and enhances soil fertility, improves the availability of soil moisture, and increases the soil's biological resources. The adoption of CA leads to conservation of the environment and to a reversal of the soil degradation processes so common worldwide. At the same time, experience shows that it increases crop yields but with lower production costs, mainly due to reduced labour inputs, which frees time for other productive or income-generating activities. In effect, the system brings high agricultural productivity combined with the sustainable use of natural resources, and FAO is therefore promoting it vigorously.