The agricultural holdings generate a very strong impact on the environment and they also have numerous implications for the economic and social life of rural areas. The improvements of the agricultural holdings' economic, ecological and social effects are the main directions which can contribute to initiating or intensifying their sustainability. This paper highlights some possibilities to optimize the use of agricultural resources allocated to a sustainable development, with a special attention for the elements of the natural capital. The presented models can substantiate the agro-technical decisions within the framework of eco- efficiency actions aimed to achieve sustainability at the farming microeconomic level.