Los bosques y los árboles respaldan la agricultura sostenible. Estabilizan los suelos y el clima, regulan los flujos de agua, ofrecen sombra y refugio y proporcionan un hábitat a los polinizadores y los depredadores naturales de plagas agrícolas. Asimismo, contribuyen a la seguridad alimentaria de cientos de millones de personas, para quienes constituyen fuentes importantes de alimentos, energía e ingresos. Sin embargo, la agricultura sigue siendo el principal factor de la deforestación a nivel mundial y, a menudo, las políticas agrícolas, forestales y de tierras no casan.

森林和树木为农业可持续发展提供支持。森林和树木固定土壤、稳定气候，调解水流，提供荫蔽和居所，为传粉昆虫和动物以及农业有害生物天敌提供栖息地。森林和树木还为亿万民众的粮食安全做出贡献，为其提供食物、能源和收入。然而，农业依然是全球毁林的主要驱动因素；同时，农业、林业和土地政策往往存在分歧。

《世界森林状况2016》发现，在提升农业生产力和粮食安全的同时，我们可以做到遏制甚至扭转毁林趋势，其中特别突出介绍了哥斯达黎加、智利、冈比亚、格鲁吉亚、加纳、突尼斯和越南的情况。土地利用综合规划是平衡各项土地用途的关键，同时以正确的政策手段为基础，促进可持续森林和农业发展。

Read the http://www.fao.org/3/a-i5588c.pdf ">世界森林状况 2016

http://www.fao.org/3/a-i5852c.pdf ">宣传单

El Mecanismo para bosques y fincas (FFF, por sus siglas en inglés) es una asociación entre la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO), el Instituto Internacional de Medio Ambiente y Desarrollo (IIED, por sus siglas en inglés), la Unión Internacional para la Conservación de la Naturaleza (UICN), y AgriCord que actualmente recibe financiamiento de Suecia, Finlandia, Alemania, Estados Unidos de América y AgriCord, a través del programa “Agricultores en lucha contra la pobreza”.

Solution of ecological problems is an urgent and extremely important task at the present stage of social economic development of Ukraine. Unreasonably high degree of economic (mostly agricultural) reclaiming of area causes spreading and intensification of degradation processes in ecosystems. Conservation of lands, including the one carried out by means of foresting of degraded lands, is the principal way to renature environment. The article concerns an issue of land conservation in the context of ecosystem services of forests.

The article presents the Lithuanian forest land change in the period of more than a hundred years. The causes leading to forest land use change are analysed in the article. The beginning of forestry in Lithuania can be traced back to Sigismund Augustus times starting from 1557, when Wallach reform was launched. However, over time forest land and its use evolved for a variety of political, social and economic factors. In 1795 the state-owned forests in Lithuania amounted to 35% of the total area of forests; other forests were owned by landlords, churches and kulak farms.

Recent research on payments for environmental services (PES) has observed that high transaction costs (TCs) are incurred through the implementation of PES schemes and farmer participation. TCs incurred by households are considered to be an obstacle to the participation in and efficiency of PES policies. This study aims to understand transactions related to previous forest plantation programmes and to estimate the actual TCs incurred by farmers who participated in these programmes in a mountainous area of northwestern Vietnam.

Agricultural landscapes presently cover about 46 % of earth terrestrial surface. This cultivated area is decreasing, whereas the global food demand is projected to increase up to 70 % in 2050. The intensification of agriculture is not a solution to this food issue because intensive agriculture has often resulted in pollution and loss of biodiversity. On the other hand, mechanistic models with optimization algorithms can be used to design alternative land uses for sustainable agriculture.