Agriculture is widely distributed. Almost all the earth's surface can be used for agricultural production except the poles and deserts. In the actual land area of nearly 1.3 1 100 million square kilometers, about 1% is cultivated land and perennial crops, and 24% is grassland and pasture. 365,438+0% is forest and woodland. Marine and inland waters are places for aquaculture production. The distribution of agricultural natural resources is very uneven. Cultivable land is mainly concentrated in Asia, Europe and North America. The economically developed countries in North America, Europe and Oceania are 0.56 hectares, while the developing countries in Asia, Africa and Latin America are only 0.22 hectares, of which Asia is only 0. 16 hectares (65,438 hectares). The grassland area in Africa ranks first, followed by Asia; Among them, there are also great differences between different countries and regions. The basic trends and characteristics of agricultural development in the contemporary world are high commercialization, capitalization, scale, specialization, regionalization, factory, knowledge, socialization and internationalization, which greatly improve the land output rate, agricultural labor productivity, commodity rate of agricultural products and competitiveness in the international market.