China is the largest producer of wheat in the world, accounting for about 1/5 of the global production.

The United States is the largest producer of corn in the world, accounting for about 1/3 of the global production.

The United States is the largest producer of soybeans in the world, accounting for about 1/3 of the global production.

China is the largest producer of rice in the world, accounting for about 1/3 of the global production.

China is the largest producer of cotton in the world, accounting for about 1/3 of the global production.

India is the largest producer of milk in the world, accounting for about 1/5 of the global production.

China is the largest producer of meat in the world, accounting for about 1/3 of the global production.

China is the largest producer of eggs in the world, accounting for about 1/3 of the global production.

China is the largest producer of fruits in the world, accounting for about 1/3 of the global production.

China is the largest producer of vegetables in the world, accounting for about 1/3 of the global production.

The United States is the largest exporter of agricultural products in the world, accounting for about 1/5 of the global exports.

China is the largest importer of agricultural products in the world, accounting for about 1/5 of the global imports.

The Netherlands has the highest agricultural productivity in the world, due to its advanced farming techniques and favorable climate.

Niger has the lowest agricultural productivity in the world, due to its harsh climate, poor soil conditions, and lack of access to modern farming techniques.

All of the above are major challenges facing agriculture in developed countries. Climate change is causing more extreme weather events, which can damage crops and livestock. Water scarcity is a growing problem in many parts of the world, and soil degradation is reducing the productivity of agricultural land.