Agricultural systems.

An Introduction to agricultural systems by: (Language materials, printed)

The global food crisis[electronic resource] :governance challenges and opportunities / by: (Language materials, printed)

Ecological management of agricultural weeds / by: (Language materials, printed)

Agricultural systems.

Food supply

Food relief

Food prices

Crops and climate

Sustainable agriculture.

Agricultural systems.

Weeds

Agricultural ecology.

Tillage.

Agricultural systems.