作物生产

• Precision agriculture ( pa ) is a very important direction for agriculture development in 21st century . pa will promote the change from extensive agriculture to knowledge and technology - based agriculture . in developed countries , pa is considered as a revolution of crop production and management at the threshold of the new millennium
  精细农业是21世纪农业发展的一个重要方向，将推动粗放型农业向知识型、技术型的现代农业转变，在发达国家已被认为是跨世纪作物生产管理的一场革命。