Production gains are attributed to improved crop varieties and livestock, soil management, improved access to resources (nutrients and water), infrastructure developments, policy initiatives, microfinance, education, better communication and advances in market and trade systems. This has also increased the demand and use of irrigation, phosphorus and nitrogen.
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From collection: IAASTD - International assessment of agricultural science and technology for development
IAASTD/Ketill Berger, UNEP/GRID-Arendal