AGRICOLA - Agriculture This link opens in a new windowOpen access catalog from US National Agricultural Library (NAL), which searches all content in the NAL library: peer-reviewed journals, books, theses, technical reports, patents, software, and audiovisual materials. Subject coverage includes all core topics of the agricultural sciences: plant sciences, animal and veterinary sciences, entomology, forestry, aquaculture, environmental sciences, natural resources, sustainable agriculture, agricultural economics and policy, nutrition, and related research.