Ngā kaupapa kua tūtohitia
- Economic aspects 7 ngā hua
- Agriculture 5 ngā hua
- Agricultural literature 3 ngā hua
- Environmental aspects 2 ngā hua
- Fisheries 2 ngā hua
- Agricultural productivity 1 ngā hua
- Agriculture and state 1 ngā hua
- Bibliography 1 ngā hua
- Climatic changes 1 ngā hua
- Congresses 1 ngā hua
- Environmental policy 1 ngā hua
- Forest policy 1 ngā hua
- Forestry investment 1 ngā hua
- Government policy 1 ngā hua
- Greenhouse effect, Atmospheric 1 ngā hua
- Greenhouse gases 1 ngā hua
- Sustainable agriculture 1 ngā hua
- Tree farms 1 ngā hua