Related by context. Frequent words. (Click for all words.) 63 humid tropical 61 subtropical regions 61 temperate forests 60 temperate zones 59 drylands 58 tropical climates 58 temperate regions 57 tropics 56 lowland forests 56 acidic soils 56 arid regions 55 biodiversity hotspots 55 biodiverse 55 cerrado 55 semi arid 54 subtropical climate 54 deciduous forests 54 temperate climates 54 evergreen forests 53 tropical 53 tropical rainforests 53 equatorial 53 biodiversity hotspot 53 savannahs 53 deciduous forest 53 biome 52 arid 52 tropical jungles 52 rainfed 52 temperate climate 52 isoprene 52 temperate 52 tropical forest 52 pearl millet 52 nitrogen fixing 51 subtropical 51 semi arid regions 51 arid lands 51 aridity 51 agroforestry 51 savanna 51 insolation 51 tropical rainforest 51 subtropics 51 fertile soils 51 Drip irrigation 51 drained soils 51 tropical forests 50 monocultures 50 softwoods 50 El Niños 50 deforested 50 micro climates 50 shade tolerant 49 colder winters 49 warmer drier 49 climatic conditions 49 drier summers 49 rainforest 49 terrestrial ecosystems 49 self pollinating 49 harsh climates 49 forests 49 Amazonian rainforest 49 Cerrado 48 climatically 48 Anopheles 48 frequent droughts 48 savannas 48 driest continent 48 semiarid 48 lush rainforest 48 solar irradiance 48 Amazon basin 48 degrees Fahrenheit warmer 48 alkaline soil 48 sugar cane plantations 48 Namib Desert 48 reforested 48 kg ha 48 cold climates 48 eucalypts 48 Switchgrass 48 tropic 48 arid desert 48 savannah 48 loblolly pine 48 parching 48 deciduous tree 47 forbs 47 Miscanthus 47 biomes 47 lowlands 47 latitudinal 47 virgin forests 47 Temperate 47 drought tolerant 47 Polar Regions 47 deforestation 47 landmass 47 boreal forests