Related by context. Frequent words. (Click for all words.) 64 arid climates 61 arid 61 arid lands 59 arid regions 57 fertile soils 57 semi arid regions 55 semi arid 54 aridity 54 arid desert 53 harsh climates 53 semiarid 53 arable farmland 52 parching 52 Drip irrigation 52 acidic soils 52 humid climates 52 Sweet sorghum 51 sparse vegetation 51 drylands 51 tropical climates 51 temperate forests 51 soil salinity 51 alkaline soils 50 irrigated crops 50 temperate zones 50 drained soils 50 inhospitable environments 50 periodic droughts 50 Irrigated 49 pasture grasses 49 perennial herb 49 volcanic soils 49 coniferous forests 49 climates 48 livestock rearing 48 intensively farmed 48 prolonged droughts 48 hotter drier 48 Spider mites 48 perennial grasses 48 Raised beds 48 eucalyptus plantations 48 parched landscape 48 alkaline soil 48 conifer forests 48 herbicide resistant crops 48 irrigating crops 48 deserts 47 moist soils 47 hydrologic cycle 47 turfgrasses 47 deciduous forests 47 climatically 47 evergreen forests 47 cold hardiness 47 mountain snowpacks 47 biofuel feedstocks 47 temperate climates 47 population densities 47 humid tropical 47 scrublands 46 drought tolerant 46 soils 46 cacao trees 46 streambanks 46 subtropical climate 46 grassy plains 46 savannahs 46 rainfed 46 herbaceous perennials 46 climatic conditions 46 agriculturally 46 thinnings 46 salinization 46 arable crops 46 Jerusalem artichokes 46 subtropical regions 46 driest inhabited continent 46 temperate climate 46 ocotillo 46 saltbush 46 sunny climates 46 parch 46 fertile soil 46 inorganic fertilizers 46 grassy meadows 46 absorbs carbon dioxide 45 irrigated agriculture 45 biofuel feedstock 45 micro climates 45 algal biomass 45 grazing pastures 45 inoculants 45 temperate regions 45 Xeriscaping 45 Switchgrass 45 pasturelands 45 Severe drought 45 temperate rainforest 45 Jatropha curcas 45 cerrado