| ACROSS | DOWN |
| 1 The arrangement of soil particles, e.g. loose and clumpy | 2 The layer of soil responsible for 85-90% of plant growth |
| 3 Increases soil water-holding capacity 100 times or so | 4 A symbiosis in which certain fungi break down detritus and funnel the results into plant roots |
| 9 Humus degrades from low detritus replacement rate; soil declumps; soil fertility declines rapidly | 5 Fostering the decay of detritus to produce a humus-like material |
| 10 Roundworms that destroy plant root systems; target of predatory fungus Arthrobotrys anchonia | 6 These prevent soil erosion and reduce evaporative water loss |
| 7 These add nitrates to the soil and are responsible for most detritus decomposition | |
| 8 Excreted clumps of soil and humus bound together in guts of earthworms |