Animal Manures -- The Core Input

As covered in Chapter 4, dry climates produce abundant carbon-rich material (dead grass, crop stalks, straw) but very little of the moist, nitrogen-rich "green" material that balances it, especially outside a short growing season. Manure fills that gap almost perfectly. It's genuinely nitrogen-rich, it's produced continuously by any livestock kept for food, milk or fibre, and in pastoral dryland regions across the world, from the US Southwest to the Sahel and inland Australia, it has been the default fertility input for as long as animals and crops have been kept together.

Poultry manure -- hot and high-nitrogen

Chicken, duck and other poultry manure has a very low C:N ratio, roughly 7:1 to 10:1 fresh, making it the strongest, "hottest" manure of the common types. This strength is genuinely useful but also genuinely risky: applied fresh and undiluted, it can scorch roots and foliage outright. It should always be composted first, ideally layered with plenty of dry carbon material such as straw or dry leaves, before it goes anywhere near a growing bed.

Cattle, horse, camel and donkey manure -- milder and forgiving

Cattle and horse manure sit around 18:1 to 25:1 C:N, much milder than poultry manure, and can be used more liberally with less risk of burning plants. Camel and donkey manure, important sources across many arid pastoral regions, behave similarly to horse manure: relatively dry, fibrous and mild by comparison to poultry. All of these still benefit from proper composting rather than fresh application, both for pathogen safety and to let the nutrients become plant-available gradually rather than all at once.

Goat and sheep manure -- the dryland middle ground

Goat and sheep manure typically fall around 15:1 to 20:1 C:N, a genuinely useful middle ground between poultry's strength and cattle's mildness. In a dry climate they carry an extra practical advantage: they're often already dry and pellet-like by the time they're collected, which makes them easy to store, handle and transport without the mess or smell of wetter manures, a real benefit where water for washing and cleanup is itself limited.

Manure still needs the same moisture and carbon balance as any other compost input, it doesn't get a free pass just because it's nitrogen-rich. Straw bedding mixed in with manure, the natural result of how most livestock are housed, is often already close to a good working C:N ratio, which is one reason bedded manure composts so reliably compared to manure alone.

• Balance with dry carbon -- straw, dry leaves or shredded stalks mixed through manure, particularly hot poultry manure, before piling.
• Keep it damp, not wet -- manure piles dry out just as fast as any other heap in this climate; follow the same moisture and cover principles from Chapter 2.
• Use activators where the pile is sluggish -- see Chapter 8 for urine and manure teas that can speed a stalled pile along.

Manure composting still needs adequate heat and time like any other input carrying pathogen risk. E-coli and parasite eggs are a real concern, especially with fresh manure applied near root vegetables or anything eaten raw close to the soil. Let manure fully compost, reaching a proper thermophilic heat through the pile, before using it on food-growing beds, and never apply fresh manure directly around crops intended to be eaten raw. The same heat-and-time principles covered for humanure in Chapter 7 apply here, though manure carries a generally lower pathogen risk to begin with than human waste.

Not every household keeping a food garden also keeps animals. In a self-sufficiency context, manure can often still be gathered rather than bought: communal grazing land, tracks used by herded livestock, and overnight penning areas all accumulate droppings that can be collected by hand, exactly as dryland communities have done for generations. Treat gathered manure of unknown origin as fresh and potentially pathogen-bearing, and compost it fully before it touches any growing bed.