Chicken litter -- a mixture of chicken manure and sawdust or other bedding material -- is a valuable fertilizer with newfound advantages over conventional fertilizers.Some cotton farmers in the Mississippi area are switching to chicken litter and away from standard inorganic, synthetic fertilizers. Others are interested in the possible economic benefits of using chicken litter, but are reluctant to switch without the numbers to back up their decision.
A recent Agricultural Research Service study by agronomist Haile Tewolde and colleagues provides those numbers.
Farmers know that chicken litter, an organic fertilizer, is a better soil conditioner than synthetic fertilizers, but have never had a way to assign a number to the value of that benefit. But previous studies only considered the economic value of the nitrogen, phosphorus and potassium in chicken litter, compared to that in synthetic fertilizers.
In the new study, Tewolde and colleagues figured the litter's value as a soil conditioner as an extra $17 per ton of litter. They calculated this by balancing the price tag of the nutrients in litter with its resulting higher yields, a reflection of its soil conditioning benefits. They found that cotton yields peaked 12 percent higher with organic fertilizers, compared to peak yields with synthetic fertilizers. With all benefits factored in, they found that chicken litter has a value of about $78 a ton, compared to $61 a ton when figured by the traditional method.
The economic analyses also showed that farmers could further increase their profits by using less of either fertilizer than currently used for maximum yields -- which is also good news for the environment.
Source: Agricultural Research Service, USDA
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