Manure Nutrients Relative to The Capacity Of Cropland And Pastureland To Assimilate Nutrients: Spatial and Temporal Trends for the United States

Kellogg, Robert L.; Lander, Charles; Moffitt, David C.; Gollehon, Noel R.

doi:10.2175/193864700784994812

Cited by 250 publications

(295 citation statements)

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“…Our results show that manure P was typically associated with P surpluses in areas with high livestock densities but insufficient cropland to effectively assimilate the manure P produced by these animals (22,36). In some regions with low manure recoverability (e.g., South Asia and Africa) (21), there may be a large magnitude of potentially underused manure P currently lost from agricultural systems that could serve as a useful organic fertilizer source to reduce reliance on inorganic P fertilizers.…”

Section: Discussionmentioning

confidence: 85%

“…S2 and Potter et al (20)]. Approximately 9.6 Tg of P·y −1 , or 40% of total manure P excreted by livestock in 2000 (20), was used for cropland application based on estimates of recoverable manure for 12 regions (21) and for US states (22). Recoverable manure P shows much greater spatial variation than P fertilizer applications (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…We estimated manure P used for cropland application in each grid cell based on regional estimates of manure recoverability from Sheldrick et al (21) for 12 regions. For the United States, we used recoverable manure P fractions for cattle, pigs, and poultry from Kellogg et al (22) for each state based on comprehensive surveys of livestock confinement and manure collection. The approximate fraction of manure used as fuel was also excluded from the total recoverable manure P based on regional estimates for cattle, buffalo, and chickens for West, South, and Southeast Asia (assuming that buffalo were representative of dairy cattle) (46).…”

Section: Methodsmentioning

confidence: 99%

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Agronomic phosphorus imbalances across the world's croplands

MacDonald

Bennett

Potter

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

734

462

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Increased phosphorus (P) fertilizer use and livestock production has fundamentally altered the global P cycle. We calculated spatially explicit P balances for cropland soils at 0.5°resolution based on the principal agronomic P inputs and outputs associated with production of 123 crops globally for the year 2000. Although agronomic inputs of P fertilizer (14.2 Tg of P·y −1 ) and manure (9.6 Tg of P·y −1 ) collectively exceeded P removal by harvested crops (12.3 Tg of P·y −1 ) at the global scale, P deficits covered almost 30% of the global cropland area. There was massive variation in the magnitudes of these P imbalances across most regions, particularly Europe and South America. High P fertilizer application relative to crop P use resulted in a greater proportion of the intense P surpluses (>13 kg of P·ha −1 ·y −1 ) globally than manure P application. High P fertilizer application was also typically associated with areas of relatively low P-use efficiency. Although manure was an important driver of P surpluses in some locations with high livestock densities, P deficits were common in areas producing forage crops used as livestock feed. Resolving agronomic P imbalances may be possible with more efficient use of P fertilizers and more effective recycling of manure P. Such reforms are needed to increase global agricultural productivity while maintaining or improving freshwater quality.agriculture | eutrophication | nutrient balances | phosphorus depletion D isparities between the nutrients applied to agricultural soils via fertilizer or manure and the nutrients removed by harvested crops result in nutrient imbalances that can influence environmental quality and productivity of agricultural systems (1). Growing consumption of inorganic phosphorus (P) fertilizers derived from mining of nonrenewable phosphate rock (2) has contributed to major increases in crop yields since the 1950s (3). Concurrent growth in fertilizer use and livestock production has more than tripled global P flows to the biosphere over preindustrial levels (4), resulting in P accumulation in some agricultural soils that acts as a driver of eutrophication in freshwater and coastal systems (5-7). At the same time, limited availability of P fertilizers in other regions has contributed to prolonged P deficits that can deplete soil P and limit crop yields (8-10). Although agricultural P surpluses and deficits have been documented for several regions (e.g., refs. 11 and 12), there is still limited understanding of the spatial patterns of P imbalances at the global scale.Patterns of nutrient imbalances across agricultural systems may reflect contrasting agricultural practices, economic development, and broader agricultural policies (1, 13). Understanding agricultural P use is key to managing global phosphate rock reserves (14) and mitigating the risk for potentially irreversible eutrophication of lakes (15). Despite considerable advances in the development of spatially explicit global nitrogen balances (e.g., ref. 16), most previous global P balance studi...

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Section: Discussionmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Agronomic phosphorus imbalances across the world's croplands

MacDonald

Bennett

Potter

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

734

462

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“…Calculating the maximum nutrient application rate for each farm starts with the nutrients contained in the harvested portion of the crops grown. The amount of a nutrient, nitrogen (N) or phosphorus (P), removed by harvest for each of 24 crops was calculated using an average nutrient content per unit of crop output and the production level as outlined in Kellogg et al (2000). The amount of P removed by harvest becomes the P application standard that farmers are assumed to meet.…”

Section: Estimating the Costs Of Meeting Nutrient Standardsmentioning

confidence: 99%

“…The amount of P removed by harvest becomes the P application standard that farmers are assumed to meet. To account for unavoidable losses in the soil that make some nitrogen unavailable to plants, a "nutrient recommendation" was calculated by multiplying nitrogen removed in harvest by 1.43 (Kellogg et al, 2000). This becomes the N application standard.…”

Section: Estimating the Costs Of Meeting Nutrient Standardsmentioning

confidence: 99%

Natural Resources Conservation Service

2012

Choice Reviews Online

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Patterns and drivers of change in organic carbon burial across a diverse landscape: Insights from 116 Minnesota lakes

Dietz

Engstrom

Anderson

2015

Global Biogeochemical Cycles

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Lakes may store globally significant quantities of organic carbon (OC) in their sediments, but the extent to which burial rates vary across space and time is not well described. ) and show strong geographic separation in accordance with the degree of catchment disturbance and nutrient enrichment. Climate and basin morphometry exercise subordinate control over OC burial patterns, and diagenetic gradients introduce little bias to estimated temporal trends. Median burial rates in agricultural lakes exceed urban lakes and have increased fourfold since Euro-American settlement. The greatest increase in OC burial occurred prior to the widespread adoption of industrial fertilizers, during an era of land clearance and farmland expansion. Northern boreal lakes, impacted by historical logging and limited cottage development yet comparatively undisturbed by human activity, bury OC at rates 3X lower than agricultural lakes and exhibit much smaller increases in OC burial. Scaling up modern OC burial estimates to the entire state, we find that Minnesota lakes annually store 0.40 Tg C in their sediments, equal to 1.5% of annual statewide CO 2 emissions from fossil fuel combustion. During the period of Euro-American settlement (circa 1860-2000), cumulative OC burial amounted to 36 Tg C, 40% of which can be attributed to anthropogenic enhancement.

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Manure Nutrients Relative to The Capacity Of Cropland And Pastureland To Assimilate Nutrients: Spatial and Temporal Trends for the United States

Cited by 250 publications

References 2 publications

Agronomic phosphorus imbalances across the world's croplands

Agronomic phosphorus imbalances across the world's croplands

Natural Resources Conservation Service

Patterns and drivers of change in organic carbon burial across a diverse landscape: Insights from 116 Minnesota lakes

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