scholarly journals Positive associations of soil organic matter and crop yields across a regional network of working farms

2021 ◽  
Author(s):  
Emily E. Oldfield ◽  
Mark A. Bradford ◽  
Abigail J. Augarten ◽  
Eric T. Cooley ◽  
Amber M. Radatz ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Crop Yields ◽  
Regional Network

scholarly journals European survey shows poor association between soil organic matter and crop yields

2020 ◽  
Vol 118 (3) ◽  
pp. 325-334
Author(s):  
Wytse J. Vonk ◽  
Martin K. van Ittersum ◽  
Pytrik Reidsma ◽  
Laura Zavattaro ◽  
Luca Bechini ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Sugar Beet ◽  
Significant Positive Correlation ◽  
Agricultural Land ◽  
Crop Yields ◽  
Carbon Sink ◽  
Significant Negative Correlation ◽  
Positive Correlation ◽  
Farm Survey

AbstractA number of policies proposed to increase soil organic matter (SOM) content in agricultural land as a carbon sink and to enhance soil fertility. Relations between SOM content and crop yields however remain uncertain. In a recent farm survey across six European countries, farmers reported both their crop yields and their SOM content. For four widely grown crops (wheat, grain maize, sugar beet and potato), correlations were explored between reported crop yields and SOM content (N = 1264). To explain observed variability, climate, soil texture, slope, tillage intensity, fertilisation and irrigation were added as co-variables in a linear regression model. No consistent correlations were observed for any of the crop types. For wheat, a significant positive correlation (p < 0.05) was observed between SOM and crop yields in the Continental climate, with yields being on average 263 ± 4 (95% CI) kg ha−1 higher on soils with one percentage point more SOM. In the Atlantic climate, a significant negative correlation was observed for wheat, with yields being on average 75 ± 2 (95%CI) kg ha−1 lower on soils with one percentage point more SOM (p < 0.05). For sugar beet, a significant positive correlation (p < 0.05) between SOM and crop yields was suggested for all climate zones, but this depended on a number of relatively low yield observations. For potatoes and maize, no significant correlations were observed between SOM content and crop yields. These findings indicate the need for a diversified strategy across soil types, crops and climates when seeking farmers’ support to increase SOM.

scholarly journals Soil pH, Soil Organic Matter, and Crop Yields in Winter Wheat-Summer Fallow Systems

2017 ◽  
Vol 109 (2) ◽  
pp. 706-717 ◽  
Author(s):  
Rajan Ghimire ◽  
Stephen Machado ◽  
Prakriti Bista
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Winter Wheat ◽  
Soil Ph ◽  
Crop Yields ◽  
Fallow Systems ◽  
Summer Fallow

SOIL ORGANIC MATTER, CROP YIELDS, AND LAND USE IN THE TEXAS BLACKLAND

Soil Science ◽  
1954 ◽  
Vol 77 (5) ◽  
pp. 377-388 ◽  
Author(s):  
R. M. SMITH ◽  
D. O. THOMPSON ◽  
J. W. COLLIER ◽  
R. J. HERVEY
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Crop Yields

scholarly journals Global meta-analysis of the relationship between soil organic matter and crop yields

2018 ◽  
Author(s):  
Emily E. Oldfield ◽  
Mark A. Bradford ◽  
Stephen A. Wood
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Crop Yields ◽  
Soil Management ◽  
N Fertilizer ◽  
Sustainable Intensification ◽  
Yield Potential ◽  
Environmental Harm ◽  
Local Data ◽  
Potential Yield

Abstract. Resilient, productive soils are necessary to sustainably intensify agriculture to increase yields while minimizing environmental harm. To conserve and regenerate productive soils, the need to build and maintain soil organic matter (SOM) has received considerable attention. Although SOM is considered key to soil health, its relationship with yield is contested because of local-scale differences in soils, climate, and farming systems. There is a need to quantify this relationship to set a general framework for how soil management could potentially contribute to the goals of sustainable intensification. We developed a quantitative model exploring how SOM relates to crop yield potential of maize and wheat in light of co-varying factors of management, soil type, and climate. We found that yields of these two crops are on average greater with higher concentrations of SOC. However, yield increases level off at ~ 2 % SOC. Nevertheless, approximately two thirds of the world's cultivated maize and wheat lands currently have SOC contents of less than 2 %. Using this regression relationship developed from published empirical data, we then estimated how an increase in SOC concentrations up to regionally-specific targets could potentially help reduce reliance on nitrogen (N) fertilizer and help close global yield gaps. Potential N fertilizer reductions associated with increasing SOC amount to 7 % and 5 % of global N fertilizer inputs across maize and wheat fields, respectively. Potential yield increases of 10 ± 11 % (mean ± SD) for maize and 23 ± 37 % for wheat amount to 32 % of the projected yield gap for maize and 60 % of that for wheat. Our analysis provides a global-level prediction for relating SOC to crop yields. Further work employing similar approaches to regional and local data, coupled with experimental work to disentangle causative effects of SOC on yield and vice-versa, are needed to provide practical prescriptions to incentivize soil management for sustainable intensification.

The Role of Soil Organic Matter for Maintaining Crop Yields: Evidence for a Renewed Conceptual Basis

2018 ◽  
pp. 35-79 ◽  
Author(s):  
Per Schjønning ◽  
Johannes L. Jensen ◽  
Sander Bruun ◽  
Lars S. Jensen ◽  
Bent T. Christensen ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Crop Yields ◽  
Conceptual Basis

Soil Organic Matter Levels and Crop Yields in Puerto Rico1

1954 ◽  
Vol 18 (4) ◽  
pp. 489
Author(s):  
M. A. Lugo-López ◽  
J. A. Bonnet ◽  
E. Hernández-Medina ◽  
P. Landrau ◽  
G. Samuels
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Crop Yields

scholarly journals Crop yields and soil organic matter responses to sheep grazing in US northern Great Plains

2013 ◽  
Vol 134 ◽  
pp. 133-141 ◽  
Author(s):  
Joy L. Barsotti ◽  
Upendra M. Sainju ◽  
Andrew W. Lenssen ◽  
Cliff Montagne ◽  
Patrick G. Hatfield
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Great Plains ◽  
Crop Yields ◽  
Northern Great Plains ◽  
Sheep Grazing
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