Potentially mineralizable nitrogen: a soil health indicator

Crops & Soils ◽  
2019 ◽  
Vol 52 (4) ◽  
pp. 8-10 ◽  
Author(s):  
Navreet K. Mahal ◽  
Michael J. Castellano ◽  
Fernando E. Miguez
Keyword(s):  
Soil Health ◽  
Health Indicator ◽  
Potentially Mineralizable Nitrogen ◽  
Mineralizable Nitrogen

scholarly journals Exploring Overwintered Cover Crops as a Soil Management Tool in Upper-midwest High Tunnels

HortScience ◽  
2022 ◽  
Vol 57 (2) ◽  
pp. 171-180
Author(s):  
Elizabeth A. Perkus ◽  
Julie M. Grossman ◽  
Anne Pfeiffer ◽  
Mary A. Rogers ◽  
Carl J. Rosen
Keyword(s):  
Cover Crops ◽  
Cover Crop ◽  
Soil Health ◽  
Management Tool ◽  
Winter Rye ◽  
Bare Ground ◽  
High Tunnels ◽  
Potentially Mineralizable Nitrogen ◽  
Mineralizable Nitrogen ◽  
Extractable Soil

High tunnels are an important season extension tool for horticultural production in cold climates, however maintaining soil health in these intensively managed spaces is challenging. Cover crops are an attractive management tool to address issues such as decreased organic matter, degraded soil structure, increased salinity, and high nitrogen needs. We explored the effect of winter cover crops on soil nutrients, soil health and bell pepper (Capsicum annuum) crop yield in high tunnels for 2 years in three locations across Minnesota. Cover crop treatments included red clover (Trifolium pratense) monoculture, Austrian winter pea/winter rye biculture (Pisum sativum/Secale cereale), hairy vetch/winter rye/tillage radish (Vicia villosa/S. cereale/Raphanus sativus) polyculture, and a bare-ground, weeded control. Cover crop treatments were seeded in two planting date treatments: early planted treatments were seeded into a standing bell pepper crop in late Aug/early September and late planted treatments were seeded after bell peppers were removed in mid-September At termination time in early May, all cover crops had successfully overwintered and produced biomass in three Minnesota locations except for Austrian winter pea at the coldest location, zone 3b. Data collected include cover crop and weed biomass, biomass carbon and nitrogen, extractable soil nitrogen, potentially mineralizable nitrogen, microbial biomass carbon, permanganate oxidizable carbon, soil pH, soluble salts (EC), and pepper yield. Despite poor legume performance, increases in extractable soil nitrogen and potentially mineralizable nitrogen in the weeks following cover crop residue incorporation were observed. Biomass nitrogen contributions averaged 100 kg·ha−1 N with an observed high of 365 kg·ha−1 N. Cover crops also reduced extractable soil N in a spring sampling relative to the bare ground control, suggesting provision of nitrogen retention ecosystem services.

scholarly journals Soil Protein as a Rapid Soil Health Indicator of Potentially Available Organic Nitrogen

ael ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 180006 ◽  
Author(s):  
Tunsisa T. Hurisso ◽  
Dan J. Moebius‐Clune ◽  
Steve W. Culman ◽  
Bianca N. Moebius‐Clune ◽  
Janice E. Thies ◽  
...  
Keyword(s):  
Organic Nitrogen ◽  
Soil Health ◽  
Health Indicator ◽  
Soil Protein

Potentially mineralizable nitrogen, decomposition rates and their relationship to temperature for five Queensland soils

Soil Research ◽  
1981 ◽  
Vol 19 (3) ◽  
pp. 323 ◽  
Author(s):  
CA Campbell ◽  
RJK Myers ◽  
KL Weier
Keyword(s):  
Tropical Soils ◽  
Exchange Capacity ◽  
Total Carbon ◽  
Surface Soils ◽  
Total N ◽  
Net Nitrogen Mineralization ◽  
Subsurface Soil ◽  
Potentially Mineralizable Nitrogen ◽  
Red Earth ◽  
Mineralizable Nitrogen

The procedure of Stanford and coworkers was used to quantitatively relate net nitrogen mineralization in five Queensland semi-arid soils to temperature. The concentration of potentially mineralizable nitrogen (No) (1) ranged from 67 �g nitrogen g-1 for a red earth subsoil to 256 for a recently cultivated cracking clay surface soil, (2) was directly proportional to total soil carbon, (3) was greater in surface than in subsurface soil, and (4) was greater in subtropical than tropical soils. Expressed as a fraction of total nitrogen (No/Total N), it ranged between 8 and 21%, and was directly proportional to cation exchange capacity, perhaps implicating expanding lattice clays in stabilization of cell lysates and metabolites. The mineralization rate constant (k) was directly proportional to total carbon, the fuel for microbially mediated reactions in soil. The average k for surface soils was interpolated to be 0.058, 0.031, and 0.018 week-1, corresponding to half-lives of 11.9, 22.4 and 38.5 weeks, at 35�, 25� and 15�C, respectively; these values are similar to those reported for U.S.A. and Chilean soils. The Arrhenius relationship between k and temperature for surface soils (log k = 6.14-2285/T) was similar to that reported by Stanford for U.S.A. soils, and indicates that this relationship might be a general one.

Usability of soil survey soil texture data for soil health indicator scoring

2018 ◽  
Vol 49 (15) ◽  
pp. 1826-1834 ◽  
Author(s):  
E. A. Mikhailova ◽  
C. J. Post ◽  
M. A. Schlautman ◽  
J. M. Galbraith ◽  
H. A. Zurqani
Keyword(s):  
Soil Texture ◽  
Soil Health ◽  
Soil Survey ◽  
Health Indicator

scholarly journals Does potentially mineralizable nitrogen predict maize yield in newly cropped soil?

age ◽  
2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Maheteme Gebremedhin ◽  
Sait Sarr ◽  
Mark Coyne ◽  
Ann Freytag ◽  
Karamat R. Sistani
Keyword(s):  
Maize Yield ◽  
Potentially Mineralizable Nitrogen ◽  
Mineralizable Nitrogen
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