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Table 1 Studies in North America, Europe and South America using 31P-NMR to investigate P in soil under cropping systems, sorted by location

From: Characterizing phosphorus forms in cropland soils with solution 31P-NMR: past studies and future research needs

Location

Pub datea

Soilb

Crop

P fertilization (kg ha−1 year−1)

Treatment

Peak IDc

Agron. datad

Africa

 Madagascar [24]

1990

Ferrosol, Andosol

Rice

20

P forms in rice soils

B

 

 Northern Tanzania [26]

2000

Luvisol

Corn, beans

Various

Forests vs. fertilized (0 CF vs. AM) cropping systems

B

 

 Ethiopia [27]

2002

Alisol, Nitrisol

Tea, corn, corn/sorghum

Various

Cropping systems; De

B

STP

 West Cameroon [28]

2003

Palehumult

Tea plantation, food crop fields

Various

Forest vs. cropping systems (permanent, annual)

B

STP

 Madagascar [48]

2006

Oxisols

Rice

Various

Different rice cropping systems; CF, AM, COM

M

STP, Y

Asia

 Northern Thailand [25]

2000

Cambisol

Cabbage

Not given

Cultivated vs. native forests

B

 

 Shenyan, China [49]

2012

Luvisol

Corn, rice

35 or 47

Land use types, EA

B

STP

 Zhejang, China [30]

2013

Ultisol

Rice, tea, vegetables, nursery stock, bamboo

Various

Crops;

D, C

STP

 Henan, China [38]

2014

Cambisol

Winter wheat/summer corn

59

Tillage, residue incorporation, aggregates, EA

B

STP

 Jilin, China [50]

2014

Phaeozem

Corn–soybean each year

45

Tillage, aggregates

B

STP

 Jilin, China [51]

2014

Phaeozem

Continuous corn monoculture

Various

Fertilization, CF and AM, EA

M

STP

 Yunnan, China [52]

2015

Ultisols

Vegetables, horticulture

118.5–196.5

Land use, leaching losses; forests vs. open cropland, greenhouses

B

STP

 Northeastern China [53]

2015

Gleysol, lithosol

Cropland (winter wheat summer corn), vegetables, orchards

 

Land use, fertilization, EA, sorption

M

STP

 Shandong, China [54]

2016

Gleysol

Greenhouse, double-crop tomatoes

Various

CF, AM; high N fertilizer, leaching

D, C

PB, STP

Australia

 New South Wales [55]

2008

Luvisol

Continuous wheat, wheat–legume rotations

20

Tillage, stubble, rotation, microbial community

B

RP, Y

 New South Wales [35, 56]

2009, 2011

Haplorthod, Fragiudult

Vegetables

 

Pasture vs. conventional and organic vegetables and horticulture

D, C

 

 New South Wales, Queensland [57]

2014

Vertisol

Grain-fallow-cotton, pulse-fallow-cotton

6 (every 2 years)

Vertisols in Australia

D

STP

Europe, Israel

 Germany, Denmark [20, 21]

1996, 1999

Eutrochept, Hapludalf

Wheat, beet, barley rotation

0–39

Compared fertilized, cultivated fields to native soils; particle size; D

B

STP

 Finland [59]

2011

Cambisol

Barley, winter rye, pea, oats rotation

Various

Organic (AM) vs. conventional (CF) rotations

B

STP, PB

 Sweden [60]

2013

Cambisol, Phaeozem, Umbrisol

Grain-based rotation

Various

Soil textures, fertilization rates (CF, AM)

M

STP, PB

 England [62]

2013

Paleudalf

Winter wheat

0

pH gradient

D

RP

 Israel [63]

2014

Chromoxerert

Corn

40 RW, 10 CF

Irrigation, fertilization with CF or RW

D, C

STP

 Switzerland [61]

2015

Luvisol

8-year, wheat-based rotation

Various

Fertilization; 0, CF, AM, COM, SS; EH

D, C

PB, RP, Y

 Germany [58]

2015

Luvisol

Winter wheat, barley

0

Particle size fractions

B

 

 United Kingdom [10]

2015

Cambisol, Luvisol, Podzol

Winter wheat, oats, barley

Not given

Compared land uses

B

STP

North America

 Mexico [22]

1985

Vertisol

Tree garden (mango, papaya, avocado); Corn

20 (corn)

Unfertilized gardens, fertilized corn (CF)

B

 

 Saskatchewan, Canada [23]

1990

Chernozem, Gleysol, Luvisol

Cereal rotation

0

Compared to uncultivated native grasslands

B

 

 Quebec, Canada [64]

1999

Hapludalf, Humaquet

Corn

0, 44, 132

Fertilization rates

B

STP

 New York, USA [66]

2005

Fragiudepts, Dystrudepts

Corn or corn/alfalfa

Various

Compared short and long-term AM application; D

B

STP

 Pennsylvania, USA [67]

2009

Hapludults, Hapludalf, Fragiudults, Dystrudepts

Various corn-based rotations

29–120

Compared high rates of AM from various sources

M

STP

 Delaware, Maryland USA [68]

2009

Hapludult

Corn, soybean

 

Compared crop soils with AM to poultry feces, composted manure

M

STP

 Prince Edward Island, Canada [33]

2010

Podzol

Wheat, barley/soybean, fescue

Various

Tillage

D, C

STP

 Quebec, Canada [32]

2014

Humaquept

Corn/soybean rotation

0, 17.5, 35

Tillage, CF fertilization

D, C

STP

 Georgia, USA [31]

2015

Kanhapludult

Corn/winter rye, cotton/winter rye

Various

Tillage, CF and AM fertilization

D, C

 

 Saskatchewan, Canada [65]

2015

Chernozem

Continuous monoculture wheat

0, 10

Long-term with and without CF

D, C

STP, Y

 Idaho, USA [69]

2016

Haplocalcid

Wheat–potato–barley

Various

Fertilization: CF, high and low AM

D, C

STP

South America

 Rio Grande do Sul, Brazil [71]

2002

Oxisols, Paleudalt

Various, grain-based

Various

Tillage; various crop rotations

B

STP

 Minas Gerais, Brazil [72]

2003

Oxisols

Coffee plantations

5–15

Monoculture coffee vs. agroforestry coffee

B

STP

 Rio Grande do Sul, Brazil [73]

2005

Oxisols

Various crops

0, 26, 52

Greenhouse cropping experiment, multiple crop rotation cycles

B

RP

 South Chile [70]

2011

Palehumult

Lupin–wheat, oat–wheat rotations

80–90

Rotation, tillage, microbial P, enzymes

B

STP, Y

 Santa Catarina, Brazil [74]

2015

Cambisol

Apple orchard

11

Land use; CF, between and in apple tree rows

B

 

 Rio Grande do Sul and Parana, Brazil [75]

2016

Oxisol, Ultisol

Various summer crops, winter cover crop

9, 27, 70

Grazed and ungrazed winter cover crops, CF

D, C

PB, STB

  1. Within each region, publications are arranged chronologically based on date of publication
  2. AM animal manure, CF chemical fertilizer, COM compost, EA measured phosphomonoesterase and phosphodiesterase activities, EH enzyme hydrolysis, RW recycled wastewater, SS sewage sludge; please see the original publications for more details
  3. aYear of publication
  4. bAs reported in the original publication
  5. cPeak identification: B, broad (only compound classes); C, monoesters corrected for diester degradation peaks; D, detailed (most peaks identified); M, moderate (some peaks identified)
  6. dAgronomic information was included; PB, P balance(input–removal); RP, resin-extractable P; STP, soil test P (Olsen P, Mehlich P); Y, yield
  7. eD: extracted sample dialyzed prior to NMR analysis