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Table 8 Study site and soil fertility characteristics

From: Genotypic and environmental factors influence the proximate composition and quality attributes of sweetpotato (Ipomoea batatas L.)

Characteristics Units Corozal Codazzi Cerete Carmen B Tolu Riohacha
Coordinates   9″17′34.38″’N, 7″°20′9.00′ W 1″°00′01.2″’N, 7″°15′22.4′ W 8″50′27.47″’N, 75″48′27.5′” W ”°42′50.8″’N, 7″°06′26.9′ W ”°29′21.6″’, 07″°34′12.9′ W 11″07′15.05″’N, 72″59′22.87″ W
Landscape   Plains Foothills Plains Mountains and foothills Hills and valley Hills
Mean temperature (°C) 26.9 28.1 27.7 26.9 27.6 28.3
Annual rainfall (mm) 1,127 1,560 1,264 1,179 1,129 588
Soil texture   Sandy-loam Sandy-loam Clayey Clay–loam Sandy Sandy
Soil characteristics:      
pH   7.21 7.84 6.99 7.18 6.03 6.71
OM % 1.31 1.66 2.87 2.55 3.07 1.22
P mg/kg 15.78 150.30 10.09 28.83 20.38 29.83
S mg/kg 3.32 4.17 8.77 2.32 6.2 17.57
Ca cmol(+)/kg 17.29 13.04 14.79 21.74 18.68 9.68
Mg cmol(+)/kg 5.77 1.14 6.11 6.69 8.81 2.40
K cmol(+)/kg 0.30 0.31 0.50 0.20 0.92 0.24
Na cmol(+)/kg 0.40 0.32 0.20 0.29 2.18 0.80
CEC cmol(+)/kg 23.76 14.80 21.59 28.92 30.59 13.14
EC dS/m 0.19 0.61 0.92 0.20 0.3 0.92
Feav mg/kg 13.20 27.19 44.16 46.15 77.05 31.77
Cuav mg/kg 1.28 2.87 5.90 1.29 3.15 1.29
Mnav mg/kg <1.00 3.20 <1.00 13.22 16.82 2.96
Znav mg/kg <1.00 1.28 1.04 1.20 3.08 1.32
Bav mg/kg 0.23 0.21 0.27 0.51 0.26 0.49
Harvest period (year)   2015
2016
2015
2016
2015A
2015B
2016
2015
2016
2016 2015
  1. *pH water: soil 2.5:1.0, organic matter (OM), phosphorus (P) Bray II, sulfur (S) monocalcium phosphate, calcium (Ca), magnesium (Mg), potassium (K), and sodium (Na), cation exchange capacity (CEC), electric conductivity (EC) 2.5:1.0 relation, available iron (Fe), copper (Cu), manganese (Mn), zinc (Zn) and boron (B)
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