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Table 1 Selected physicochemical properties of topsoil (0–20 cm depth) of the two experimental sites and manure

From: Soil fertility status of cassava fields treated by integrated application of manure and NPK fertilizer in Zambia

Parameters Mansa Kabangwe Manure Requirementb
Particle size (%)
Sand 77 54   
Silt 7 20   
Clay 16 26   
Textural class Sandy loam Sandy clay loam   
pH (water) 4.9 5.28 7.48 3.5–4.5 (in H2O 1:1)
OC (%) 1.07 1.19 26 1–2 (Walkley and Black)
TN (%) 0.05 0.06 3.6  
C/N 22.34 19.39 7.86  
AP (mg kg−1) 20.51 3.78 1.32a 2–4
CEC (cmol+ kg−1) 2.97 4.56 22.01  
Exchangeable bases (cmol + kg −1 )
Ca 1.22 2.57 8.6a 0.25–1
Mg 0.29 1.2 0.62a 0.2–0.4
K 0.12 0.09 1.99a 0.1–0.15
Na 0.044 0.045 7.75  
Total exchangeable bases 1.674 3.905   
Micronutrients (mg kg−1)
Zn 0.74 0.41 142.8 0.5–1
Cu 6.18 1.31 10.39 0.1–0.3
Mn 57 107 182 5–10
Fe 78 59 95 1–10
  1. aResults are expressed in percent (%)
  2. bLow level cassava requirement as stated in Howeler (2014)