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Table 4. Physico chemical characteristics of soils where cassava is cultivated in India

Contents Parameter Contents   Unit
Kerala Tamil Nadu Andhra Pradesh
Ultisols Vertisols Alfisols Inceptisols
Range Mean Range Mean Range Mean Range Mean
pH 4.1-5.8 5.0 7.2-8.5 8.0 5.7-8.5 6.8 4.90-6.20 5.5
OC
%
0.31-2.70 1.08 0.48-1.11 0.70 0.16-0.71 0.38 0.15-0.53 0.35
Available N kg /ha 165.20-300.15 174.23 87.36-189.30 123.80 107.25-268.13 168.70 94.52-128.89 106.55
Available P
kg /ha
15.61-39.62 28.94 16.64 - 92.70 41.35 1.57.82.77 19.82 16.78-74.98 54.60
Exchangeable K
kg /ha
60.43-174.20 98.28 60.50 -1050.00 439.30 78.4-705.0 298.12 82.63-96.71 86.24
Exchangeable Ca
cmol / kg
0.22-0.63 0.39 3.13-13.43 8.44 2.63-11.50 5.70 0.15-0.48 0.31
Exchangeable Mg
cmol / kg
0.02-0.08 0.06 1.38-3.50 2.42 0.14-1.13 0.78 0.02-0.05 0.03
Exchangeable S
mg / kg
3.47-9.55 6.51 - - - - - -
Exchangeable Fe
mg / kg
5.98-82.90 19.43 1.82-33.40 9.84 0.60-3.83 1.80 0.69-2.57 1.89
Exchangeable Mn
mg / kg
2.48-84.76 19.90 1.09-20.43 6.85 0.50-5.60 1.50 0.41-1.75 0.93
Exchangeable Zn
mg / kg
0.26-1.96 0.78 0.37-2.71 0.83 0.50-4.60 1.10 0.88-2.43 1.65
Exchangeable Cu
mg / kg
0.24-10.20 1.24 0.95-4.53 2.68 1.69-4.66 2.80 0.59-1.29 0.86
Exchangeable B
mg / kg
0.02-0.40 0.27 0.61-0.95 0.82 0.16-0.29 0.22 0.26-0.35 0.31
CEC cmol(p+) / kg 1.39-7.70 3.04 - - - - - -
BD Mg m-3 1.30-1.60 1.40 1.18-1.27 1.23 1.03-1.22 1.18 1.24-1.39 1.34
Sand % 32.10-65.80 53.70 24.75-38.50 33.69 22.61-36.48 31.21 90.50-95.90 93.80
Silt % 3.10-8.40 5.20 21.30-32.30 28.09 23.65-33.31 29.27 1.70-4.10 3.70
Clay % 26.30-62.50 42.00 29.25-54.00 38.96 28.72-47.61 39.53 1.50-3.00 2.50
Central Tuber Crops Research Institute
Sreekariyam, Thiruvananthapuram, Kerala - 17