Author(s):

Ramesh Naik Malavath and Satyam Raj Thurpu

Abstract: An investigation was undertaken during kharif, 2018. Twenty eight surface soil samples representing seven turmeric (Curcuma longa L.) growing mandals of Nizamabad districts of Telangana namely Sirikonda, Armoor, Kammarpally, Velpur, Balkonda, Jakranpally and Dharpally were studied for their physico-chemical properties and fertility status in relations to study molecular investigations on root-knot nematode resistance in turmeric cultivars. The climate of the study area was semi arid and monsoonic climate. The sites selected were confined to nearly level to gently undulating slopes and have granular to sub angular blocky structures. All the soils showed well developed structural variation and exhibited granular to sub angular blocky structure. The soil texture varied from sandy loam to clay. The sand, silt and clay content ranges from 18.2 to 71.4, 4.4 to 18.7 and 20 to 68.2, per cent respectively. The, pH, EC, OC, CaCO₃, exchangeable Ca²⁺and Mg²⁺ and available N, P, K 6.5 to 8.1, 0.12 to 0.36 dSm^-1, 4.6 to 7.0 gkg^-1, 1.1 to 5.0 gkg^-1, 6.2 to 21.8 c mol (p+) kg^-1, 2.9 to 14.7 c mol (p+) kg^-1, 198 to 285 kg ha^-1, 14.0 to 34.0 kg ha^-1 and 232 to 393 kg ha^-1 respectively. The soils are neutral to slightly alkaline in reaction and non-saline. The soils are low to medium in available nitrogen, medium to high in available phosphorus and potassium.

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