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Agro technologies to improve productivity

AICRP on Tuber Crops has conducted several location specific agronomic experiments at different states through its centres and identified many adaptive technologies for improving the production and productivity of tuber crops.

  • Technology for rearing eri-silk worm for the production of eri silk using cassava leaves in the state of Assam.

  • Integrated  nutrient management using 3/4th dose of  FYM + NK + Green Manure at 25 t ha-1 was optimum for recording highest tuber yield in cassava and is recommended in Maharashtra, AP and in Tamil Nadu.

  • Green manuring cowpea at 50 kg/ha could replace application of FYM for getting maximum tuber yield in cassava in AP and Chhattisgarh.

  • Integrated nutrient management involving application of  Daincha green manuring @ 50 kg/ha + RD of K+ 50 % RD of NP + Azospirillum(5 kg/ha) + PSB (5 kg/ha) was found ideal for maximum cassava tuber yield in Chhattisgarh.

  • A combination of FYM 10 t ha-1, vermi compost/poultry manure 2.5 t ha-1 + Azospirillum and Phosphobacterium 5 kg/ha was optimum for organic production of sweet potatoin West Bengal and Manipur.

  • For organic production of sweet potato, application of FYM 10 t ha-1 + neem cake 1 t ha-1 + Azospirillum and Phspohobacterium 5 kg/ha wasideal in AP.

  • The sweet potato variety Sree bhadra with straw mulching performed better in rice based cropping system in Odisha.

  • In West Bengal, Bihar, Assam and Manipur  , application of 1/3rd or 2/3rd recommended N (60 kg N ha-1) + 2 kg Azospirillumha-1 as vine dipping + 10 kg Azospirillum ha-1 as soil application was found ideal to increase the marketable tuber yield in sweet potato.

  • Under organic cultivation of EFY, vermicompost at 5 t ha-1 + Azospirilum 5 Kg/ha + Phosphobacterium 5Kg/ha + Ash 5 t ha-1was found optimum inUttar Pradesh and Jharkhand.


  • Intercropping EFY with Turmeric in 1:2 ratio was the optimum combination  in UP, Jharkhand, Odisha, and AP.

  • Application of bio fertilizers such as Azospirilum, Phosphobacterium with recommended dose of FYM could reduce the requirement of chemical fertilizers by 25% inGujarat, AP, Tamil Nadu and Jharkhand.

  • EFY yield under organic sources involving FYM or vermicompost or poultry manure + biofertilizers + ash is recommended against standard practices in Gujarat. Organic production of EFY by the application of FYM 10t ha-1, ash 5 t ha-1 +Azospirilum 5kg/ha + AMF 5kg/ha is recommended for Bihar.

  • Based on AICRP findings, intercropping of tuber crops especially elephant foot yam, sweet potato, and taro in orchard of litchi, mango, cashew and banana enhanced returns to the tune of 1.5 to 2 Lakhs per ha as additional revenue in the States of West Bengal, Andhra Pradesh, Bihar, Chhattisgarh, Jharkhand, Maharashtra, Tamil Nadu and Uttar Pradesh.

  • Turmeric and ginger were found to be ideal intercrops in elephant foot yam intercropped in the ratio of 1:2 for getting maximum yield equivalents and B: C ratio.

  • Turmeric and Ginger were identified as suitable intercrops in taro giving maximum yield equivalents in 1:1 ratio and was recommended in Manipur.Taro + Turmeric in 1:1 ratio proved best for optimum taro yield and intercrop turmeric yield in Chhattisgarh.

  • In west Bengal cormel treatment with Carbendazim (0.05%) and Trichoderma viride (0.05%) and stored in pacca floor gave good result in keeping taro cormels for more than two months without rotting.Cormels stored in pits lined with polyethylene sheet containing dry sand is found to be ideal under Assam conditions.

  • Seed tuber treatment with Trichoderma viride (5g/ kg cow dung slurry and soil application of 1 kg Trichoderma viride enriched compost per pit) resulted in higher colocasia tuber yield.

Tuber Crops Based farming system studies