Objective of this activity is to assess and refine the technologies based on local problems to best fit the socio-economic condition of the farmers and to identify the production constraints. During 2017-18, 11 nos. of On Farm Trials have been conducted on different crops involving 124 farmers, in different villages of Ranchi District. Details of the OFTs conducted during the year are as given below.
| On Farm Trial For Assessment and Refinement of Technologies | No of Farmers Involved |
| Assessment of performance of different chemicals against late blight of potato | 10 |
| Management of brown spot disease of rice caused by Helminthosporium oryzae | 10 |
| Assessment of the effect of mineral lick block Goats reared as free range grazing system | 14 |
| Assessment of performance of iron rich low cost supplementary mix for overcoming malnutrition in expectant mothers of Ranchi District | 14 |
| Assessment of performance of low cost feed management in backyard poultry unit for increasing profitability | 10 |
| Assessment of performance of raised bed and liquid manure in ginger under rain-fed | 10 |
| Assessment of performance of seaweed liquid fertilizer on growth and yield of brinjal | 10 |
| Addressing poor nodulation in chickpea in acidic soil of Ranchi district by seed priming | 15 |
| Assessment of disease resistant varieties in tomato to increase productivity and profitability | 10 |
| Assessment of performance of different backyard poultry breeds in rural areas of Ranchi District | 10 |