11. Potash management in black gram

Thematic area : Nutrient management in black gram
Year of release : Under pipe line
Details of the technology :
Crop : Black gram (Vigna mungo)
Variety : Pant U - 19, T - 9.
Nutrients : Nitrogen 15 kg/ha, Phosphorus 35 kg/ha and Potash 15 kg/ha
Method of fertilizer application : Basal application during land preparation.
Sowing time : Mid August _ Mid September
Duration : 80 - 95 days
Land preparation : 3 - 4 ploughing followed by laddering.
Spacing : 30 x 10 cm
Farming situation : High land
Agro-climatic zones : Central Brahmaputra Valley Zone,
Lower Brahmaputra Valley Zone,
Upper Brahmaputra Valley Zone,
North Bank Plain Zone.
Source of technology : Regional Agricultural Research Station
Assam Agricultural University
Shillongini, Nagaon _ 782002, Assam
Source of critical inputs : Annexure _ I
Benefit Cost Ratio : 3.39:1
Observations to be recorded :
i) Temperature
ii) Rainfall
iii) Date of application of fertilizers
iv) Date of sowing
v) Date of germination
vi) Date of weeding
vii) Days to 50% flowering
viii) Plant height
ix) Pest infestation
x) Disease infection
xi) Yield
xii) Potash content of soil before and after crop.
xiii) Farmers' reaction
Technology assessment (Matrices) : Annexure _ IV