I seek the experts suggestions / guidance to apply the fertilizer doses according to the medium range (3-10 days) weather (Rainfall, maximum temperature, minimum temperature, morning and afternoon relative humidity, cloud cover, wind speed and wind direction) forecast especially for cotton and sugarcane crops, under Indian Punjab conditions. The description of the detailed methodology are highly welcomed.
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Dr. Sudhir Kumar Mishra
Agricultural Meteorologist
Good Evening Sir, Sudhir Kumar Mishra
I think, for fertilizer application, we usually follow the doses as recommended by the University, which can further be altered based on the soil-testing of that particular site.
Medium range weather Forecast, aids in manipulation of the management activities at field level like
We should withheld/delay fertilizer application if the forecast tell about the chances of rain in that particular area to prevent its loss due to runoff, leaching, volatilization, reduction due to ponding of water etc etc.
Apart from that we should think about, how variables other than rainfall (i.e the period in which rainfall is absent/not predicted) viz. Max and Min temperature, Relative Humidity, cloud cover, wind speed and direction as generated in the Quantitative product of these 7 weather parameters by IMD, can affect the dynamics of Fertilizers in the field.
i.e how crop and soil respond to the available/applied fertilizer in the field, at several combination of these forecasted variables.
Depending upon forecast, fertilizer can be applied without waiting for irrigation.Fertilizer can be divided into multiple split provided we know that rainfall to occur is very high.This will minimise leaching of N fertilizer/urea in soil profile.
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