Is there any fertilizer dosage difference for the same size of rainfed and irrigated land? Consider all the factors to be same like soil type, land size, nutrient availability, ph etc. only difference is one land is a rainfed one an the other is irrigated.
Dear
Provided that all soil characteristics are same and ofcourse the ''geographical location'' should also be same as climatic factors play major role in water consumption:
I will say, in both cases if the ''water availability is not defficient'' the amount of fertilizer for a ''given plant'' would be same. Within the case of irrigated land you can mix water and fertilizer to apply at a time taking into account backwater in the sprayer is avoided.
Hope it will give you hint
addition of plenty of organic matter, fertigation and substitution of part of soil application by foliar spray of nutrients. The aim should not be the maximum productivity but the optimum.
I think there are many factors should be consider in this case such as:
1- the level of rainfall...
2. the type of soil
3. the type of the fertilizer
4. the irrigation system
5. Type of the crop, crop water and elements requirements
Well if all the factors you mentioned are controlled, the difference would depend on the types of fertilizer applied, does it need water to solubilize? In what levels? Only then will the water factor play a role.
The risk factor of loss of fertilisers, when there is excessive frainfall and deleteriouseffect when there occurs water stress due to drought are magnified. Hence in order to keep the efficiency of fertiliser use high the application of fertilser application is lower and applied in different split doses.
Response to fertilizers will be more for irrigated land compared to rainfed land. So, fertilizer requirement will be more for irrigated land.
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