Why is there no interest in micro-fertilization, especially when growing grain crops?
The most common word used is fertigation where high water and nutrient use efficiency could be achieved. Fertigation gives best results in widely spaced crops and instalation of such system is cost effective for widely spaced crops but it is costly for closely spaced crops. Perhaps this is the reason that it is not used for grain crops. But research results concludes that fertigation is equally effective for food grain crops such as rice, maize, pigeon pea etc
Yes it has been a neglected field, as micro irrigation was seem as having greater relevance to horticulture crops/
It is not the matter of interest , I have some researches about boron application on wheat cultivars as an inducer for drought resistant , Nitrogen has the main interest after P and K , because nitrogen is the main factor for possessing bigger vegetation growth , then increasing of photosynthesis and producing more grain yield for food or producing more leaves and green parts for feed.
It depends on the socio-economic status of the farmers along with the growing conditions (rainfed areas and availability of stored water).
Micro fertigation is not done in rice due to close planting and require more water. But nowadays drip system is followed in rice to save 500 mm of water,
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