Micronutrient sulfates & chelates are water soluble fertilizers
Water soluble fertilizers are subject to leaching, drainage causing -
> Water & air pollution.
> High wastage of nutrients.
Nutrients become non-available over time due to soil fixation requiring -
> Excess dosage and frequent applications of fertilizers.
Mismatch between plant requirement & nutrient availability because -
> Crop nutrient requirements vary during growth period.
> Current fertilizer applications result in feeding through a fire-hose.
> Either over nourishment or deprivation of key nutrients during plant growth cycle.
Introduction of undesirable components -
> Soil acidification
> Accumulation non-biodegradable compounds. EDTA is non-biodegradable & a serious pollutant of water