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It is also an important source of trace plant nutrients and has an available form of N. By synchronizing soil N. availability with plant needs, Chilean Nitrate contributes to optimal qualitative yield. The NOP allows the use of Chilean Nitrate up to 20% of your crop’s required nitrogen needs. Rate: do not used higher than 100-150 lbs per acre for heavy feeding vegetables. Do not apply close to stems of plants as this product may burn.
Applying it when temperatures are low and soils do not have the ability to produce available nitrogen is where you will get the greatest plant response (growth).
OMRI Certificate States: Operators using sodium nitrate shall use it in a manner that maintains or improves the natural resources of the operation, including soil and water quality, and comply with crop nutrient and soil fertility requirements.
For more information check out
Sodium Nitrate Application Chart.pdf