difference of ammonium nitrogen and nitrate nitrogen
hi ron,
can you please tell me the difference of ammonium nitrogen and nitrate nitrogen as far as its relationship to plant growth ?
secondly, my lettuce ... i place them under 75% shade cloth, temperature is also hot ... around 110F at mid-day .... result is gap between nodes are really abnormal.
i am using heat resistant and bolt resistant cultivar for my lettuce, do you suppose the shade cloth is the main problem ?
regards,
sixto
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