Precautions:
Comparing to be used as topdressing fertilizer, humic acid fertilizer is better to be used as
base fertilizer and seed fertilizer. Focusing manuring is better than surface applicator.
Manuring deeply is better than manuring shallowly. Meanwhile it can not entirely replace the
inorganic fertilizer and manure. It must be used together with the fertilizer, organic fertilizer.
Especially used in conjunction with phosphates fertilizer, it can get better effects.
For the humic acid fertilizers, because of the big difference in the using proportion of the raw
material. manufacturing methods and nutrient contents, when apply it, the appropriate
concentration need to be considered.
Potassium humate and sodium humate are the kinds of the hormones fertilizers. The effects
will be influenced by the temperature. Applied under the cold weather effects slowly, quickly
under hot days. Under the general temperature, the humates should be effective after 18
hours or more generally. If the temperature is higher than 38 ℃, it will accelerate respiration
and decreased crop dry matter accumulation, finally resulting in cuts. So in such extremely hot
days, it should stop or reduce the times of applications and the usage quantity.
Only with adequate soil moisture and good irrigation conditions, humic acid fertilizers can
produce the entire effects.
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