Humic Acids  


Effect of Humic Acid on Yield and Quality of Marigold  (Calendula officinalis L.)

To study the effect of humic acid on yield and yield components of marigold, a complete randomized experiment with 5 levels of humic acid treatments (0, 500, 1000, 2000, 4000 mg/l) with 3 replications and 15 experimental plots was carried out. Analysis of variance showed that the effect of humic acid treatments on number of leaves and flowers, dry weight and plant height was significantly at the 1% probability level. Mean comparisons revealed that treatment with 2000 mg/L humic acid, had the most dry weight, plant height, leaves and flowers number.

(Results of the Study by Ehsan Mohammadipour et al.)

Humic  acid  effect  on  plant  height  showed  that  treatment  with  2000  mg/l was  the  best  treatment (27,45 cm), and the control (18,55 cm) was the worst treatment.
Humic  acid  effect  on  the  dry  weight  showed  the  priority  of  2000  mg/l  with  215.7  g  rather  than  the  control (141.26 g). The positive effect of humic acid's ability to nutrients absorption could be because of it's effect on plant dry biomass which was also confirmed.

In conclusion effect of humic acid on yield and yield components of marigold was positive and this organic fertilizer can be used in future. 

Fig 1. Effect of different humic acid levels on seedling
height on Calendula officinalis L.

Fig 2. Effect of different humic acid levels on
dry weight of Calendula officinalis L.


General Benefits of Humintech Products 

Quantitative and qualitative yield increases
Regular application of high quality humic acids accumulates their effects in soils and enhances continuously the quantitative and qualitative yield increases. The dry matter of the plants is increased, which also affects the taste of fruits and vegetables positively. In addition the quality of the fruits and shelf life is extended. Our results from practice in different countries show the yield increase at different cultures. 

Reduction of water demand
The accumulation of organic matter by humic acids binds the seeping water especially in sandy soils. Thereby the water demand can be reduced up to 50% depending on the soil type. Thus precious water is saved in arid areas. 

Increase of the Nutrient`s efficiency
The addition of humic acids increase the fertilizer efficiency and the nutrient uptake by roots. Thus they can decrease the need of fertilizers up to 30% and reduce the production costs substantially. The reduction of fertilizer saves the environment at the same time. 

The profit by increased yields, improved fruit and vegetable qualities and saved fertilizer costs exceed the application costs of Humintech products definitely. You can benefit economically and ecologically from the application of humic acids based products in the long term. They are a guarantee for successful yields in any kind of soil, at any place and with any cultivation method.