There are some plants secreting chemical substances which bother the other kinds of plants to grow, I have recently learned. The mechanism is called as allelopathy. It could ultimately disturb own growth. An interesting phenomenon. In a sense, it could compare to the human society, even though it is more complicated and is often driven with greed and evil will while plants just try to disturb the others in order to grow more by themselves without any intentional invasion etc.
They say that allelopathy works particularly in those grown with underground stem and Gramineae. Cogon grass and Gramineae both are annoying weeds in my property. I can't pull or dig out the stem of the former. But cutting the portion above the ground may weaken it. I have decided to cut them and dry under sunshine. expecting its allelopathy, I would use them in stead of multi sheet, which may help the soil humidified and may prevent the weeds from growing.
There is a faction called natural farming. They won't use any chemicals or even fertilizers except for a few "natural" material like rice husks. They won't pull the weeds in the farm but have the crops or vegetables live symbiotically with the weeds. Use of drieds weeds with allelopathy is their idea. I don't think natural farming skills won't provide much crops especially on commercial basis. But, their ideas seem to derive from recognition that farming should be a part of the ecological system on the globe. I believe we should stand on that viewpoint since the global warming and/or pandemic seem to be caused by excessive and violating development of nature.
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