It is RESONANCE which heals the plants, soil, water and air.

The specific pyramid of Agnihotra. Material copper or gold.
The specific frequencies of the different steps of the pyramid could be measured if a scientist wishes to put his mind into it.
The most intensive sound waves have their origins at the four sides of the pyramid, forming a small angle. From inside the pyramid a standing wave of certain frequency is sent out.
When these specific Mantras are uttered at the specific times given by the computer, based on one specific definition of sunrise/sunset, RESONANCE takes place in the pyramid. The most powerful effect is with the word SWAHA.
It is RESONANCE which heals. This is how plant plagues and epidemics are eliminated.

Large areas could be treated for plant disease eradication from one central place which acts like a generator of healing energies. Some special techniques will be performed there based on pyramid fires tuned to full moon/no moon/4th (fourth) day after full moon/ 14th (fourteenth) day after full moon, etc.

Ancient science states that this resonance invigorates the cells of plants and helps the reproductive cycle. Resonance plays a vital role in nature. HERE WE HAVE TO CONSIDER A HEALING MOLECULAR SPECTRUM FAR BEYOND THE INFRARED, INDEED BEYOND THE WHOLE ELECTROMAGNETIC SPECTRUM.

Also some configuration of pyramids could be done at a few places surrounding the farm to spread the healing effects to wider areas. Materials used will be dried cow dung, clarified cow's butter, some medicinal herbs, firewood from some specific medicinal trees, etc. combined with specific Mantras.

The computer software for timings of these fires is made in Germany, based on one specific definition of sunrise/sunset as given by the ancient seers and are given free in all continents.
Following is the description of sunrise as given in ancient science. ( This is not a definition but a description)

At sunrise the many fires, electricities, ethers and more subtle energies emanating from the sun extend all the way to the Earth and produce a flood effect at those coordinates where the sun is said to rise. It is awesome. The flood enlivens and purifies everything in its path, destroying what is impure in its wake. This torrent of life-sustaining energies causes all life to rejoice. At sunrise that music can be heard. The morning Agnihotra Mantra is the essence of that music. It is the quintessential sound of that flood. At sunset the flood recedes.