Any method or technique are there to maintain homogenous weed population (approx. equal proportion of weed flora, diversity and density) on entire experimental plots to check the exactly efficacy of weed control method/herbicides.
The exact method is by germinating your weed seeds then transplant on specific distance you like according to density required. Wish you luck.
You need to perform a greenhouse experiment using replicates of the species, rather than outdoor plots :)
I agree with the suggestions provided by @Andrew Paul McKenzie Pegman and @Medhat Elsahookie. Moreover, in field conditions, you may think of re-seeding/planting to maintain the same upto a certain period.
This can be done by removing weeds from the plots of definite dimensions by adopting any initial weed control practices followed by sowing of weed seeds in the rows..."Row to row distance", "number of weed population required", "plant to plant distance", "sowing geometry" and "how many weed species one wanna have in field" may vary from experimenter to experimenter...
Sowing of weed seeds than make uniformity of weeds after that we can check ......
Could you reduce the experimental error due to heterogeneus weed population using blocks in your experimental design and local-controls?
Yes, Paula Serrano-Pérez, it is useful in the case of crop plant homogeneity, but it works only to some extent in the case of weed population and diversity homogeneity.
it's difficult, but statistically error coefficient can be helpful to reduce heterogeneity
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