Hello Simerjeet, I suggest you shed more light on your question. It is possible that significant difference in weed density and mass of treatment plots and weedy check not to translate to significant difference in yield. A lot of factors such as weed type, crop tolerance etc play role

Hello,

the crop yield is correlating mostly with biomass of weed, not with number weed.

More detail about my question:

Let our 10 treatments are one herbicide with variable doses along with one weedy check treatment in RCBD design. In weed dry matter, herbicide will have differential effect on different weed thus variable range of weed biomass and yield. But weedy treatment will have highest weed biomass with lowest yield. then if we compute LSD on the basis of these ten treatments, there will be statistical difference between weedy and herbicide effect. But the fine difference between effects of variable dose of herbicide will be missing. In that case if we opted for functional analysis, ANOVA of treatment effect will be split into two: herbicide v/s weedy and within herbicide doses.

then effect will be more clear?????