## 4 Discussion  
Maintaining soil quality depends on environmental conditions, physical-chemical characteristics of the soil, such as permeability and capacity to store water, and soil microbial communities. Building a microbial functional diversity and redundancy is a key factor for a stable plant-soil system. This can be reached by adopting several sustainable practices such as no tilling, soil covering, no or low inputs of chemicals, culture rotation, and microorganism application [33; 34; 35]. In the present study, microbial treatments were presented for use in agriculture with the aim of increasing soil biodiversity, promoting plant growth with greater efficiency, enhancing nutrient cycling, and making them available to the roots. The microbial consortium has a biodiversity that came from organic compounds; many bacteria present in the symbiotic consortium are already known in the literature as bacteria that promote plant growth, such as _Clostidium_ spp. and _Ruminooccus_, which also have cellulolytic activity [36; 37]. Bokashi has a microbial diversity which came from production processes and from EM, and vermicompost tea also has microorganism diversity [38]. Although _A. platensis_ is a single organism, it is known that cyanobacteria can stimulate soil microbiota diversity and represent a rich source of macro and micro nutrients and phytohormones [39]. Moreover, non-sterilized vermicompost tea was used for the production; this tea is supposed to carry other beneficial microorganisms [38; 40]. The initial hypothesis was that these microorganisms could improve the plants' development and soil quality. Plant growth-promoting bacteria can induce improvements in morphological root traits by producing plant growth regulators and signaling molecules in the rhizosphere [41; 42; 43]. With a longer root system and more root surface area, the plant can scavene more efficiently the soil nutrients, especially those with low motility in the soil [44; 45]. Root tissue density is related with how the plant interact with the soil, even having impact in soil carbon dynamic. Specific root exudation rate (amount of root exudate per gram of dry root over time) is decreased with high root tissue density [46]. Root exudates represent a chemical interface \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**Beetroot**} & \multicolumn{3}{c}{**Carrot**} \\ \cline{2-9}  & \multicolumn{2}{c}{**Shoot Fresh**} & \multicolumn{2}{c}{**Root Fresh Weight**} & \multicolumn{2}{c}{**Shoot Fresh**} & \multicolumn{2}{c}{**Root Fresh Weight**} & \multicolumn{1}{c}{**Length**} \\  & \multicolumn{2}{c}{**Weight**} & & \multicolumn{2}{c}{**Root Fresh Weight**} & \multicolumn{1}{c}{**Root Fresh Weight**} & \multicolumn{1}{c}{**Length**} \\  & & \multicolumn{2}{c}{**g**} & & & **g** & **cm** \\ \hline \multirow{4}{*}{\
\begin{tabular}{c} First \\ Experiment \\ \end{tabular} } & C & 4.30 & b & 1.34 & b & 34.07 & 53.22 & 16.62 \\  & CT & 7.27 & ab & 3.51 & ab & 43.79 & 63.65 & 16.18 \\  & Ap & 9.21 & a & 5.70 & a & 52.90 & 68.60 & 16.69 \\  & MC & 17.43 & a & 6.71 & a & 39.20 & 61.95 & 16.50 \\  & Bk & 10.32 & a & 6.50 & a & 49.26 & 63.72 & 15.57 \\  & C.V. (\%) & 47.35 \({}^{\star}\) & & 26.38 \({}^{\star\star}\) & & 25.24 \({}^{\star\star}\) & 34.5 & 10.55 \\ \hline \multirow{4}{*}{
\begin{tabular}{c} Second \\ Experiment \\ \end{tabular} } & C & 17.77 & 4.37 & 8.53 & 36.13 & ab & 14.43 \\  & CT & 25.77 & 6.91 & 13.63 & 57.56 & a & 14.93 \\  & Ap & 19.85 & 5.67 & 10.05 & 44.55 & ab & 14.28 \\  & MC & 21.45 & 6.98 & 13.22 & 57.53 & a & 15.25 \\  & Bk & 19.63 & 6.62 & 6.99 & 28.72 & b & 13.68 \\  & C.V. (\%) & 28.24 ** & 23.83 ** & 37.84 & 35.46 & & 17.46 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Means of the variables analysed in the productivity of beetroot and carrot with five repetitions in different treatments in the agroforestry system. for the communication between the plant and microorganisms, which will use it as energy source [47].