## 3 Results  
The elemental analysis of the assessed poultry waste (feathers and bones) is presented in Table 1.  
Regarding non-combustible (inert) content, feathers are quite similar at 1.5%, while poultry bones show a significant difference, with an inert content of approximately 6.1%. Clean feathers exhibited the highest volatile content at 92.3%, indicating a high combustion ignition point and eliminating the need for an external air/O2 supply. This high volatile content suggests that the combustion ignition point remains favorable even with varying product humidity. Figure 5(a) depicts the biochar after processing at various temperatures and cooling, revealing distinct color variations, while Figure 5(b) shows the mixture used as an agricultural amendment, to enhance soil properties. \begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Average Values**} & \multicolumn{8}{c}{**Ultimate Analysis (\% db *)**} & \multicolumn{8}{c}{**Proximate Analysis (\% db *)**} & \multirow{2}{*}{**Low Heating Value**} & \multirow{2}{*}{**Average Moisture**} \\ \cline{2-2} \cline{5-10}  & **C** & **H** & **N** & **S** & **O** & & **Cl** & **VM** & **FC** & **Inert** & **Value** & **Average Moisture** \\ \cline{2-2} \cline{5-10}  & **\%** & **\%** & **\%** & **\%** & **\%** & **\%** & **\%** & **\%** & **\%** & **KJ/Kg** & **\%** \\ \hline Clean feathers & 58.2 & 8.5 & 8.7 & 4.8 & 13.3 & 2.6 & 92.3 & 6.2 & 1.5 & 20,759 & 65.6 \\ \hline Poultry bones & 47.2 & 6.9 & 6.1 & 3.3 & 28.2 & 2.2 & 72.1 & 21.8 & 6.1 & 19,780 & 54.7 \\ \hline \hline \end{tabular}  
* Percentage on a dry basis; ** obtained by difference.  
\end{table} 
Table 1: Proximate and ultimate analysis of the selected wastes from the poultry sector. Figure 5: Soil tillage utilizing the compartmentalized furrow method with specialized equipment: (**a**) equipment-construction diagram; (**b**) illustration of compartmentalized furrows on sandy soils; (**c**) agricultural aggregate elements: 1—aggregate supporting wheel; 2—frame; 3—gripping triangle; 4—chiest-type scarifier; 5—transmission wheel; 6—chain mechanism; 7—camshaft bracket; 8—locking component; 9—rotor blade; 10—camshaft assembly; 11—spring pressure mechanism; 12—actuating lever; 13—rotor bearing; 14—camshaft axle. Figure 6: Mixture of chopped feathers and bones after thermochemical processing: (**a**) samples collected at various processing temperatures; (**b**) biochar prepared for use as a soil amendment. Pyrolyzing chicken feathers at varying temperatures produces different proportions of char, tar, and gas, an analysis critical for optimizing biochar production strategies suited to agricultural applications. Figure 7 presents distribution rates of the main reaction products, obtained from the pyrolysis of poultry feathers at different temperatures, an analysis that helps to identify the most suitable processing regimes. Char production is considered the primary output for agricultural use. It can be seen that char production decreases as pyrolysis temperature increases. At lower temperatures (300-500 \({}^{\circ}\)C), char yield remains relatively high at approximately 30-40% but declines sharply to below 20% as temperatures reach 700-800 \({}^{\circ}\)C. Between 300 and 500 \({}^{\circ}\)C, the evolution of the gas fraction is semi-constant. This corresponds to the stage of release of volatiles from the solid-gas phase from the solid matrix of the product. After 500 \({}^{\circ}\)C, heavy hydrocarbons are produced and the pyrolysis gas fraction decreases continuously until reaching the minimum value of 45% at a temperature of 700 \({}^{\circ}\)C. The tar fraction is maximum at the same temperature of 700 \({}^{\circ}\)C--40%.