Kelussia odoratissima Mozaff. is a medicinal species native to Iran. The goal of this research was to determine the environmental factors important for the distribution of K. doratissima in Iran using BMLR modeling. Six random transects were established throughout the species’ habitat, and 220 quadrats with an area of 4 m² were plotted. The canopy cover percentages of K. doratissima were estimated in each quadrat. Topographic factors, including elevation, slope, and aspect maps, were generated by creating DEM images. Land use, land evaluation, evaporation, temperature, and precipitation maps of the area were created accordingly. The data collected from the experiments were analyzed using the Minitab and R statistical packages. To determine the effect of the studied factors in the distribution of K. doratissima, we ran a set of backward multiple linear regressions. The results showed that the effects of evaporation, elevation, and slope were significant in the species’ distribution, with elevation having a positive effect and evaporation and slope showing negative effects. Further, elevation had the highest effect on distribution (greatest absolute value of beta at 9.660). The next most significant factors in the plant’s distribution were evaporation (beta = 8.282) and slope (beta = 0.807), respectively.

Despite direct seeding, seed pelletizing with useful materials is one of the effective methods to improve plant growth. This experiment assessed the impacts of different additives used in seed pelletizing on germination and growth of Onobrychis viciifolia at a degraded semi‐arid rangeland. Seed pellets were prepared for the 16 treatments, which included 14 amendments (seven additives at two 10% and 20% concentration levels) and two controls (a clay‐only pellet and direct seeding). After the planting, germination indices and growth traits were recorded and analyzed. A completely randomized design was considered in planting experiment using 12 seedballs as replications per treatment. The results revealed that corn starch 20% treatment had the lowest value for growth and germination, while the livestock manure 20%, sawdust 20%, ash 10%, and wheat straw 10% showed better germination indices. Based on the significance summation ranking method, sawdust was the most favorable amendment, enhancing root length by 23%, root weight by 234%, aerial biomass weight by 189%, and plant height by 31% compared to the direct seeding. The efficacy of seed pelleting over direct seeding was clearly demonstrated. Notably, seedballs prepared solely from clay, without any amendments, also showed acceptable performance in enhancing seed germination and plant growth. However, some of the used additives, such as ash, sawdust, and manure, were more beneficial than using clay alone in the seedball production. Seed pelletizing did not always have favorable results with all materials. For instance, additives such as starch, especially in high concentrations, had adverse effects.