Wild solitary bees have been found to increase crop yields by at least 30% according to research. The Agro-Soyuz farm in Ukraine saw a yield of up to 11.0 c / ha from alfalfa using wild bees for pollination, compared to the average of 1 c / ha without. The efficiency of wild bees is greater than honey bees, with one bee pollinating 3-5 times more flowers. However, the population of pollinating insects in Ukraine is declining due to land plowing, urbanization, and hostilities, including the war causing damage to apiaries.