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The pollination crisis of alfalfa (Medicago varia) in Estonia


, : The pollination crisis of alfalfa (Medicago varia) in Estonia. Transactions of the Estonian Agricultural University, Agronomy ( 203): 136-142

Estonia is one of the most northern areas of alfalfa seed production. The major problem for seed crops is the relatively low and annually fluctuating seed productivity, which is caused by poor pollination. Experiments were carried out using Medicago varia Jogeva 118 fields in Jogeva and Akste in 1984-89. Counts of honey bees and bumble bees were made three times per day from 12.00 to 15.00 h, twice a week throughout the flowering period.

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