FIELD: agriculture. SUBSTANCE: method involves taking measurement of rainfall as the temperature of air gets higher than 10 C. The hydrothermal factor is calculated from the following equation: HTF = total annual rainfall (mm)/0.1 multiplied by sum of temperatures higher than 10 C. The crop is sown with this factor ranging from 4 to 8. EFFECT: higher seed yield. 1 tbl
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Authors
Dates
1994-06-30—Published
1989-10-25—Filed