International Journal of Agronomy

Research Article

Rhizome Yield of Sweet Flag (Acorus calamus L.) as Influenced by Planting Season, Harvest Time, and Spacing

Table 5

Growing degree days (GDDs) and photo thermal units (PTUs) accumulation of Acorus calamus (sweet flag) as influenced by staggered harvesting over two seasons and years.
Harvest timeGDD from planting to harvestingPTU from planting to harvesting
RainyAutumnRainyAutumn
2006-20072007-2008Mean2006-20072007-2008Mean2006-20072007-2008Mean2006-20072007-2008Mean
At 7th month391136703791400839393974468314400345417496124879349202
At 8th month436541224244470546724688517504889650323588095845558632
At 9th month484645484697541153995405571805370955444677876769267740
At 10th month547652215349609660936095646986174463221760777607476075
At 11th month624459806112671467346724743527129472823831498340683277
At 12th month710668656985720872637235856398289184265885388917388855
Mean532550685196569056835687634096042361916706627059970630