Yield predictions for Jatropha. (March 2014)
The jatropha industry is screaming for reliable yield data. Several breeding companies are advertising improved varieties, based on breeding and selection results, but reliable data based on year to year measurements are hard to get and it will become harder and harder along the road.
Because, until recent, most studies, business plans and articles were stating that Jatropha plants will reach maturity around year 5 and because there were no reliable data, it almost became a fact.
Recently the evidence is growing that the moment of Jatropha reaching maturity is much more variable, depending on lots of environmental factors like soil and rain and temperature and probably on gene characteristics as well.
This makes it very difficult to predict volume and time of yield, which is, however, essential for creating a reliable business plan.
Below I gathered the most reliable data both from publications , from verbal communications and own experience.
(black is measured yield, red is calculated)
|India.Joil best case*||0||2000||3500||4400||6000||6000||6000||6000||800||Reddy via personal com.2014||(JOIL)|
|India.Joil base case||0||500||1000||1500||2000||2500||3000||3500||500||Reddy via correspondence (JOIL)|
|Thailand.Quinvita||0||230||700||1530||3080||5240||5980||6370||720||(AvP, via Quinvita, 2013)|
|Vietnam (VBM)||0||165||1485||2200||4400||5500||6567||7634||1067||VBM publication|
|Mozambique (Viridesco)||0||0||500||1000||2000||3000||4000||4875||875||Viridesco presentation|
|Kenya (GTZ)*||0||6.66||141.61||198.25||793||991||1189||1427||Kenya reality check 2012|
|Various countries||0||750||1500||2250||3000||750||JatroSolutions website 2015|