citation
Njeru, J.; Schulte-Geldermann, E.; Ochieng, B.; Ouma, E. 2013. Soil and potato nitrogen status and use of SPAD meter in nitrogen management in Kenya. Transforming potato and sweetpotato value chains for food and nutrition security. 9. Triennial Congress of the African Potato Association. Naivasha (Kenya). 30 Jun - 9 Jul 2013.