Effect of Mineral and Organic Fertilization on Growth and Flowering of Zinnia (Zinnia elegans)

The aim of this research is to determine the role of mineral (NPK) and organic fertilization (Chicken manure, Cow manure and Chicken with Cow manure) on vegetative growth and flowering of Zinnia (Zinnia elegans). This research also examines the possibility of relying on this organic manure to present nutrients for the plant in order to reduce mineral fertilization. The results show that the use of NPK (30, 20, 20 g/m2) or Chicken manure (2Kg/m2) has a positive impact on vegetative growth (plant height and average number of branches andleaves on the plant). They also show a positive effect on the flower developmentand flowering (early flowering, number of flowers and flower volume). These positive effects are reflected on the proportion of dry matter both in the vegetative and flowering part. The results indicate that plants fertilized with NPK or Chicken manure realize higher economic profit than the control and those fertilized with Cow manure.

Chilling Requirements of Pistachio. Determination of Chill Hours Required for Pistachio Variety Peters

The research trial was carried out at University of California, Davis, Agriculture and Natural Resources, Cooperative Extension–Kearney Agricultural Center (KAC). Part of the scientific work in the laboratory started from November 1, 2001 throughout the end of February 2002. This trial was conducted using Pistacia vera; the female variety ‘Kerman’ and its pollinator, variety ‘Peters’;… both are grafted on the rootstock UCB1.