Abstract: Cattle manure and mineral fertilizers are two source
of Nitrogen, which can affect the growth and quantity of potato. In
this research the effects of the use of cattle manure (5, 10, 15 and 20
ton ha-1), Nitrogen fertilizer (50, 100 and 150 kg N ha-1) and their
interaction on potato growth were evaluated during field
experiments in 2008 with the help of Randomized Complete Block
(RCB) with the factorial arrangement of three experimental
replications in Iran. At the 75 th day after emergence, dry weight of
Shoots, leaf area index (LAI) and plant height were recorded. Results
showed that, dry weight of Shoots, LAI and plant height increased
linearly and very significantly in response to the application of
manure and Nitrogen fertilizer. While the interaction between
manure and Nitrogen fertilizer just on the LAI and plant height was
significant, somehow the maximum amount of plant height( 73 cm)
was obtained by using 150 kg Nitrogen + 15 tons of manure per
hectare, and maximum LAI ( 5.36) was obtained by using 150 kg
Nitrogen + 20 tons of manure per hectare. Also in this experiment
maximum tuber yield (36.8 tons ha-1) was obtained by the utilization
of 150 kg Nitrogen per hectare + 20 tons manure.
Abstract: The main objective of this study was to determine the effects
of vermicompost and amino acids on the qualitative and quantitative yield of
chamomile. The experiment was conducted during the growing season of
2010 at the Alborz Medical Research Center. The Treatment groups consisted
of vermicompost (0, 5, 10, 15 and 20 tons/ha) and the sprays of amino acids
(budding stag, flowering stage, and budding + flowering stage). The
experimental design was a factorial experiment based on Randomized
Complete Block Design (RCBD) with three replications. The present results
have shown that the highest plant height, flower head diameter, fresh and dry
flower yield and significant essential oil content were obtained by using 20-
ton vermicompost per hectare. Effects of amino acids were similar to those
seen in vermicompost treatment and all measured traits were seen to be
significant after the spray of amino acids at the budding + flowering stage).