Page 90 - rise 2017

Potassium Content
Based on the initial concentration of the fertilizer, the final concentration was calculated. From the
results, 50:50 ratio of rice straw and tea waste has lowest concentration (0.027g/l) while the 70:30
ratio has highest amount of concentration (0.057). Potassium is a highly mobile element in the plant
and is translocated from the older to younger tissue. Consequently, potassium deficiency symptoms
usually occur first on the lower leaves of the plant, and progress toward the top as the severity of the
deficiency increases. One of the most common signs of potassium deficiency is the yellow scorching,
or firing (chlorosis), along the leaf margin. In severe cases, the fired margin of the leaf may fall out.
However, with broadleaf crops, the entire leaf may shed, resulting in premature defoliation of the
crop.

Table II
The Results of Concentration for Fertilizer Samples
AVERAGE
RATIO BINS CONCENTRATION
(g/L)
A 0.056
70:30
B 0.06
A 0.04
30:70
B 0.03
A 3.44
50:50
B 3.17

Figure 3 shows the height of the Spinach plants S. Oleracea. The X-axis shows the number of days
the reading taken which are 30 days. The Y- axis show the height of the plants (cm) taken by using a
long ruler. The reading of the 50:50 ratio clearly shows the height of the plants increased enormously
then the other two ratios. The reading for the 30:70 shows slightly increased than the 70:30 ratio
plants. The tallest reading of the height of the S. Oleracea plants was 43.1 cm which was from the
50:50 ratio and the shortest reading of the height of the S. Oleracea plants was 22.1cm which was
from the 70:30 ratio.

Figure 3: The Average Reading of the Height of Spinach Plants S. Oleracea for the 3 Different
Ratios.
Conclusion