Page 89 - rise 2017

Table I
Nitrogen Concentration in Three Different Ratios of Liquid Fertilizer
AVERAGE CONCENTRATION
RATIO
(g/L)

70:30 6.75
30:70 3.24
50:50 3.73

50:50

30:70
70:30

Figure 1: Difference Growth of Spinach Plants.

Phosphorus Content
The readings of each fertilizer sample ratio were triplicated to ensure a valid result obtained. The
average concentration of the different ratio of sample was calculated. The initial reading of rice straw
is 34.64 g/L and tea waste is 7.97 g/L which is higher based on the graph. This is because both the
rice straw and tea waste is in a pure form. The average concentration of phosphorus in 70:30, 50:50
and 30:70 ratios of rice straw and tea waste are 1.31 g/L, 3.31 g/L and 5.11 g/L respectively. Although
there are different concentrations of phosphorus in different fertilizer ratios sample, the amount of
NPK which is phosphorus is just one of the factor of growth of the plant.