Organic And Inorganic Fertilizer Essay
Effect of Varying Rates of Organic and Inorganic Fertilizers on Growth, Yield and Nutrient Use Efficiency of Clonal Tea (Camellia Sinensis L. [O] Kuntze)
Bitange, N Mokaya1., Mogeni H.I1 1 University of Nairobi, Department of Crop Protection and Plant Science, College of Agriculture and Veterinary Sciences. P. O. Box 29053 00625 Kangemi, NAIROBI.
Corresponding author. Bitange N M. mokayanaphis@gmail.com
ABSTRACT
The effect of varying rates of organic Rutuba and inorganic NPK fertilizers on the soil chemical properties, growth, yield and nutrient use efficiencies of clonal tea (Camellia Sinensis) was studied. The treatments comprised: control (no fertilizer), 625 kg NPK/ha, 937.5 kg NPK/ha, 1875 kg NPK/ha, 625 kg Rutuba/ha + 625 kg NPK/ha,
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The length and width of the second leaf were taken using a ruler and the average length and width recorded for each plot 20 times in duration of 7-10 days.
4.1.4 DETERMINATION OF YIELD
The tea was plucked by hand two weeks after fertilizer application using the standard method of harvesting two leaves and a bud at an interval of 7-10 days of 20 harvests. The plucked leaves were weighed and data recorded and converted to made tea (kg/ha/year) using the equation below (Sitienei et al., 2013). Made tea refers to the form of tea obtained after the harvested shoot have gone through the manufacturing processes i.e. withering, fermentation and drying (De Costa et al., 2007). Made tea yield/ha/year = N*a*0.225 b
Where: a is the plant population per hectare, N is the green leaf yield per plot, b is the number of tea bushes per plot and 0.225 is the factor converting green leaf to made tea.
4.1.5 NUTRIENT USE EFFICIENCIES
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