Establishment of the Causal Agent(s) of Spike Shedding and Stem Wilting of Pepper (Piper nigrum L.) in Morogoro District, Tanzania

Table 2

Concentration of nutrient elements in mature pepper leaves.

Nutrient	Optimum value	Nyange hamlet	Doga hamlet	Tandai hamlet	Lukenge hamlet
N	1.65–2.79%	1.56^L	1.35^L	1.66^OP	2.15^OP
P	0.11–0.26%	0.09^L	0.07^L	0.11^OP	0.12^OP
K	1.78–2.84%	2.45^OP	0.76^L	2.73^OP	2.08^OP
Ca	1.42–3.33%	2.25^OP	2.87^OP	1.55^OP	2.17^OP
Mg	0.40–0.69%	0.56^OP	0.22^L	0.36^L	0.27^L
Fe	126–1145 ppm	387.48^OP	215.97^OP	400.18^OP	686.03^OP
Mn	109–721 ppm	197.38^OP	206.54^OP	406.98^OP	254.36^OP
Zn	21–67 ppm	47.56^OP	21.91^OP	23.30^OP	32.31^OP
Cu	16–120 ppm	16.70^OP	5.76^L	12.72^L	9.74^L

L, low; D, deficient; OP, optimum [39].