Using Deep Convolutional Neural Networks for Image-Based Diagnosis of Nutrient Deficiencies in Rice

Table 3

Standards and methods followed to analyze nutrient contents in rice plants.

Nutrient	Standard	Method	Reference
N	HJ 636-2012	Alkaline potassium persulfate digestion UV spectrophotometry	[45]
P	GB/T 11893-1989	Ammonium molybdate spectrophotometry	[46]
K,; Ca, Mg, Mn, and Fe	GB 5009.268-2016	Inductively coupled plasma mass spectrometry	[47]
Zn	GB 5009.268-2016	Inductively coupled plasma mass spectrometry	[47, 48]
S and Si	HJ 776-2015	Inductively coupled plasma optical emission spectrometry	[49]