Rapid Identification of Potassium Nutrition Stress in Rice Based on Machine Vision and Object-Oriented Segmentation

Table 5

Training accuracy of potassium status at different growth stages.

Growth stages	1^st leaf (%)	2^nd leaf (%)	3^rd leaf (%)
Productive tillering stage	74	90	90
Invalid tillering stage	86	88	94
Jointing stage	78	90	94
Booting stage	70	90	96