Research on Quantitative Evaluation of Remote Sensing and Statistics Based on Wireless Sensors and Farmland Soil Nutrient Variability

Table 7

Comparison table of the percentage of organic matter content in a certain area in three periods.

Organic matter content (%)/time	<10	[10–20)	[20–30)	[30–40]	>40
July 2, 2003	76.527	10.592	6.82	4.924	1.123
November 27, 2019	37.407	46.552	8.967	4.715	2.356
June 7, 2020	60.666	17.334	13.011	5.911	3.075