## 3 Research Model Design
### Measurement of China's Agricultural Green Development Level
#### 3.1.3 Inspection of the Indicator System for Measuring the Development Level of Agricultural Green  
(1) Single-element inspection  
Single-unit testing is used to analyze individual indicators from the perspective of operability, accuracy and authenticity so as to ensure that the obtained indicator data are true and reliable. First, for the available data, the data sources were selected from the China Agricultural Yearbook, China Statistical Yearbook, China Forestry Statistical Yearbook, China Environmental Yearbook and China Water Conservancy Statistical Yearbook. Second, in addition to the existing statistical yearbook data, there were still a few indicators that needed to be measured. The specific indicators are explained in Table 1. Finally, during data collection, some provinces were found to have missing data for certain indicators. In this case, calculation methods such as linear interpolation and the mean filling method were selected to ensure the integrity of the agricultural green measurement indicator data. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**First-Level** & **Secondary Indicators** & **Unit of Measurement** & **Indicator Type** & **Interpretation of Indicators** \\ \hline \multirow{6}{*}{Economic and social development} & Agricultural GDP output value per unit area & \(\text{CNY}/\text{hm}^{2}\) & Positive & Agricultural GDP output value/sown area of crops \\ \cline{2-5}  & Per capita disposable net income of farmers & \(\text{CNY}/\text{person}\) & Positive & Farmers’ total income per capita minus various expenditures per farmer \\ \cline{2-5}  & Per capita grain production & kg/person & Positive & Total food production/total population \\ \cline{2-5}  & Per unit area yield of grain & kg/\(\text{hm}^{2}\) & Positive & Food production/area of arable land \\ \cline{2-5}  & Total power of agricultural machinery & Ten thousand kW & Positive & Agricultural machinery power + animal honesty and fishery machinery power \\ \hline \multirow{6}{*}{Resource-saving investment} & Fertilizer application intensity & kg/\(\text{hm}^{2}\) & Negative & Scalar amount of fertilizer application/sown area of crops \\ \cline{2-5}  & Intensity of pesticide use & kg/\(\text{hm}^{2}\) & Negative & Pesticide use/sown area of crops \\ \cline{2-5}  & Intensity of agricultural much use & kg/\(\text{hm}^{2}\) & Negative & Amount of agricultural film used/sown area of crops \\ \cline{2-5}  & Intensity of agricultural water use & m\({}^{3}\)/\(\text{hm}^{2}\) & Negative & Total water consumption/sown area of crops \\ \hline \multirow{6}{*}{Resource recycling} & Coefficient of effective use of chemical fertilizer & \(\text{CNY}/\text{kg}\) & Positive & Planting industry output value/scalar amount of chemical fertilizer application \\ \cline{2-5}  & Effective utilization coefficient of pesticide & \(\text{CNY}/\text{kg}\) & Positive & Planting industry output value/amount of pesticide use \\ \cline{2-5}  & Water-saving irrigation coefficient & \% & Positive & Water-saving irrigation area/total irrigation area \(\times\) 100\% \\ \cline{2-5}  & Cultivated land multiple cropping index & \% & Positive & Sown area of crops/area of arable land \(\times\) 100\% \\ \hline \multirow{6}{*}{Resource environmental friendliness} & Total agricultural chemical oxygen demand COD emissions & Ten thousand tons & Negative & Agricultural waste discharge \\ \cline{2-5}  & Total agricultural ammonia nitrogen emissions & Ten thousand tons & Negative & Agricultural waste discharge \\ \cline{1-1} \cline{2-5}  & Forest cover rate & \% & Positive & Forest area/total land area \(\times\) 100\% \\ \cline{1-1} \cline{2-5}  & Annual afforestation area & \(\text{hm}^{2}\) & Positive & Annual afforestation area \\ \cline{1-1} \cline{2-5}  & Proportion of area of nature reserves & \% & Positive & Area of natural resource protection area/area of jurisdiction \(\times\) 100\% \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Indicator system for measuring the development level of green agriculture.