The purposes of this research are to analyze and to identify the factors influencing the farmers’ Willingness to Pay (WTP) in reducing the impact of the critical land. The research method used to calculate the farmers’ WTP on the land restoration is the Willingness to Pay (WTP) Method, and The Ordinal Logistic Regression Method is used to analyze WTP’s influencing factors. The result showed that the farmers’ average of maximum WTP was IDR 21,196. This means that the farmers’ average of maximum WTP is lower than the average cost incurred by the farmers for the land restoration activity that was IDR 58,000. This indicated the low of farmers’ awareness in the efforts of doing critical land restoration. The independent variable with significant influence is the OWN (status of the land ownership) variable. The other variables that are positive and significant are income, age, education, long stay, and family numbers. The significant variables with negative impact are marital status, occupation, and land restoration activity. In general, farmers thought that the activities of repairing the degraded land were the role of the government. So that the efforts of farmers in recovering land are almost non-existent.

Majority of agricultural activity in Indonesia still relies on rainwater for irrigation. In the dry season, there are many non-productive agricultural lands. It leads to decrease in farmers’ income. To solve this problem, Aquaponic Planting System was offered, but the system is complicated. It needs adequate oxygen and proper pH to make nitrification bacteria alive to convert NH3 to NO3- and NO2. Therefore, a system which controls oxygen and pH is needed. For pH calibration, a curve fitting method was used to get an accurate measurement. For oxygen calibration, saturated dissolved oxygen water was used. It was obtained using a Potentiometric method. Moreover, Simple Moving Average was used to get a stable reading.

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This study was conducted in order to find the effect of community socioeconomic conditions on farmers' Willingness To Pay (WTP) and farmers' willingness to move to lands that were not critical or to better land areas (Willingness To Leave / WTL). The research method used to calculate the farmers' willingness to pay the land restoration is the WTP Method, and Ordinal logistic regression analysis is used to determine the influencing factors to the opportunities of the critical land recovery activities. From the results of the study, the efforts to recover critical or degraded land are still low. Farmers of the study respondents has only carried out the fertilization process, and they even used the land over the land productivity. The factors that have a significant effect to the possibility of WTP for the land recovery is the long stay variable. Whereas the significant effect to the WTL model is the income variable.

The purpose of this study is to characterize the physical, chemical, and biological properties of Sukosari land. The research was conducted via survey, evaluating the soil properties in agricultural areas to obtain 12 points at various altitudes. The results indicated that sand made up the most significant percentage of texture, ranging from 56 to 67 %. The analysis results of the soil's degree of acidity (pH) indicate that it is acidic, ranging between 4-5. The analysis of soil organic carbon, nitrogen, phosphorus, and potassium yielded low values. The total number of bacteria and fungi in the soil, on the other hand, is relatively high. As a result, it can be concluded that Sukosari's soil fertility is still relatively low. Additionally, it is recommended that the microorganisms present in each type of soil and land use Sukosari are identified.