A novel framework for groundwater quality evaluation in industrial zone using unsupervised machine learning methods.

Environmental problems associated with the inappropriate use of fertilizers by rural smallholders are a growing concern in many countries. This paper contributes to the literature by examining whether risk preferences, time preferences, and personality traits are related to farmers’ use of synthetic and organic fertilizers. We rely on survey data collected from 815 farm households in three rice-producing provinces in eastern China in the empirical analyses. Results of OLS and rare events logistic regressions indicate that risk-seeking and patience are positively associated with the application of organic fertilizer in rice production but not with the intensity of synthetic fertilizer use. There is also no significant association between personality traits and (synthetic or organic) fertilizer use. In addition, personality traits do not mediate nor moderate the associations between economic preferences and fertilizer use. Robustness analysis using the two-stage probit least squares (2SPLS) model not only supports these findings, but also suggests that organic fertilizers complement the use of synthetic fertilizers and are only sporadically used in Chinese rice production. The insights gained in this study can provide important inputs for designing policies aimed at promoting sustainable agricultural intensification in China and elsewhere.

Excessive use of synthetic fertilizers causes a decrease in soil fertility, which can reduce crop production. Making liquid organic fertilizer (POC) from vegetable and fruit waste can reduce the use of synthetic fertilizers and support sustainable agriculture. The Golo Curu Permai farmer group has never implemented sustainable agriculture. This activity aims to reduce synthetic fertilizers' use to support sustainable agriculture and increase the knowledge and skills of farmer groups in producing liquid organic fertilizers independently. This activity was carried out at the Golo Curu Permai farmer group in Karot Village, Langke Rembong District, Manggarai Regency, with a total of 15 participants and through activity methods in the form of coordination and field surveys, extension, training or demonstration and evaluation. Evaluation is carried out by analyzing the initial test results before training (pre-test) and after training (post-test). The results of this activity show that the knowledge and skills of farmer groups after participating in training in making POC from organic waste increased by 30% from 50% to 85%.

Developing a decision support tool for evaluating the environmental performance of olive production in terms of energy use and greenhouse gas emissions

The Maharagama urban area is located in Colombo district, Western province (79052‟E – 6050‟N and 79056‟E - 6053‟N) in Sri Lanka. It carries a high population density about more than 1600 km -2. Groundwater in this area is having a great vulnerability for pollution by anthropogenic activities such as excessive use of fertilizers and unregulated garbage dumping directly impact on ground water quality. The present study was carried out to study some important water quality parameters, to evaluate the quality of groundwater in the area using a Water Quality Index (WQI) and to compare the water quality between Grama Niladari (GN) divisions in the study area. Five GN divisions (Jambugasmulla, Gangodawila south B, Wijerama, Navinna and Wattegedara) in Maharagama urban area were selected and the study and fifty five wells were sampled once in three months for a period of nine month from November 2010 to July2011. Physico-chemical and microbiological parameters were measured and WQI was calculated for each well using twelve physico-chemical parameters including total alkalinity, hardness, conductivity, pH, chloride, nitrate, total phosphate and five heavy metals (Cd, Cu, Zn, Fe and Pb). First, a weight value was assigned for each of the twelve parameters depending on their relative importance. The maximum weight (5) has been assigned to parameters with major importance. The SLSI drinking water standards were used as a reference in calculations. Water quality classification based on WQI value of 50-100, 100-200, 200-300, >300 reference to excellent, good, poor, very poor and water unsuitable for drinking respectively. Microbiology parameters were considered separately. The resulted WQI values in groundwater ranged from 17.08 to 280.91. The results revealed that the water quality of the wells deviate from excellent to very poor quality. The nitrate concentration of some wells exceed more than >45mg/l and other physic-chemical parameters remained with the SLS water quality standards. Considering all the water quality parameters, the poorest water quality was recorded in Navinna GN division where located around Navinna garbage dumping site. Almost all tested dug wells were contaminated with fecal coliform and E. coli. In certain wells the fecal coliform counts were exceeded more than1100/100ml. It was observed that unregulated garbage dumping, uncontrolled application of organic and inorganic fertilizers, constructing toilet pits very close to wells and increasing human settlements in the study area positively effect on poor ground water quality of the area. Key words: ground water quality, nitrate, E.coli, anthropological activity

The application of synthetic nitrogen (N) fertilizers has boosted crop yields globally. However, it has also imposed on environmental pollution problems. An estimation of actual fertilizer N inputs at the crop field level is needed to establish effective N management plans to control groundwater NO3-N contamination. Here, a survey to collect the types of cultivated crop and fertilizer application rate was conducted during 2016–2018, covering 44,253 small crop fields (7730 ha) in the western part (Hanrim and Hankyung regions) of Jeju Island, South Korea. Foreign vegetables, citrus fruits, and bulb vegetables are the major crop types grown in the total cultivated areas of 2165.6 ha, 1718.7 ha, and 944.9 ha, respectively. For several crops (green garlic, potato, and chives), the over-use of N fertilizers is observed, the amount of which is 1.73–4.95 times greater than the standard fertilizer application rate. The highest level of fertilizer N input is observed for bulb vegetables in both the regions (Hanrim: 500.5 kg/ha, Hankyung: 487.1 kg/ha), with nearly 80% of the N fertilizer input turned into surplus N loading. A comparison between a spatial interpolation map of the fertilizer N input and that of the groundwater NO3-N concentration implies that the excessive use of synthetic fertilizer results in the degradation of groundwater quality by NO3-N. N management plans for the study area are suggested based on the N fertilizer input at the crop field level. This study highlights that sustainable N management plans should be arranged at the crop field level, considering the spatial heterogeneity of N fertilizer use.

This study employed the groundwater pollution index to assess the appropriateness of groundwater for human consumption. Additionally, the hazard index was utilized to evaluate the potential non-carcinogenic risks associated with fluoride and nitrate exposure among children, women, and men in the study region. A total of 103 samples were collected from the Aurangabad district of Bihar. The analyzed samples were assessed using several physicochemical parameters. Major cations in the groundwater are Ca2+ > Mg2+ and major anions are HCO3- > Cl- > SO42- > NO3- > F- > PO43-. Around 17% of the collected groundwater samples surpassed the allowable BIS concentration limits for Nitrate, while approximately 11% surpassed the allowed limits for fluoride concentration. Principal component analysis was utilized for its efficacy and efficiency in the analytical procedure. Four principal components were recovered that explained 69.06% of the total variance. The Hazard Quotient (HQ) of nitrate varies between 0.03-1.74, 0.02-1.47, and 0.03-1.99 for females, males, and children, respectively. The HQ of fluoride varies between 0.04-1.59, 0.04-1.34, and 0.05-1.82 for females, males, and children, respectively. The central part of the district was at high risk according to the spatial distribution maps of the total hazard index (THI). Noncarcinogenic risks due to THI are 47%, 37%, and 28% for children, females, and males, respectively. According to the human health risk assessment, children are more prone to getting affected by polluted water than adults. The groundwater pollution index (GPI) value ranges from 0.46 to 2.27 in the study area. Seventy-five percent of the samples fell under minor pollution and only one fell under high pollution. The spatial distribution of GPI in the research area shows that the central region is highly affected, which means that this water is unsuitable for drinking purposes.

Pollution characteristics and health risk assessment of heavy metals in the vegetable bases of northwest China

The vegetable crop cultivation in Polewali Mandar Regency has a great opportunity due to the high market demand for vegetable products. Environmental issues are a global concern for the competitiveness of agricultural products. The quality of organic agriculture or environmentally friendly product has become a concern for consumers regarding food safety, health, and long-life habituation . The farming community in Galung Lombok village, Tinambung District, Polewali Mandar Regency depends highly on the use of synthetic chemical fertilizers and pesticides. On the other hand, harvest waste, household waste and coconut water as a byproduct of coconut processing have not been utilised effectively. Thus, this community service program aimed to utilise household organic waste as organic fertiliser and utilise coconut water as plant growth hormone; as well as educate farmers in implementing environmentally-friendly agricultural businesses. The method used were counselling, training, discussion and demonstration to 25 farmers. The program was able to increase the motivation and knowledge of farmers to implement the cultivation of environmentally friendly vegetable crops by using organic fertilizer from household waste and ZPT from coconut water. The vegetable crop cultivation in Polewali Mandar Regency has a great opportunity due to the high market demand for vegetable products. Environmental issues are a global concern for the competitiveness of agricultural products. The quality of organic agriculture or environmentally friendly product has become a concern for consumers regarding food safety, health and long-life habituation . The farming community in Galung Lombok village, Tinambung District, Polewali Mandar Regency depends highly on the use of synthetic chemical fertilizers and pesticides. On the other hand, harvest waste, household waste and coconut water as a byproduct of coconut processing have not been utilised effectively. Thus, this community service program aimed to utilise household organic waste as organic fertiliser and utilise coconut water as plant growth hormone; as well as educate farmers in implementing environmentally-friendly agricultural businesses. The method used were counselling, training, discussion and demonstration to 25 farmers. The program was able to increase the motivation and knowledge of farmers to implement the cultivation of environmentally friendly vegetable crops by using organic fertilizer from household waste and ZPT from coconut water.

In recent years, premium private labels for fresh produce grown with reduced use of synthetic pesticides and chemical fertilizers have been developed by Japanese general merchandise stores. In this paper, the brand equity factors that affect willingness to pay (WTP) for private label vegetables are identified using the contingent valuation method. We consider four key dimensions of brand equity, namely brand awareness, brand loyalty, perceived quality, and brand associations. We find that brand loyalty factors based on the psychology of consumers who seek value‐added vegetables with health and safety characteristics have the largest effect on the WTP premium. Providing shoppers with clear information about the key product attributes of reduced use of synthetic pesticides and chemical fertilizers is particularly important to generate brand equity for private label vegetables. [EconLit citations: Q130, M310].

Beef is the most resource intensive of all commonly used food items. Disproportionate synthetic fertilizer use during beef production propels a vigorous one-way factory-to-ocean nutrient flux, which alternative agriculture models strive to rectify by enhancing in-farm biogeochemical cycling. Livestock, especially cattle, are central to these models, which advocates describe as the context most likely to overcome beef’s environmental liabilities. Yet the dietary potential of such models is currently poorly known. Here, I thus ask whether nitrogen-sparing agriculture (NSA) can offer a viable alternative to the current US food system. Focusing on the most common eutrophication-causing element, N, I devise a specific model of mixed-use NSA comprising numerous small farms producing human plant-based food and forage, the latter feeding a core intensive beef operation that forgoes synthetic fertilizer and relies only on locally produced manure and N fixers. Assuming the model is deployed throughout the high-quality, precipitation-rich US cropland (delimiting approximately 100 million ha, less than half of today’s agricultural land use) and neglecting potential macroeconomic obstacles to wide deployment, I find that NSA could produce a diverse, high-quality nationwide diet distinctly better than today’s mean US diet. The model also permits 70%–80% of today’s beef consumption, raises today’s protein delivery by 5%–40%, and averts approximately 60% of today’s fertilizer use and approximately 10% of today’s total greenhouse gas emissions. As defined here, NSA is thus potentially a viable, scalable environmentally superior alternative to the current US food system, but only when combined with the commitment to substantially enhance our reliance on plant food.

We explored the relationships between synthetic fertilizer use, yield, and ecosystem services in a coffee agroecosystem in the Tarrazú region in the central highlands of Costa Rica. Working in nine farms ranging from 0.3 to 2.7 ha in the CoopeTarrazú farmers' cooperative, we focused on two important indicators of ecosystem services: biological control agents and mycorrhizal fungi. Biological control agents (especially parasitoid wasps) are essential for population regulation of herbivorous arthropods that reside in coffee agroecosystems. Mycorrhizal fungi contribute to plant nutrition and disease resistance and produce a highly stable protein, glomalin, which is critical for soil aggregation. Soil aggregates hedge against erosion, particularly in sloping soils, by improving porosity. Slopes in this study ranged from 4% to 66%. We manipulated synthetic fertilizer levels in experimental plots ranging from 6.9% increase to 53.3% decrease in total N relative to control plots that received a standard amount of fertilizer. The effects on coffee yields, soil glomalin production by mycorrhizal fungi, and wasp diversity were examined. Yield and glomalin decreased, but parasitoid diversity increased with greater reductions in fertilizer application six months after application. Reducing fertilizer use may bolster biological control assemblages, while glomalin is more directly dependent on plant production.

Sustainable farming systems provide food for humans while balancing nutrient management. Inclusion or exclusion of livestock has nutrient management implications, as livestock produce food from otherwise inedible crops and their manure is a valuable soil conditioner. However, plant‐based diets are becoming more widespread due to perceived environmental benefits. We measure both food production in terms of nourishment to humans (in this study measured by protein, fat, starch and sugar production) and nutrient sustainability in terms of fertiliser use of six rotational farming systems with differences in nutrient management approaches. The arable practices included were the application of synthetic fertilisers, a range of organic amendments, incorporation of crop residues and legume cultivation. Livestock and associated products were included in some systems but excluded in others. The production of protein, fat, starch and sugar was combined with the balance of nitrogen (N), phosphorus (P) and potassium (K) into an overall measure of nutrient use efficiency of human macronutrient production. Across all systems considered, N use efficiency (5–13 kg protein/kg applied N) was lower than P (84–772 kg protein/kg applied P) or K (63–2060 kg protein/kg applied K), and combining synthetic fertiliser use with organic amendment applications raised production significantly while balancing P and K management, regardless of which organic amendment was used. Legume‐supported rotations without livestock produced more protein, starch and sugar per unit area than those with livestock. Nutrient balances and nutrient use efficiencies were more sensitive to management changes than purely food production. Using this approach allowed us to identify areas for improvement in food production based on the specific nutritional value of offtakes as opposed to yield overall.

Biofertilizers: A Nexus between soil fertility and crop productivity under abiotic stress

Ethiopia’s economy has been significantly influenced by agriculture. However, it is unable to feed the nation’s expanding population. One of the most significant obstacles to improving food production in Ethiopia is the declining soil fertility. Various development measures, including the intensification of agriculture using contemporary agricultural technologies, have been implemented to enhance the underwhelming performance of agriculture. One of the contemporary agricultural technologies introduced into Ethiopian agriculture is fertilizer, which helps smallholder farmers produce more effectively. Although there was a focus on promoting the use of these newly introduced technologies, exploratory findings showed that many farmers did not do so. Hence, this study aimed to review the different effects of organic and inorganic fertilizers on soil fertility and crop production, as well as their economic role in the country, specifically, the importance and value of organic and inorganic fertilizers, the significance of organic fertilizer application to enhance crop production, and the constraints of organic and inorganic fertilizers that affect farmers or users. Regarding soil health, balancing the use of organic and inorganic fertilizers can be beneficial for soil health and sustainable agriculture. Incorporating organic matter through composting and manure application improves soil structure and fertility over time, while judicious use of synthetic fertilizers can provide targeted nutrient supplementation when needed. Additionally, employing practices such as crop rotation, cover cropping, and soil conservation measures can further enhance soil health and minimize environmental impacts and as a result, it can optimize yields of crops.

Chapter 15 - Beneficial bacterial microbes and their role in green remediation