Coffee Cultivation Research Articles

Financial Feasibility of Arabica Coffee Plantation Business Through Partnership Pattern in Solok Regency, West Sumatra

Lembah Gumanti District has the largest area of Arabica coffee in Solok Regency, with a production of 2588.8 tons in 2019. Some problems farmers face in developing Arabika coffee farming include a lack of knowledge of cultivation techniques and low selling price of coffee (cherry) beans at the farm gate. The Solok Radjo Cooperative emerged to solve farmers' problems and is willing to help develop Arabica coffee plantations in partnership. This study aims to: (1) describe the implementation of partnerships in Arabica coffee farming and (2) analyze the feasibility of arabica coffee farming with partnership pattern. A survey method was used involving 40 sample farmers selected using simple random sampling. Data analysis was carried out qualitatively to determine the implementation and benefits obtained by the partnering parties (farmers and Solok Radjo Cooperative). Quantitative analysis is intended to determine the financial feasibility of developing Arabica coffee with a partnership pattern. In the partnership system, the Solok Radjo Cooperative provides farmers assistance to use superior seeds, socialization of Arabica coffee cultivation and harvesting techniques, and willingness to buy coffee beans (cherry) from farmers with higher prices than local collectors. The benefit obtained by the Solok Radjo Cooperative is the guaranteed supply of Arabica coffee production with better quality. Arabica coffee plantation business through this partnership is feasible with a Net BC ratio of 2.43.

Utilization of Coffee and Aren Cultivation in Producing Non-Alcoholic Wine-Flavored Aren Coffee Products to Improve the Economy of the People of Kutalimbaru, Deli Serdang

This community service aims to utilize the cultivation of Coffee (Coffea Sp.) and Aren (Arenga Pinnata) plants in the manufacture of Aren Coffee with Non-Alcoholic Wine Flavor as an alternative to plants producing raw materials for innovative processed coffee products in Suka Makmur Village, Kutalimbaru District, Deli Serdang Regency, North Sumatra. The benefits obtained are increasing positive acceptance responses in the Suka Makmur Village community so that this area becomes an alternative for the use of coffee and aren Aren plants as raw material for coffee innovation products. Non-Alcoholic Wine Flavor which can be a new variant of coffee product innovation and increase people's economic income, as well as increase people's knowledge and skills on how to make Non-Alcoholic Wine-Flavored Aren Coffee. The result of the program is the achievement of many understandings and perceptions from the people of Suka Makmur Village who agree and are enthusiastic about becoming a center for the development and planting of coffee and sugar Aren plants. The formation of a technical team for making Non-Alcoholic Wine Flavored Aren Coffee to produce a mainstay product in Suka Makmur Village. The formation of an “IT” team that produces video tutorials and a marketing team (how to make Non-Alcoholic Wine-flavored Aren Coffee and how to cultivate coffee and sugar Aren plants, as well as sell products on social media). Producing ready-to-drink processed products of three in one size of 20 gr, 100 gr, 250 gr, 500 gr and 1000 grams for sale thereby increasing the community's economic income and planting from the availability of 1000 seeds of coffee and sugar Aren plants to the community so that the forest in Suka Makmur Village becomes productive forest.

ARABICA COFFEE PRODUCTIVITY IMPROVEMENT STRATEGY WITH VALUE CHAIN ANALYSIS APPROACH (CASE STUDY: SAPAN VILLAGE, NORTH TORAJA

Coffee is a farm commodity that has an important role in economic activities in Indonesia. The Indonesian coffee sector is dominated by small producers. North Toraja Regency, including in Sapan Village, is known as a producer of high quality coffee but low production. This study aims to examine the strategy of increasing coffee productivity in Sapan Village using value chain analysis. Data were collected through observation and interviews with cultivators in the value chain. This study shows that the productivity of coffee produced is still relatively low. The basic cause of low coffee productivity is that cultivation techniques are not good because information on good agriculture practices is still limited and there is a thought that the selling price of coffee is still low. To increase productivity, farmers need the role of the government. Farmers need counseling on coffee cultivation techniques that are in accordance with the application of GAP and price transparency from the government. If farmers have applied coffee cultivation techniques well, coffee productivity will increase so that farmers' income will also increase.

Development of Coffee Production in Kepahiang

The purpose of this study is to increase the income of coffee farmers in Kepahiang Regency, increase promotion and branding of coffee in Kepahiang Regency at the national and international levels, increase the knowledge of farmers and field workers about coffee cultivation technology farmers. This research includes descriptive research, which explains factual phenomena conceptually. The factual findings from the research are verified by existing theoretical concepts. The approach taken was a survey of a number of respondents who were selected based on certain criteria. The unit of analysis used in this study was coffee farmers, stakeholders, and related stake holders as well as the local government of coffee-producing districts, coffee business actors/traders in Kepahiang district. Optimizing the cooperation network, both the government and related stockholders; Optimizing priority programs for superior coffee production using special economic zones; Following up on the MOU with KPTIK and Bengkulu Provincial Government to make Bengkulu a national coffee area; Fighting for Bengkulu to get HAKi to increase regional competitiveness; Increased production of superior coffee already has sufficient value in the eyes of consumers;

KERAGAMAN TANAMAN DAN SUMBANGAN PENERIMAAN TUMPANGSARI KOPI DAN LADA DI KABUPATEN TANGGAMUS PROVINSI LAMPUNG

In Tanggamus, pepper trees are commonly intercropped in coffee plantations with coffee-pepper intercropping type (dominant coffee), coffee pepper type (dominant pepper), and agroforestry type. The intercropping system plays a role in improving agro-ecosystems, increasing farm productivity and income. This study aimed to study crops diversity, productivity and income of coffee-pepper intercropping farming. This study used a survey method. The survey locations were determined purposively in two sub-districts which were centers of coffee cultivation in Tanggamus, namely Ulu Belu and Air Naningan District. In the Ulu Belu District, the villages of Sinar Banten, Sinar Galih, Petai Kayu were selected purposively, and in the Air Naningan District were Datar Lebuay Village and Air Kubang Village. Primary data was collected by visiting plantations and interviewing farmers. Sample farmers were determined randomly with a total of 137 samples. The diversity of intercrops was analyzed by calculating the Benefit Index Value and Importance Value Index. The results showed that coffee plantations were generally intercropped (79-86%) with coffee and pepper. Based on the Importance Value Index, in Ulu Belu the most important intercrops were pepper, banana, avocado and cayenne pepper, while in Air Naningan they were pepper, jengkol, cayenne pepper and durian. The income of intercropping coffee farmers could reach IDR 24 million/hectare/year. This income was obtained from both the coffee-pepper intercropping or the coffee-non-pepper intercropping. The productivity of intercropping coffee ranged from 528-1,097 kg/hectare. The productivity of pepper intercrops ranged from 0.45-0.54 kg per tree and contributed 11-29% of coffee income.

Nitrous Oxide Emissions Generated in Coffee Cultivation: A Systematic Review

The objective of the research was to provide an overview of soil N2O emissions in coffee cropping systems; summarizing available field data on soil emissions and identifying controlling factors (fertilizer type, precipitation, temperature, altitude). A systematic search of Scopus, Science Direct, Springer, and Scielo for experimental-type studies was conducted from January 2000 to October 2021. Of the seventy manuscripts determined through the search strategy, eight studies met the inclusion criteria. Analysis of the included studies revealed that they were conducted in Ecuador, Costa Rica, and Nicaragua; the rainfall of the fields ranged from 910 mm to 2740 mm per year and the average temperature was 20.3°C. Coffee is planted under agroforestry systems and monocultures; in addition, the most abundant forest species in coffee agroforestry systems are leguminous plants of the Inga and Erytrina genus and 60% of the studies have been developed with the Catuai coffee variety. The pH and humidity of the soil where coffee plantations are developed range from 4.67 to 6.34 and 53.3 to 67.05% respectively. Finally, the fertilizers used are of chemical, organic, and chemical + polymer origin, at fertilization rates ranging from 66 to 400 kg.N.ha-1yr-1 and N2O emissions ranging from 0.2 to 12.8 kg.N.ha-1yr-1. Overall, the present systematic review provides a scientific basis for evaluating N2O emissions generated in coffee crops.

Implementation of the Corporate Social Responsibility (CSR) Program PT. Indonesia Power Kamojang Coffee Cultivation Activities in Maintaining Corporate Image and Community Based Economic in Pandemic Time

This study aims to analyze the implementation of the Corporate Social Responsibility (CSR) Program of PT. Indonesia Power Kamojang through Kamojang Coffee Cultivation Activities in Maintaining Company Image and Community-Based Economy in the Pandemic Period. This research uses a qualitative approach with a descriptive study. Data collection techniques were carried out through in-depth interviews, non-participant observation and documentation. Determination of informants by purposive sampling technique and informants consist of 3 key informants, and 6 supporting informants. Problem Identification, PT. Indonesia Power Kamojang held a Focus Group Discussion through social mapping with the result that coffee was the main commodity in the Kamojang area. Planning, the company organizes, interprets programs, and implements CSR programs. Communication, the company takes a communication approach through internal media to the group by providing direction, assistance with facilities, and holding training for the group. Communication barriers that occur are divided into personal, semantic, and technical barriers. For Evaluation, the internal process is carried out once a quarter, while the external evaluation is carried out once a year. The conclusion of this research is the CSR program of community-based Kamojang Coffee Cultivation, PT. Indonesia Power Kamojang can maintain its corporate image by actively participating in implementing social responsibility. Suggestions for this research PT. Indonesia Power Kamojang can improve the performance of CSR programs and have more opportunities to develop the potential of the surrounding area.

Robusta coffee leaf diseases detection based on MobileNetV2 model

<span lang="EN-US">Indonesia is a major exporter and producer of coffee, and coffee cultivation adds to the nation's economy. Despite this, coffee remains vulnerable to several plant diseases that may result in significant financial losses for the agricultural industry. Traditionally, plant diseases are detected by expert observation with the naked eye. Traditional methods for managing such diseases are arduous, time-consuming, and costly, especially when dealing with expansive territories. Using a model based on transfer learning and deep learning model, we present in this study a technique for classifying Robusta coffee leaf disease photos into healthy and unhealthy classes. The MobileNetV2 network serves as the model since its network design is simple. Therefore, it is likely that the suggested approach will be deployed further on mobile devices. In addition, the transfer learning and experimental learning paradigms. Because it is such a lightweight net, the MobileNetV2 system serves as the foundational model. Results on Robusta coffee leaf disease datasets indicate that the suggested technique can achieve a high level of accuracy, up to 99.93%. The accuracy of other architectures besides MobileNetV2 such as DenseNet169 is 99.74%, ResNet50 architecture is 99.41%, and InceptionResNetV2 architecture is 99.09%.</span>

Soil organic matter and nitrogen in varying management types of coffee-pine agroforestry systems and their effect on coffee bean yield

Abstract. Sudharta KA, Hakim AL, Fadhilah MA, Fadzil MN, Prayogo C, Kusuma Z, Suprayogo D. 2022. Soil organic matter and nitrogen in varying management types of coffee-pine agroforestry systems and their effect on coffee bean yield. Biodiversitas 23: 5884-5891. Coffee cultivation in agroforestry systems is mostly planted without soil fertility management. While there are several management interventions to improve soil quality in agricultural practices, it is not clear whether particular treatments, such as adding organic fertilizers and nitrogen fertilizers could increase coffee production in agroforestry settings. This study aimed to analyze soil organic matter and nitrogen in varying management types and its effect on coffee bean yield in a coffee-pine agroforestry setting in East Java, Indonesia. We evaluated four types of coffee management (treatments) namely: (i) no management, (ii) pruning coffee plant branches, (iii) a combination of pruning and addition of fertilizers with a planting distance of pine trees of 3 x 2 m, and (iv) pruning under pine trees with a planting distance of 6 x 2 m. The soil organic matter, total and available soil nitrogen were measured at 0-0.2 m and 0.2-0.4 m soil depths. We measured coffee bean yield to 100 coffee plants per plot. The coffee bean yield in the no-management treatment reached 376 kg ha-1, while the yield under the other three treatments increased up to 3.9 times compared with no-management. This increasing coffee bean yield did not correlate with soil organic matter in topsoil, with a correlation between coffee bean yield and total ant available soil nitrogen being positive and negative, respectively. We concluded that the limitation of N in the coffee-pine agroforestry system would require management intervention in the form of adding nitrogen fertilizers to increase coffee bean yield.

Microclimate and development of Coffea canephora intercropped with Carica papaya: measures to mitigate climate change

Intercropped systems with Conilon coffee might provide a better environment for coffee production. The aim of this study was to assess the microclimate and development of Conilon coffee intercropped with papaya trees. Papaya was planted with spacing of 3.20 x 2.40 m. The coffee trees were planted after eight months, with spacing of 3.20 x 1.60 m, in-between papaya trees (in the same row). The measurements were taken 0, 40 and 80 cm away from the coffee plants, both in the north and south direction. Concomitantly, an adjoining full sunlight coffee system (not intercropped) was also assessed. The measurements included atmospheric parameters (temperature, irradiance, and relative humidity) and vegetative parameters for the coffee plants (leaf area, relative chlorophyll index, length of plagiotropic branches, length of orthotopic branches and number of nodes) in three periods of the year. The intercropped system of Conilon coffee and papaya trees led to a decrease in both irradiance and temperature, and higher means of relative humidity during daytime in all the periods assessed, which contributes to a better environment for coffee cultivation. The shadow provided by papaya trees in the coffee plants contributed to a higher leaf area but did not affect neither the growth of both plagiotropic and orthotopic branches, nor the number of nodes and the etiolation. The intercropped system of Conilon coffee and papaya trees may be potentially used as a farming system to mitigate climate change.

Pemanfaatan Bubuk Kopi Sebagai Antimikroba pada Pembuatan Sabun

Coffee (Coffea spp. L.) is one of the annual plants cultivated in Indonesia and is included in the strategic category. One of the areas for developing coffee plantations in East Java Province is located in Jember Regency with the greatest potential in Pace Village. Robusta coffee cultivation in Pace Village is developed to the post-harvest stage. One of the post-harvest activities for robusta coffee developed by the Women Farmers Group (KWT) is product innovation. The purpose of this research is to create an innovative dish soap product made from robusta coffee powder as an output in the service of Real Work Lectures (KKN) in 2022. The method used in this study is a qualitative research method. Based on the results of the study, the presence of dish soap is the result of an agro-industrial product with a brown color and a slightly thick texture. The coffee product agroindustry is expected to improve the economy of the Pace Village community and increase the Pace community's ability to process coffee products so that they do not depend on coffee middlemen.

Genetic resources and product diversification in a transitioning coffee agroecosystem in Mecayapan, Veracruz, Mexico

Objective: To analyze a coffee agroecosystem undergoing an agroecological transition —considered as an alternative for the efficient use and the conservation of resources— through an agroecological association design with three legumes and one cucurbit in coffee cultivation. Design/Methodology/Approach: Collection and identification of genetic resources found in the agroecosystem; agroecological association design with three legumes and one cucurbit in a coffee crop; zig-zag soil sampling for physical, chemical, and biological analyses; data analysis using JASP software version 0.16.2. Results: We identified 42 weed species with various uses within the coffee agroecosystem, as well as the criteria for the association of species according to use. The soil analysis showed a significant correlation between micronutrients and nitrogen-fixing bacteria. The boron variable also influences the growth of such bacteria. Study Limitations/Implications: The results apply to the agroecological model in transition presented. Findings/Conclusions: Agroecological transition in coffee agroecosystems is slow but contributes to improving soil conditions. It also allows for the reappearance of usable weed species. There is a significant correlation between boron and the development of nitrogen-fixing bacteria. Likewise, the physical properties of soil have a direct impact on the growth of such bacteria

Effect of air blast sprayer application speed on the dye retention of coffee leaves

Improving the effectiveness of pesticide application for controlling insects, mites, and pathogens in coffee cultivation has been a major challenge for coffee farmers, researchers, and consultants. The present study aimed to assess the deposition and distribution of a brilliant blue tracer in the coffee canopy using Jacto’s Arbus 2000 Super Export EL and Kuhn’s Twister 2000 air blast sprayers at different application speeds (5 and 7 km h-1). The experiment was conducted using a randomized block design, with a 2 × 2 factorial arrangement (two sprayer models and two application speeds), with six replicates. After spraying, leaves were collected, and the deposition of the tracer was assessed using spectrophotometry. The canopy was divided into lower, middle, and upper heights, and subdivided into external and internal crown positions. The percentage difference in spray deposition between positions was termed relative spray deposition. Spray deposition in the internal crown differed only in the upper third section between sprayers. In the external crown, the application speed affected the deposition of tracer dye for both sprayers, whereas, in the internal crown, the application speed only affected the deposition of tracer dye in the upper crown section only when using the Arbus sprayer.

Characterization of Coffea arabica L. parent plants and physicochemical properties of associated soils, Peru

It is important to carry out the morphological characterization of coffee parent plants and the physicochemical properties of the associated soils in the Amazon region, Peru, in order to achieve germplasm conservation. One hundred coffee mother plants were identified and located in five provinces of the region and evaluated according to morphological descriptors such as stipula shape, young leaf color, leaf shape, leaf apex shape, young shoot color, leaf color, fruit color, fruit shape, mature leaf color, and rust incidence percentage. In the plots where the parent plants were located, soil sampling was carried out to determine the physical and chemical properties. The varieties with the greatest presence in the five provinces were Típica and caturra roja, with the greatest number of specimens reported for the province of Bagua. The predominant stipule shape was triangular (91%), lanceolate leaf shape (60%) and red fruit color (90%). Bongará reported the lowest incidence of yellow rust, as well as the Mundo Novo Rojo variety. Soil pH ranged from acidic to neutral values, low electrical conductivity, high organic matter content, low phosphorus content, high potassium levels and medium cation exchange capacity. The predominant textural class was sandy loam. The physical and chemical characterization of the soils under study show favorable ranges to encourage the best development of coffee cultivation.

Organic and bio-fertilizer inputs in coffee production system, coffee cultivation constraints and the role of coffee in coffee cultivation sectors: A review

Coffea arabica L. is the most traded commodity and the principal source of revenue for coffee cultivation sectors in Ethiopia and its market has been growing from time to time. With the demand changing, use and consumption of natural products has been growing, so there has been greater interest in research in this area. Added to this interest, is the concern of environmental impact caused by chemical inputs. Soil fertility management strategies for improving plant nutrients and crop productivity include the use of application of composts, vermicomposts and manures, and application of bio fertilizer or microbial inoculants. Bio-fertilizer technologies can contribute to efficient utilization of limited resource of phosphorus fertilizers under low-input farming systems and guarantee the environment for livelihood. Therefore, they are a good alternative for the so called perennial field crop production organically; because in addition to their numerous activities, they have low cost, and are sustainable, safe and effective. The application of efficient phosphate-solubilizing microbial inoculants in agriculture opens up new insight for future crop productivity besides sustaining soil health. The purpose of this review is to raise potential applications of organic and bio-fertilizer inputs in coffee production system to sustain organic coffee cultivation and to elucidate the main obstacles for yield reduction in the coffee production sectors. In this regard this review has also shown that phosphate-solubilizing microbes (PSMs) have tremendous potential as bio-fertilizers. This review also contains information on coffee consumption custom in Ethiopia and its role in cultural systems. Finally, this review focuses on relevant research performed and success in using bio-inoculants during the last decade that can help us improve sustainable coffee production.

Characteristics and Identification of the Metabolite Profile of Arabica Coffee Oil by Using the Gas Chromatography-Mass Spectrometry (GC-MS)

Indonesia is a tropical country that is suitable for coffee cultivation, and each coffee producing region has its own unique and distinct taste characteristics. This study aimed to determine the characteristics and identification of the metabolite profile of arabica coffee oil. The material used is coffee beans obtained from severals coffee Micro, Small, and Medium Enterprises (MSMEs) in Bukanagara Hamlet, Cupunagara Village, Cisalak, Subang-West Java. Coffee beans were roasted until medium to dark roast level. Coffee oil was extract from the ground coffee using n-hexane. Parameters to be observed included yield, specific gravity, acid number, peroxide number and identification of metabolite profiles by Gas Chromatography-Mass Spectrometry (GC-MS). The results of the study showed that arabica coffee oil had a yield of 9.43%, specific gravity of 0.94, an acid number of 0.78 mg NaOH/g and a peroxide number of 8.23 meq/kg. There was total 20 metabolite compounds identified in arabica coffee oil and based on the area of their distribution there are 11 compounds exist in high proportion. Keywords: Arabica coffee, Bukanagara, characteristics, GC-MS, metabolite profile.

Comparative genomic analysis and phylogeny of NAC25 gene from cultivated and wild Coffea species.

Coffee is a high value agricultural commodity grown in about 80 countries. Sustainable coffee cultivation is hampered by multiple biotic and abiotic stress conditions predominantly driven by climate change. The NAC proteins are plants specific transcription factors associated with various physiological functions in plants which include cell division, secondary wall formation, formation of shoot apical meristem, leaf senescence, flowering embryo and seed development. Besides, they are also involved in biotic and abiotic stress regulation. Due to their ubiquitous influence, studies on NAC transcription factors have gained momentum in different crop plant species. In the present study, NAC25 like transcription factor was isolated and characterized from two cultivated coffee species, Coffea arabica and Coffea canephora and five Indian wild coffee species for the first time. The full-length NAC25 gene varied from 2,456 bp in Coffea jenkinsii to 2,493 bp in C. arabica. In all the seven coffee species, sequencing of the NAC25 gene revealed 3 exons and 2 introns. The NAC25 gene is characterized by a highly conserved 377 bp NAM domain (N-terminus) and a highly variable C terminus region. The sequence analysis revealed an average of one SNP per every 40.92 bp in the coding region and 37.7 bp in the intronic region. Further, the non-synonymous SNPs are 8-11 fold higher compared to synonymous SNPs in the non-coding and coding region of the NAC25 gene, respectively. The expression of NAC25 gene was studied in six different tissue types in C. canephora and higher expression levels were observed in leaf and flower tissues. Further, the relative expression of NAC25 in comparison with the GAPDH gene revealed four folds and eight folds increase in expression levels in green fruit and ripen fruit, respectively. The evolutionary relationship revealed the independent evolution of the NAC25 gene in coffee.

Emergence and Incidence of Coffee White Stemborer, Xylotrechus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae), under Different Rainfall Regimes across the Coffee-growing Regions of Karnataka, India

The coffee white stem borer (CWSB), Xyloterchus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae) is one of the most destructive pests of arabica coffee in India. As coffee cultivation in India is mostly confined to the hilly tracts of the Western Ghats of the southern states and it is mainly grown in Kodagu, Chikmagalur and Hassan districts of Karnataka with varying rainfall patterns ranging from more than 3000 mm to less than 1000 mm. The study of the incidence of WSB and emergence of adults in relation to local weather conditions in the estates at different rainfall patterns in Karnataka [High(<2500mm), Medium (2000 to 1000mm) and low(<1000mm) rainfall areas] for two years (2016 and 2017). The emergence data and local weather parameters viz rainfall, relative humidity and temperature were correlated with adult emergence. The results indicated that the emergence of CWSB during the years 2016 and 2017 exhibited a significant positive correlation with maximum temperature and minimum temperature. While beetle emergence was negatively correlated with the quantity of rainfall and relative humidity across the six locations. From these observations, it is evident that the beetles required a higher temperature for their emergence and peak beetle emergence occurred during the middle of November in the winter flight season and during the end of April and the first fortnight of May in the summer flight periods. Multiple linear regression analysis revealed that measured abiotic factors have significant effects on emergence of CWSB adults confirming results of correlation analysis. During the same period 2016-17, coffee plantations were surveyed randomly in all the three rainfall regimes to know the influence of annual rainfall on incidence of CWSB and the percent incidence was 10.81% at rainfall <1000, 7.67% at medium rainfall and 6.16% at high rainfall areas and was non-significant across rainfall regimes.

Cultivation, Yield, Income, and Tree Diversity in a Coffee Field in the Eastern Ghats of Andhra Pradesh, India

In this study we analyse coffee cultivation, yield, revenue and tree diversity in coffee forest regimes in Eastern Ghats of Andhra Pradesh. The coffee growing regions in India are mainly confined to the traditional South Indian states that are Karnataka, Kerala and Tamil Nadu and partly in non-traditional regions are Andhra Pradesh and Odisha. While to a smaller extent in North-Eastern states. The production of coffee has an impact on the national and international economies and is the second-most traded commodity in the world. Total area under coffee plantations in Andhra Pradesh was about 4010 ha. The Average yield of Andhra Pradesh coffee is roughly 363.9026MT per year and the average revenue is 629.158(in lakhs) per year. Deforestation and the loss of biodiversity are two effects of the expansion of coffee farming. However, shade-grown coffee has been hailed as a way to safeguard tropical biodiversity. If promoted, shade-grown coffee can help preserve some biodiversity, but it can't match a natural forest's whole range of ecological advantages. The coffee cultivated in Andhra Pradesh is mainly shade grown coffee. In this study we also focused on tree species diversity, we analysed data on tree species diversity from 20 field plots (0.1 ha) in coffee area of, Eastern Ghats, Andhra Pradesh, India. We also analyse diversity indices evenness indices species richness indices and Density, frequency, basal area and IVI also calculated. Forest ecosystems can be protected against rising levels of disruption by increasing the diversity of tree species. The variety of tree species may also be directly impacted by anthropogenic disturbance.

Use of Active Sensors in Coffee Cultivation for Monitoring Crop Yield

Monitoring the spatial variability of agricultural variables is a main step in implementing precision agriculture practices. Active optical sensors (AOS), with their instrumentation directly on agricultural machines, are suitable and make it possible to obtain high-frequency data. This study aimed to evaluate the potential of AOS to map the spatial and temporal variability of coffee crop yields, as well as to establish guidelines for the acquisition of AOS data for sensing the sides of a coffee plant, allowing the evaluation of large commercial fields. The study was conducted in a commercial coffee area of 10.24 ha, cultivated with the Catuaí 144 variety. Data collection was performed with six Crop Circle ACS 430 sensors (Holland Scientific, Lincoln, NE, USA) and two N-Sensor NG sensors (Yara International, Dülmen, Germany). Seven field expeditions were made to collect data using the optical sensors during 2019 and 2021, obtaining data during the flowering, fruit-filling and fruit maturation phases (pre-harvest), and post-harvest. The results showed that the different faces of the same plant present a different Pearson’s correlation coefficient (r) to its yield, obtained with a yield monitor on the harvester. The face with the highest exposure to solar radiation presented a slightly higher correlation to yield (−0.34 ≤ r ≤ −0.17) when compared with the face with less exposure (−0.27 ≤ r ≤ −0.15). In addition, it was observed that the vegetation indices measured at the beginning of the coffee cycle (before the rainy season that starts in October) present a positive correlation to the coffee yield of that same year (0.73 ≤ r ≤ 0.91). On the other hand, this relationship is changed after the beginning of the rain season, at which time the vegetation index increases abruptly, inverting the correlation with the yield after that (−0.93 ≤ r ≤ −0.77). Furthermore, it was observed that, due to the biennial nature of coffee production, the vegetation index acquired at a specific time has an inverted relationship when compared with the yield of that year and to the yield of the following (or previous) year.