04. DSSC External Publications (Journals, Books, Conference Proceedings)
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Item Mangotayo!: A sustainable smart agriculture model for mango industry upliftment in Davao del Sur, PhilippinesPerito, Rhea Mae L.; Surdella, Karl Vincent A.; Restauro, Richie Boy D.; Panaligan, Nel R.; Origines, Domingo V., Jr.; Aquino, Eduardo F.; Aguilar, Razel Ann G. (Science Research Society, 2025)Mango production in the Philippines ranked seventh globally, producing high-quality mangoes and supplying different countries. However, from 2000 to 2020, the Philippine mango sector saw a steady reduction in all industry performance metrics, such as production volume, productive area, yield per unit area, and yield per tree. Furthermore, the export of mangoes is not doing as well as in earlier decades. Other problems encountered by many farmers specifically small-scale farmers are lack of pest control and nutrient management, poor induction and flowering intensity, the lack of farm-to-market roads, and low farm-gate prices. Responding to these issues, the Mango Tayo! Program developed an AI-based Smart application for mango production management, utilizing cutting-edge technologies in smart agriculture. Thus, community engagement and activities were conducted to capacitate the women and men mango growers and contractors in Digos City using the developed technology. The program was found to be successful in achieving its objectives—enabling the community partners to use cutting-edge technology in farming.Item Effect of GREENTEC organic fertilizer on the yield of pechay (Brassica chinensis)Macarayan, Olympio B.; Campaner, Alexander M. (Southern Philippines Agri-business and Marine and Aquatic School of Technology, 2004-01)This study was conducted in the farmer's field of Barrio Pampanga, Lanang, Davao City from the period February to April 2001. It aimed to generate information on the agronomic effectiveness of 20 bags per hectare GREENTEC organic fertilizer and to evaluate the growth and yield response of pechay to different rates and combinations of GREENTEC organic and inorganic fertilizers. Results showed that growth of pechay in T5 (20 bags per hectare of GREENTEC organic fertilizer alone) was comparable to that in T2 (Ammophous - 3 bags/ha + Ammosul -12 bags/ha + Muriate of Potash-0.5 bags/ha), T3 (Amorphous -11/2 bags/ha + Ammosul - 6 bags/ha + Muriate of Potash - 0.5 bag/ha; T4 (T3 + T5) and T6 (T2 + T5) but much higher compared to T1 (no fertilizer). The yield of pechay in T5 was comparable to that of T2 and T3 but significantly higher compared to the yield of pechay in T1. By mixing 20 bags GREENTEC organic fertilizer per hectare with inorganic fertilizer rates in T2 and T3, highly significant increase in yield of pechay was observed (T6 and T4).Item Kappaphycus dripping enhance seed germination and production of hybrid rice (PSBRc72H – Mestizo 1)Agudera, Juan P., Jr.; Caballero, Graciela L.; Revilla, Nila Nanette S.; Gliocam, Mariz (Southern Philippines Agri-Business and Marine and Aquatic School of Technology, 2013)This study was conducted in SPAMAST-CAS, Matti, Digos City and at New Ilocos, Magsaysay, Davao del Sur. The general objective of the study was to evaluate the germination, growth and yield of PSBRc72H as influenced by different levels of Kappaphycus Drippings (KD). Findings of the study revealed that hybrid rice seeds soaked for 12 hours with 20 ml of KD per liter of water enhanced germination to 86.67%. KD as foliar fertilizer improved the agronomic characteristics such as plant height in cm (45 DAT), number of tillers per hill (60 DAT) and number of productive tiller per hill; and yield components such as number of filled spikelets per panicle and 1,000 seed weight (g) thereby increasing the grain yield (t/ha) of hybrid rice. KD did not influence the length of panicle (cm).Item Severity of bacterial leaf blight disease and yield of PSBRc72H (Mestizo1) as influenced by cultural practicesAgudera, Juan P., Jr.; Capili, Lolito N. (Southern Philippines Agri-Business and Marine and Aquatic School of Technology, 2013)A study on the severity of bacterial leaf blight disease (Xanthomonas oryzaepv. oryzae) and yield of PSBRc72H (Mestizo 1) as influenced by cultural practices was conducted at the Central Mindanao University Agricultural Experiment Station (AES), University Town, Musuan, Bukidnon from July- November 2006 to identify combinations of different cultural practices that could provide conditions unfavorable to bacterial leaf blight disease, their effects on the yield and agronomic characteristics; and correlate the different cultural practices, agronomic characteristics, yield components, severity of bacterial leaf blight the yield. The applications of controlled irrigation practices such as applied once a week, saturated and intermittent, any of the four NPK rates (80- 60-120, 100-60-120, 80-80-140 and 100-80-140) and planting at wider distances (20 cm x 30 cm and 30 cm x 30 cm) provided conditions unfavorable to bacterial leaf blight disease. Yield was higher if applied with continuous irrigation and planted 20 cm x 20 cm and 20 cm x 30 cm than applied with controlled irrigation which was intermittent, saturated and once a week and planted at wider distance (30 x 30 cm). Applications of any of the four NPK rates (80-60-120, 100-60-120, 80-80-140 and 100-80-140) did not affect the yield. Bacterial leaf blight disease accounted 33.49%; cultural practices 10.29 %; the agronomic characteristics 40.87%; and the yield components 8.78% respectively, on the variation in yield.Item Cardaba productionCampaner, Alexander M.; Estimada, Geronima M.; Bayaron, Teresita B.; Labasano, Susana T.; Bontia, Lynette A.; Salibay, Ma. Asuncion L.; Melencion, Ralf O. (Southern Philippines Agribusiness and Marine and Aquatic School of Technology, 2008)PREFACE There is a general recognition in the Philippines and in Region XI of the importance of an appropriate cardaba banana farming for better yield and higher farm income. Appropriate production practices for cardaba crop is a basic requirement in sustaining cardaba farming. The important criteria of good, sound and appropriate cardaba production practices include good irrigation and drainage, maintained farm hygiene and soil fertility, timeliness of pest, diseases control, proper fruit care and handling and population control. Cardaba production is an important component in a coconut farming system as an intercrop. Also, it is grown in backyard/small scale, yet, its agribusiness potential is enormous. Good, sound and appropriate management for better production and higher farm income is the framework provided in the pamphlet. The authors wish to express their appreciation to the Commis[s]ion on Higher Education for funding the reproduction of this pamphlet as an important contribution towards the development and sustenance of cardaba in the country's agribusiness sector.Item Enhancing herbage growth, yield and quality of stevia (Stevia rebaudiana bertoni) using bio-organic nutrients in varied soil mediaCalapardo, Mara Jean Marielle; Manigo, Bryl I. (Penerbit Universiti Kebangsaan Malaysia, 2024)The present method of stevia propagation is still insufficient to meet its increasing demand. Moreover, the use of organic inputs as substitutes for inorganic fertilizers to improve soil quality and productivity is also desired. In this study, the effects of bio-organic nutrients and different growing media compositions on Stevia’s herbage growth, yield and quality were determined. A completely randomized design was used with 20 rooted stem cuttings per replication at one cutting per potting bag, laid in a 4 × 4 factorial arrangement. Growing Media (garden soil alone [GS]; GS + rice hull [RH]; GS + vermicompost [VC]; and GS+RH+VC) served as factor A while bio-organic nutrients (fermented fruit juice [FFJ]; vermi tea [VT]; seaweed tea [ST] and control) as factor B. There were 16 treatment combinations replicated four times. Results showed that GS+RH+VC consistently improved the survival rate, plant height, leaf and shoot count per plant, weight (fresh and dry), and herbage yield of Stevia. Furthermore, VT boosted the herbage yield and visual quality. In terms of interaction effects, plants grown in garden soil mixed with vermicompost (GS+VC) with VT application developed more leaves than other treatment combinations. Hence, these bio-nutrients and growing media composition significantly enhanced the production of Stevia.Item Seaweed-based dripping stimulates root growth of dragon fruit (Hylocereus undatus [Haw.] Britton & Rose) stem cuttingsPotente, Mayalene M.; Manigo, Bryl I. (Penerbit Universiti Kebangsaan Malaysia, 2023)Developing a solid root system is essential in dragon fruit propagation not only for securing the succulent stem but also for facilitating the absorption of water and essential minerals from the soil. However, dragon fruit stem cuttings normally develop good root system for about 4-6 months after planting. There are commercially available growth hormones which hasten rooting, but these are relatively expensive. Hence, alternative hormones from natural materials that possess the ability to stimulate rooting are extensively explored. The efficacy of seaweed-based drippings (SD) as potential rooting bio-stimulant for dragon fruit cuttings were evaluated under nursery condition. Branch cuttings (30 cm long) were soaked at 6, 12 and 18 h at the rate of 50 mL, 100 mL and 150 mL SD per liter of water (H2O), with H2O, and ANAA (5 mL/L of H2O) served as positive and negative control treatments, respectively. There were 18 cuttings in each experimental units, replicated thrice and arranged in a 3 × 5 Completely Randomized Design (CRD). Results showed that 12 h soaking initiated more and longer roots and shoots. In addition, it appeared that the application of a solution containing SD at 100 mL/L of H20 resulted in the development of numerous and longer roots and shoots, a larger number of lateral roots, and a greater root-shoot ratio than other treatments. Furthermore, application of SD at 100 mL/L of H20 through dipping for 12 h developed more lateral roots compared to other treatment combinations. In conclusion, it can be inferred that the presence of phytohormones, such as auxins, in seaweed concentrates has the potential to effectively stimulate root formation in pitaya.