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Browsing by Author "Kartika, Juang Gema"

Now showing 1 - 10 of 10
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    Drip irrigation: Will it increase yield in traditional vegetable production system?
    Susila, Anas D.; Kartika, Juang Gema; Prasetyo, Tisna P.; Palada, Manuel C. (2008)
    In the rain-fed production system area, vegetables normally can be grown in wet season (> 200 mm/month) between December and April. During dry season (
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    Environmental friendliness fertilizer recommendation: Phosphorous calibration for yard long bean production in ultisol
    Susila, Anas D.; Kartika, Juang Gema; Prasetyo, Tisna P.; Palada, Manuel C. (2008)
    The basic purpose of soil fertility evaluation is to provide information on the nutrient status of the soil and predict the relative response to added nutrient. The Crop Nutrient Requirement (CNR) values are those amounts of nutrients needed to produce optimum, economic yields from a fertilization standpoint. It is important to remember that these nutrient amounts are supplied to the crop from both soil and fertilizer. The amounts are applied as fertilizer only when a properly calibrated soil test indicates very small extractable amounts of these nutrients to be present in the soil.
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    Fertilizer Recommendation: Correlation and Calibration Study of Soil P Test for Yard Long Bean (Vigna unguilata L) on Ultisols in Nanggung-Bogor
    Susila, Anas D.; Kartika, Juang Gema; Prasetyo, Tisna P.; Palada, Manuel C. (2010)
    Proper fertilization of a crop is knowing the crop nutrient requirement for production of maximum yield and the potential level of nutrient availability from the soil. In addition to yield obtained, quality of the commodity is an important factor of profit and shelf-life for high-value crops. Nitrogen, phosphorous, and potassium availability are the most limiting factors for maximum growth and yield. Yard Long Bean (Vigna unguilata L.) were grown to evaluate optimum rate of N, P, and K fertilizer in Ultisol Jasinga soil with low pH (5.5), low C-Organic (1.54%), very low N-total (0.12 %), low K content (0.29 me/100 g), but very high soil P2O5 concentration (19.2 ppm) to evaluate the best crop management practices with starter solution.
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    Optimum fertilizer rate for kangkong (Ipomoea reptans L.) production in ultisol Jasinga
    Susila, Anas D.; Prasetyo, Tisna P.; Kartika, Juang Gema (2008)
    Proper fertilization of a crop is knowing the crop nutrient requirement for production of maximum yield and the potential level of nutrient availability from the soil. In addition to yield obtained, quality of the commodity is an important factor of profit and shelf-life for high-value crops. Nitrogen, phosphor, and potassium availability are the most limiting factors for maximum growth and yield. Kangkong (Ipomoea reptans L.) are important traditional leafy vegetables crops cultivated in Indonesia. Kangkong (Ipomoea reptans L.) were grown to evaluate optimum rate of N, P, and K fertilizer in Ultisol Jasinga soil with low pH (5.5), low C-Organic (1.54%), very low N-total (0.12 %), low K content (0.29 me/100 g), but very high soil P2O5 concentration (19.2 ppm), to evaluate the best crop management practices with starter solution.
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    Optimum fertilizer rate for yard long bean (Vigna unguilata L.) production in ultisol Jasinga
    Susila, Anas D.; Prasetyo, Tisna P.; Kartika, Juang Gema (2008)
    Proper fertilization of a crop is knowing the crop nutrient requirement for production of maximum yield and the potential level of nutrient availability from the soil. In addition to yield obtained, quality of the commodity is an important factor of profit and shelf-life for high-value crops. Nitrogen, phosphor, and potassium availability are the most limiting factors for maximum growth and yield. Yard Long Bean (Vigna unguilata L.) were grown to evaluate optimum rate of N, P, and K fertilizer in Ultisol Jasinga soil with low pH (5.5), low C-Organic (1.54%), very low N-total (0.12 %), low K content (0.29 me/100 g), but very high soil P2O5 concentration (19.2 ppm) to evaluate the best crop management practices with starter solution.
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    Phosphor rate for vegetable grown in the ultisol: Nanggung, Bogor, Indonesia
    Susila, Anas D.; Kartika, Juang Gema; Palada, Manuel C. (Blacksburg, VA: Office of International Research, Education, and Development, Virginia Tech, 2008)
    Amaranth (Amaranthus sp), Kangkung (Ipomoea aquatica L), Eggplant (Solanum melongena L), Chili (Capsicum annuum L), Tomato (Lycopersicon esculentum Mill), Green Bean (Pahaseolus vulgaris L), and Yard Long Bean (Vigna unguilata L) were grown on Ultisol Nanggung soil with low pH (5.2), low C-Organic (1.70%), very low N-total (0.21 %), low K content (0.33 me/100 g), but high soil P2O5 concentration (10.8 ppm) to optimize P rate application. Treatments were P rate : 0, 45, 90, 135 and 180 kg P2O5ha-1 or equal to 0, 125, 250, 375 and 500 kg SP36 (36% P2O5) ha-1. Treatments were arranged in Randomized Completely Block design with three replications. In the level of soil P concentration of 10.8 ppm (Bray-1) of Ultisol, application of P fertilizer up 180 kg P2O5 ha-1 increased linearly plant height of kangkung, eggplant, chili, tomato, yard long bean and green bean and increased linearly yield of amaranth, kangkung, eggplant, chili, tomato and green bean. To achieve optimum P fertilizer rate, the range of P rate application needs to be increased.
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    Phosphorus correlation study for vegetables grown in the ultisol: Nanggung, Bogor, Indonesia
    Kartika, Juang Gema; Susila, Anas D. (Blacksburg, VA: Office of International Research, Education, and Development, Virginia Tech, 2008)
    Phosphorus (P) correlation experiment has been done in Ultisol soil in Nanggung District, Bogor, Indonesia from 2006-2007 to find the best P extraction method which suitable for vegetables i.e Amaranth (Amaranthus sp), Kangkong (Ipomoea aquatica L), Eggplant (Solanum melongena L), Chili (Capsicum annuum L), Tomato (Lycopersicon esculentum Mill), Green Bean (Pahaseolus vulgaris L), and Yard Long Bean (Vigna unguilata L). Treatments were P rate : 0, 45, 90, 135 dan 180 kg P2O5ha-1 or equal to 0, 125, 250, 375 dan 500 kg SP36 (36% P2O5) ha-1. Treatments were arranged in Randomized Complete Block design with three replications. Soil samples were taken from every plot and analyzed with five extraction methods. The extraction methods are HCl 25%, Morgan vanema, Bray 1, Mehlich and Olsen. Soil analysis result were correlated with each vegetable relative yield. The best soil extraction method is the soil extraction method that showed highest correlation with vegetable relative yield. Olsen method showed highest correlation with amaranth, chili and tomato relative yield, while HCL 25% showed highest correlation with yard long bean and eggplant. Morgan Vanema showed highest correlation with kangkong reative yield and Bray I for green bean.
  • Phosphorus correlation with relative Yield of Vegetable Grown in the Ultisol-Nanggung, Bogor, Indonesia
    Kartika, Juang Gema; Susila, Anas D. (Bogor, Indonesia: Bogor Agricultural University, 2007)
    Phosphorus (P) correlation experiment has been done in Ultisol soil in Nanggung District, Bogor, Indonesia from 2006-2007 to find the best P extraction method which is suitable for vegetables i.e Amaranth (Amaranthus sp), Kangkong (Ipomoea aquatica L), Eggplant (Solanum melongena L), Chili (Capsicum annuum L), Tomato (Lycopersicon esculentum Mill), Green Bean (Pahaseolus vulgaris L), and Yard Long Bean (Vigna unguilata L). Treatments were P rate : 0, 45, 90, 135 and 180 kg P2O5ha-1 or equal to 0, 125, 250, 375 and 500 kg SP36 (36% P2O5) ha-1. Treatments were arranged in Randomized Complete Block design with three replications. Soil samples were taken from every plot and analyzed with five extraction methods. The extraction methods are HCl 25%, Morgan Vanema, Bray 1, Mehlich and Olsen. Soil analysis results were correlated with each vegetable's relative yield. The best soil extraction method is the soil extraction method that showed highest correlation with vegetable relative yield. Olsen method showed highest correlation with amaranth, chili and tomato relative yield, while HCL 25% showed highest correlation with yard long bean and eggplant. Morgan Vanema showed highest correlation with kangkong relative yield and Bray I for green bean.
  • Review of literature on perennial peanut (Arachis pintoi) as potential cover crop in the tropics
    Kartika, Juang Gema; Reyes, Manuel R.; Susila, Anas D. (Greensboro, NC: North Carolina A&T State University, 2007)
    The use of living mulch as a substitute for plastic mulch is increasing in the tropics as researchers have gradually shifted their attention to organic farming systems. Arachis pintoi is a perennial plant and a member of the leguminosae family. A. pintoi has good potential for use as a living mulch in association with vegetables, trees, or grass (as a pasture) because of its ability to fix nitrogen from the atmosphere and to grow in heavy shade. This work, based on fact sheets, journals and text books, was undertaken to provide farmers and researchers with scientific information on the benefits of A. pintoi as a living mulch.
  • Vegetable Agroforestry Systems in Indonesia
    Susila, Anas D.; Purwoko, Bambang S.; Roshetko, James M.; Dahlia, Lia; Kartika, Juang Gema; Wijaya, Kusuma; Budidarsono, Suseno; Midmore, David J.; Prasetyo, Tisna P.; Palada, Manuel C.; Rahmanulloh, Arif; Raimadoya, Mahmud; Puspitawati, Herien; Kurniawan, Iwan; Trikoesoemaningtyas, Tri; Kunta, K.; Sombatpanit, Samran (Beijing, China: World Association of Soil and Water Conservation (WASWAC), Nairobi, Kenya: the World Agroforestry Center (WAC-ICRAF), 2012-11-30)