Results of potato fertilizer demonstrations in Pangalengan and Garut, Indonesia : Wet season 2014/2015 and dry season 2015

Brink, L. van den; Gunadi, N.; Wustman, R.; Moekasan, T.K.; Prabaningrum, Laksminiwati; Karjadi, A.K.; Hengsdijk, H.; Pronk, A.A.; Ppo,; Landgebruik, Pri Agro Multifunctioneel; Rc, Pe; Plantenecologie, Pri Agro Toegepaste

doi:10.18174/405722

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…All plantings were fertilized with 22 tonnes organic manure per ha thus providing 220 kg N/ha, 330 kg P2O5/ha and 220 kg K2O/ha. About half of the N becomes available for the potato crop during the growing season [9].…”

Section: Resultsmentioning

confidence: 99%

“…The N applied from chemical fertilizers in Garut was higher than that in Pangalengan. The mean N-application from chemical fertilizers was 180 kg N/ha, therefore the total N applied from manure and chemical fertilizers was as high as 400 kg N/ha where N fertilizer experiments in Garut and Pangalengan indicated that an optimal N-application from chemical fertilizers between 107 to 170 kg N/ha plus 15 tons/ha of chicken manure would maximize Granola yields [9]. The N application in Atlantic in Pangalengan was lower than that in Granola, whereas the N application in Granola in Garut was higher than that in Pangalengan.…”

Section: Resultsmentioning

confidence: 99%

“…The fertilizer experiments carried out in 2014 and 2015 in Pangalengan and Garut indicated that the optimal P2O5 application from chemical fertilizers for maximum yield of Granola in Pangalengan and Garut was between 114 to 165 kg P2O5 and 104 to 126 kg P2O5/ha plus 10 ton/ ha chicken manure, respectively. Although the majority of the P2O5 in potato production is applied with organic manure, application of small amounts of P2O5 through chemical fertilizers is essential for high potato yields in Pangalengan and Garut [9].…”

Section: Resultsmentioning

confidence: 99%

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Identifying key factors to improve productivity and reduce environmental impact of potato farms in West Java, Indonesia

Gunadi¹,

Pronk

2023

E3S Web of Conf.

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Potato (Solanum tuberosum L.) production in Indonesia has increased significantly in recent years, with a total annual production of 1.3 million tons. Although the acreage of potatoes is increasing relatively, the productivity of potatoes remains stagnant and is relatively low, around 16-17 tons per ha. A series of studies with the objective to identify key factors associated with potato cultivation and to evaluate of existing farmers’ practices were carried out in the main potato-producing areas i.e. Pangalengan and Garut, West Java during five consecutive production seasons starting from the dry season of 2013 to the dry season of 2015. In each sub-district, ten potato farmers growing cv. Granola and/or Atlantic were selected resulting in 40 participating farmers. A substantial variation of the observed yields was found for both varieties and regions, mainly due to seed quality. The supply of nitrogen (N) and phosphate (P2O5) from organic and chemical fertilizers of 400 kg N and 581 kg P2O5/ha outreached results of local experiments in obtaining optimal yields. Farmers applied much more active ingredient (AI) per spray, up to 6 times and used more than 500 l of water per spray to control late blight, while experiments showed the spray volume can be reduced by 10-20% without loss of efficacy. The key factors identified in this study to stimulate potato development and productivity and reduce environmental impact in the areas were seed potato quality, fertilizer use efficiency and late blight control.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Identifying key factors to improve productivity and reduce environmental impact of potato farms in West Java, Indonesia

Gunadi¹,

Pronk

2023

E3S Web of Conf.

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“…The P application rates and insecticide rates applied were high (Fig. 5), and in case of P application rates mostly above optimum levels for potato (van den Brink et al 2016). The historical and currently high application rates of P with mineral fertilizers and manure products on potato crops (Kashyap et al 2023;Moll 1981), mitigated the soil Pxating properties of volcanic soils in West Java under vegetable cultivation (Anda et al 2020;Yatno and Zauyah 2008).…”

Section: Discussionmentioning

confidence: 98%

Opportunities to narrow potato yield gaps and increase resource use efficiency in West Java, Indonesia

Pronk,

Gunadi,

Hermelink

et al. 2024

Preprint

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Consumer demand for potato in Indonesia increases while production stagnates. Government policy recognized this discrepancy and prioritized efforts to increase potato yields through farmer support programs with moderate effects to date. This study aimed to decompose potato yield gaps and identify agronomic yield constraints in West Java. Actual yield and management practices of 178 farm registrations over five consecutive growing seasons were analyzed with stochastic frontier analysis. The potential yield (Yp) for each registration was simulated with the LINTUL-POTATO-DSS crop model. The overall yield gap was decomposed into its efficiency, resource, and technology components. The potato yield gap was 21.5 t ha -1, corresponding to 54% of Yp. The efficiency and technology yield gaps were both ca. 10 t ha -1, corresponding to 26% of Yp, and the resource yield gap was negligible. All fields received sufficient inputs for potential production but most inputs were used inefficiently. An early first fungicide spray after emergence and frequently spraying to control late blight increased yields significantly. The seed generation planted was critical to potato yield gaps as yield decreased significantly with older generations. Some high yielding fields, however, were also planted with older generations, so other production factors contributed to the yield gap as well. Improving potato yield will require well performed late blight control, the use of high-quality seed, and improved management practices, which include reduced input rates, to reduce current yield gaps sustainably.

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“…Results are reported and not discussed in this report. Demonstrations on fertilisation practices were designed and performed in Garut and Pangalengan in the rainy season of 2013-14, the rainy season of 2014-15 and the dry season of 2015 ( Van den Brink, et al 2015a). In the rainy season of 2013-14 different nitrogen (N) application levels were compared with farmers' practices of varieties Granola and Atlantic.…”

Section: Field Demonstrationsmentioning

confidence: 99%

Assessment of vegIMPACT potato trainings in Garut and Pangalengan

Pronk¹,

Ppo²,

Plantenecologie³

et al. 2018

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Results of potato fertilizer demonstrations in Pangalengan and Garut, Indonesia : Wet season 2014/2015 and dry season 2015

Cited by 4 publications

References 5 publications

Identifying key factors to improve productivity and reduce environmental impact of potato farms in West Java, Indonesia

Identifying key factors to improve productivity and reduce environmental impact of potato farms in West Java, Indonesia

Opportunities to narrow potato yield gaps and increase resource use efficiency in West Java, Indonesia

Assessment of vegIMPACT potato trainings in Garut and Pangalengan

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