Contributions of Central Research Institute for Agriculture

Effect of patchouli leaf waste compost on improving the growth and productivity of winged bean (Psophocarpus tetragonolobus L.) In Ambukha Village Lolofitu Moi Subdistrict West Nias Regency

2026-09-08T06:09:13+00:00

The results showed that patchouli leaf residue compost affected winged bean growth and productivity. Plant height was significantly affected from 3 to 6 weeks after planting, while stem diameter was significantly affected at 2, 4, 5, and 6 weeks after planting. Productivity parameters were also highly significantly affected. The number of fruits increased from 6.92 fruits per sample in P0 to 16.00 fruits per sample in P4, while fruit weight increased from 157.39 to 394.74 g per sample and from 699.78 to 1,729.55 g per plot. Treatment P4 (4 kg/plot, equivalent to 26.67 t/ha) produced the highest mean values for the measured growth and productivity parameters within the range tested. Therefore, P4 can be considered the best-performing treatment among the tested application rates under the conditions of this experiment. However, it should not be regarded as the optimum dose because application rates above 4 kg/plot were not evaluated. Practically, the results indicate that patchouli leaf residue can be utilized as a locally available compost resource for winged bean cultivation, while further research using a wider range of application rates and comprehensive soil and compost analyses is needed to determine the response beyond the tested range.

Effect of manure and compound npk fertilizer application on the growth and yield of peanuts (Arachis hypogaea L.) In Siwalubanua II Village Gunungsitoli Idanoi District

2026-09-17T01:51:20+00:00

Peanuts (Arachis hypogaea L.) are a nutritious and economically valuable food crop; however, their productivity in Indonesia, including the Nias Islands, remains low, necessitating proper soil fertility management and the provision of appropriate nutrients. This study aimed to determine the effects of pig manure and compound NPK fertilizer, as well as their interaction, on the growth and yield of peanuts in Siwalubanua II Village, Gunungsitoli Idanoi District. The study employed a factorial randomized block design (RBD) with two factors: pig manure treatments K0 (no fertilizer), K1 (3 kg/plot), K2 (4 kg/plot), and K3 (5 kg/plot), as well as NPK 16:16:16: N0 (no fertilizer), N1 (22 g/m²/application), and N2 (32 g/m²/application), with three replicates. The observed parameters included plant height, number of branches, flowering age, number of pods per sample, fresh weight of pods per sample, and fresh weight of pods per plot. The data were analyzed using ANOVA and the BNJ test at the 5% level. The results showed that pig manure and NPK 16:16:16 produced different responses for each parameter. K3 (5 kg/plot) yielded the highest values for plant height at 2–3 MST, number of branches at 2 and 5 MST, earlier flowering, and fresh pod weight per sample. K2 (4 kg/plot) produced the highest plant height at 4–5 MST, the highest number of branches at 3–4 MST, the highest number of pods per sample, and the highest fresh pod weight per plot. N2 (32 g/m²) produced the highest numerical values for most parameters. The interaction between the two factors did not have a significant effect in some early observations but began to have a significant to highly significant effect in subsequent observations and on several yield components. The K3N2 combination produced the highest numerical values for several parameters but was not always significantly different from other treatment combinations based on the 5% BNJ test.

Effect of Liquid Organic Fertilizer (LOF) Derived from Azolla pinnata on the Growth and Productivity of Red Spinach (Amaranthus tricolor L.)

2026-09-14T01:52:19+00:00

This study aims to analyze the effect of applying liquid organic fertilizer (LOF) derived from Azolla pinnata on the growth and productivity of red spinach (Amaranthus tricolor L.), as well as to determine the most effective application rate. The study was motivated by the high reliance on inorganic fertilizers, which have the potential to degrade soil quality; therefore, an environmentally friendly organic fertilizer alternative capable of providing nutrients particularly nitrogen is needed. The study employed a quantitative experimental method using a Randomized Block Design (RBD) consisting of four treatments: P0 (control), P1 (100 mL/L), P2 (150 mL/L), and P3 (200 mL/L), with three replicates, resulting in 12 experimental units. The observed parameters included plant height, number of leaves, leaf area, root length, and fresh plant weight. The data were analyzed using analysis of variance (ANOVA), followed by the Honest Significant Differences (HSD) test at a 5% significance level. The results showed that the application of Azolla pinnata based LOF had a significant effect on all growth and productivity parameters of red spinach plants, Treatment P3 (200 mL/L) yielded the best results, with an average plant height of 34.60 cm, 24.29 leaves, a leaf area of 48.96 cm, a root length of 12.63 cm, and a fresh weight of 30.60 g. Thus, the application of Azolla pinnata based LOF at a dose of 200 mL/L was the best treatment among those tested for enhancing the vegetative growth and productivity of red spinach.

Efficacy of Metsulfuron-Methyl Doses for Controlling Rat Caladium (Typhonium blumei) in an Oil Palm Plantation

2026-09-10T03:49:06+00:00

Effectiveness of controlling rat taro weed (Typhonium blumei) with various doses of the herbicide Methyl metsulfuron on oil palm plants (Elaeis guineensis Jacq) at PT Umada Kebun Pernantian. This research to evaluated the effectiveness control weed taro mouse (Typhonium blumei) against giving various doses of herbicide Metsulfuron methyl in palm oil plants. This study was implemented from April 2024 to June 2024 and is located in division 1, block 6, PT Umada Kebun Pernantian Regency, North Labuhanbatu, North Sumatra Province. Use a non-factorial randomized group design (RAK), consists of 6 levels, namely, control (M0), 15 gr/ cap (M1), 30 gr/ cap (M2), 45 gr/ cap (M3), 60 gr/ cap (M4), 75 gr/ cap (M5). Every treatment repeated four times. Observed parameters covers scoring visualization weed, weed growth inhibited, and percentage death weed. Data were analyzed by analysis of variance followed by Duncan's Multiple Range Test at the 5% level. At 5 weeks after application (WAA), M3, M4, and M5 produced visual injury of 83, 79, and 84%, respectively, and all three treatments produced a growth-inhibition score of 4.0. Weed mortality at 5 WAA was 73.8% for M3, 72.95% for M4, and 77% for M5. Because M3 produced responses statistically comparable with the higher doses for the principal efficacy variables, 45 g per knapsack sprayer was the lowest tested dose providing comparable control under the conditions of this study.