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All Journal Jurnal Penelitian Pertanian Terapan SAINS TANAH - Journal of Soil Science and Agroclimatology
Azman, Elisa Azura
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Agriculture, Biological Sciences & Forestry Education

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EFFECTS OF BLUE NPK FERTILIZER AND/OR BIOCHAR ON THE GROWTH AND YIELD OF OKRA (Abelmoschus esculentus L.) PLANT USING SILABUKAN SOIL Sauti, Mohamad Suhaizrezal; Azman, Elisa Azura; Ismail, Roslan; Phooi, Chooi Lin; Lakulassa, Safikah
Jurnal Penelitian Pertanian Terapan Vol 24 No 2 (2024)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v24i2.2783

Abstract

A study was conducted in nethouse at the Sustainable Agriculture Faculty at University Malaysia Sabah, Sandakan campus, to study the effect of using blue NPK fertilizers (12:12:17) with a different biochar rate (0, 1 and 2 tonnes ha-1). The objective of this study was to determine the optimum rate of NPK blue and/or biochar fertilizer on the growth and yield of okra plant using Silabukan soil and to determine the nutrient content found in the soil before and after the study. There are 15 treatments that have been used in this study and have 3 replicates for each treatment. The design used is a completely randomized design (CRD). Data were analyzed using ANOVA one way. The results for vegetative growth showed that the treatment of N5B3 (400 kg ha-1 and 3 tonnes ha-1) had the highest tree height of 185.7 cm and the highest number of leaves of 31 sheets. For the results of yield, the N4B3 (300 kg-1 blue NPK and 3 tonnes ha-1 of biochar) treatment showed the highest yield of 7 pieces of fruit and 22 cm long. For the results of soil analysis, N1B1 (0 kg-1 blue NPK and 0 tonnes ha-1 biochar) treatment showed the highest pH reading of 6.3. N2B1 treatment (100 kg ha-1 and 0 tonnes ha-1) shows the highest alumunium conversion readings of 1.5 cmolc kg-1. N4B1 treatment (300 kg-1 blue NPK and 0 tonnes ha-1 biochar) showed the highest availability of phosphorus 0.0592 mg kg-1. In conclusion, the N4B3 treatment (300 kg-1 blue NPK and 3 tonnes of ha-1 biochar) showed the best growth to produce a large amount of okra fruit about 7 pieces per plant.
Relationship between soil chemical properties and rice yield under multiple stresses in the coastal agricultural land of Pangandaran, Indonesia Nasrudin, Nasrudin; Kurniasih, Budiastuti; Putra, Eka Tarwaca Susila; Hanudin, Eko; Azman, Elisa Azura
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 1 (2025): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i1.98275

Abstract

Seawater intrusion causes salinity and waterlogging in the coastal agricultural land of Pangandaran, Indonesia. Both limiting factors cause a decrease in soil chemical properties. The decline in rice yield occurred due to the low soil chemical properties. The study aims to identify the soil’s chemical properties based on limiting factors and to reveal its relationship with rice productivity in the coastal agricultural land of Pangandaran. Soil sampling was conducted using a purposive sampling method, and the samples were analyzed in the laboratory. Various soil properties are grouped into three clusters using hierarchical clustering. The cluster of waterlogging high salinity has very high Na-exchangeable with EC ranging from 0.21 - 4.93 dS m-1, while the other two clusters contain high Na-exchangeable and EC ranging from 0.101 - 0.581 dS m-1. Rice productivity under waterlogging-low salinity is <1 t ha-1, no waterlogging-low salinity is 3.63 t ha-1, and waterlogging-high salinity is 2.48 t ha-1. There are negative correlations between Na-exchangeable, water depth, and duration of waterlogging to rice yield (R2= -0.33; R2= -0.58; R2= -0.90). Multiple stresses cause limiting factors, and low soil chemical properties can inhibit plant development. The presence of waterlogging-low salinity has a strong impact on decreasing rice yield. Finally, our study provides an overview of the coastal agricultural land of Pangandaran based on multiple stresses. Furthermore, improved soil properties are needed with good management techniques to make it suitable for rice cultivation.
Co-Authors Eka Tarwaca Susila Putra Eko Hanudin Ismail, Roslan Kurniasih, Budiastuti Lakulassa, Safikah Nasrudin Phooi, Chooi Lin Sauti, Mohamad Suhaizrezal