The Relation Study of Soil Nutrient to Productivity of productive Tea Plants in Pagar Alam Tea Plantation, South Sumatra

Tea plantation area in recent years has decreased by 0.75% annually. With the decline in the area of tea plantations, productivity also decreases. Decreased productivity can be caused by erosion, climate, clones, and management applications. The purpose of this study was to determine the availability of soil nutrients in Pagar Alam tea plantation and the relationship with productivity. The observation was held with secondary data and analyzed statistically with the correlation method. Parameters observed were pH, organic C, total N, P2O5, exchangeable K, and exchangeable Mg. The result showed that the relationship between soil nutrients such as organic C, total N, available P, exchangeable K, and exchangeable Mg with productivity was weak with correlation coefficient values of 0.00 – 0.199. These results also showed that the correlation was negative, which means that the two variables were inversely proportional. Plant maintenance factors have a more significant role in tea plant productivity than nutrients and fertilization, such as picking, pruning, root zone improvement, and plant pest control. If these factors can be controlled properly, shoot production will increase, and plant health can be maintained. Thus, in this case, the nutrient factor is not the main factor affecting productivity at Pagar Alam Tea Plantation, indeed the plant care factor.

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SOIL EROSION EFFECTS ON SOIL QUALITY AND YIELD

Canadian Journal of Soil Science ◽

10.4141/cjss90-046 ◽

1990 ◽

Vol 70 (3) ◽

pp. 471-484 ◽

Cited By ~ 81

Author(s):

G. E. VERITY ◽

D. W. ANDERSON

Keyword(s):

Soil Quality ◽

Cumulative Effect ◽

Fine Sand ◽

Soil Productivity ◽

Total N ◽

Organic C ◽

Grain Yields ◽

Potentially Mineralizable N ◽

The Impact ◽

The Relationship

This study examines the cumulative effect of erosion on soil properties that are important to productivity, and estimates the effect of erosion on grain yields. Experiments were located in central Saskatchewan on Dark Brown soils of the Weyburn Association. The relationship between yields and relative distance down eroded hillslopes was described best by a third-order polynominal equation. Grain yields were lowest on the upper slopes and increased steadily through mid-slopes to maximum values that were often double the upper slope yield on the lower or foot slope, then decreased again in the more level parts of the fields away from the slope. The impact of varying degrees of erosion on productivity was estimated by adding back incremental depths of topsoil to eroded knolls. Grain yields were increased by 45–58% by adding 50 mm of topsoil, with additional topsoil (100 or 150 mm) generally increasing yields slightly, but at a decreasing rate. Changes in soil quality with increasing erosion were measured on otherwise similar soils on eroded knolls, with the period of cultivation ranging from 0 (native) to 75 yr. Reductions in the amount of 137Cs in surface horizons with increasing period of cultivation indicated the cumulative effects of erosion, with general soil losses of 20 to 30 Mg ha−1 yr−1. Consistent reductions in silt plus very fine sand fractions with time suggested that wind erosion had been dominant. Organic C and P, total N and S decreased with increasing erosion. Potentially mineralizable N descreased at a faster rate than total N. The CaCO3 content of surface horizons increased, and inorganic P remained constant with increasing degree of erosion. Key words: Nutrients, soil productivity, soil quality, eroded, catena.

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Ultisols fertility and morphological characteristics of N-fixing bacteria from oil palm rhizosphere

Pesquisa Agropecuária Tropical ◽

10.1590/1983-40632021v5168559 ◽

2021 ◽

Vol 51 ◽

Author(s):

Indah Oktari ◽

Novilda Elizabeth Mustamu ◽

Hilwa Walida

Keyword(s):

Oil Palm ◽

Nitrogen Availability ◽

Morphological Characteristics ◽

Exchange Capacity ◽

Exchangeable Cations ◽

Gram Negative Bacteria ◽

Dominant Type ◽

Total N ◽

Organic C ◽

The Relationship

ABSTRACT Exploratory studies on microorganisms from the oil palm rhizosphere can be used to increase the nitrogen availability in acidic soils. The present study aimed to determine the soil nutrients and obtain the relationship among the soil chemical characteristics, as well as the morphological and microscopic characteristics of N-fixing bacteria isolates, in Ultisols from the oil palm rhizosphere. The Ultisols fertility was classified as very low to moderate. In addition, the increasing soil pH toward neutral increased the cation exchange capacity, exchangeable cations (Ca2+, K+ and Mg2+), total N, organic C and available P. Nitrogen-fixing bacteria isolates with varied shapes (circular, concentric, irregular and diffuse) and edges (wavy, slippery and irregular) were found, and the dominant type of isolate presented raised elevation. Four types of isolate had a white color and only one a clear color. Three Gram-positive and two Gram-negative bacteria isolates showed a bacillus shape.

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The Effects of Mixed Source Fertilizer Application on Vertisol Fertility and Growth of Mustard

Journal of Tropical Soils ◽

10.5400/jts.2017.v22i3.139-148 ◽

2017 ◽

Vol 22 (3) ◽

pp. 139-148

Author(s):

Jauhari Syamsiyah ◽

Sumarno Sumarno ◽

Suryono Suryono ◽

Nur Echsan Muhamat Rajab ◽

Ida Aryaningrum

Keyword(s):

Block Design ◽

Nutrient Content ◽

Fertilizer Application ◽

Growth And Yield ◽

Available P ◽

Fresh Weight ◽

Total N ◽

Organic C ◽

Nutrient Contents ◽

Exchangeable K

Soil fertility is a crucial factor determining the growth and yield of plants. The increase of nutrient content and availability in soil can be achieved by fertilization. A field experiment was conducted using a Randomized Completely Block Design (RCBD) with two factors and three replications in order to study the effects of Mixed Source of Fertilizer (MSF) application on the nutrient contents in Vertisol and its relationship to the growth and yield of mustard. The first factor was the three MSF formulas (F1, F2, F3) and second factor was the doses of MSF (0; 2.5; 5.0; 7.5; 10 Mg ha-1) applied to the soil. At the end of the experiment, the soil pH, CEC, organic-C, total-N, available-P and exchangeable-K contents were measured. The results show that there are no significant differences on the soil chemical characteristics, such as pH, organic-C content, available-P, exchangeable-K, -Ca and -Mg measured after application of different MSF formulas to the soil. Meanwhile, the increase of MSF doses applied to the soil significantly increases organic-C content, total-N, available-P and exchangeable-K in the soil. The significant increase of available-P (by 29.13%) and total-N (by 24.1%) occured after application of MSF at 5.0 Mg ha-1 and the increase of exchangeable-K (by 50%) is achieved after application of 7.5 Mg ha-1, in comparison to that without MSF application. The height and fresh weight of mustard increase in accordance with the increase of MSF doses applied. The application of 10.0 Mg ha-1 MSF results in the highest height and fresh weight of the mustard up to 63.9% and 620%, respectively. The height and fresh weight of mustard are positively correlated to the total-N, available-P and exchangeable-K in the soil. The MSF is an alternative fertilizer that can be used to improve Vertisol fertility and plant growth.

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Chemical Properties of Inceptisol and Rice Yields Applied with Mixed Source Fertilizer (MSF)

Journal of Tropical Soils ◽

10.5400/jts.2018.v23i1.1-9 ◽

2018 ◽

Vol 23 (1) ◽

pp. 1-9

Author(s):

Jauhari Syamsiyah ◽

Sumarno Sumarno ◽

Suryono Suryono ◽

Winda Sari ◽

Muhammad Anwar

Keyword(s):

Plant Height ◽

Block Design ◽

Organic Fertilizer ◽

Chemical Properties ◽

Total N ◽

Organic C ◽

Exchangeable K ◽

Significant Difference ◽

Rice Yields ◽

The Impact

One effort that can be done to improve soil fertility and crop yields is fertilization. Fertilization using a mixed source fertilizer (MSF) is an option to overcome the impact of inorganic fertilizer use and organic fertilizer drawbacks. This study aims to evaluate the effects of MSF application on the chemical properties of Inceptisol and rice yields. A field experiment was conducted using a completely randomized block design (RCBD) with two factors and three replications. The first factor was the three formulas of MSF (F1, F2, F3) and the second factor was MSF doses (0, 2.5, 5, 7.5, 10 Mg ha-1). The results show that there is no significant difference on the total soil N, available soil P, plant height and total number of tillers of rice plants applied with the three MSF formulas. The increased MSF doses applied significantly improve the soil chemical properties of Inceptisol and rice yields. The application of 10 Mg ha-1 MSF increases total- N (57.89%), available-P (29.13%), exchangeable-Ca and -Mg (117% and 250%, respectively), plant height (40%) and total number of tillers (43.2%) in comparison to those without MSF application. There are interaction effects between formulas and doses of MSF on the amount of exchangeable-K, organic-C content, and CEC of the soil and rice yields. The application of 10 Mg ha-1 MSF F3 results in better effects on the amount of exchangeable-K, organic-C content and CEC of the soil, and number of productive tillers and rice yields than the application of other MSF formulas. The MSF can be used as an alternatif fertilizer that can improve Inceptisol productivity.

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THE SULPHUR STATUS OF EASTERN CANADIAN PRAIRIE SOILS: THE RELATIONSHIP OF SULPHUR, NITROGEN AND ORGANIC CARBON

Canadian Journal of Soil Science ◽

10.4141/cjss85-018 ◽

1985 ◽

Vol 65 (1) ◽

pp. 179-186 ◽

Cited By ~ 9

Author(s):

L. D. BAILEY

Keyword(s):

Sandy Loam ◽

C:N Ratio ◽

High Potential ◽

Canadian Prairie ◽

Canadian Prairies ◽

Total N ◽

Organic C ◽

Prairie Soils ◽

Relationship Of ◽

The Relationship

Surface and subsurface samples of 17 of the most agriculturally important soils of the eastern Canadian prairies were analyzed for total S, sulphate S, total N and organic C. The soils varied in texture from sandy loam to clay loam. Fifteen of the soils were of the Chernozemic order, one was Brunisolic and the other Luvisolic. The subgroups included were Orthic Blacks, Gleyed Rego Blacks, Orthic Dark Greys, Eluviated Eutric Brunisol and Orthic Luvisol. The total S of the soils decreased with depth and was significantly correlated with total N and with organic C. The sulphate sulphur extracted with 0.1 M CaCl2 accounted for an average of 2.6% of the total S in each of the three soil depths analyzed. The calculated N:S and C:N ratios averaged 8.3 and 1.25 (0–15 cm), 7.2 and 14.1 (15–30 cm), and 6.5 and 11.0 (30–60 cm), respectively. The N:S ratios, and to limited extent the C:N ratios, were used to describe the sulphur status of the soils. Soil with N:S and C:N ratios 6.0 and 12.5 (0–15 cm), 5.2 and 13.5 (15–30 cm), 4.7 and 11.4 (30–60 cm), respectively, could have a high potential to supply sulphate S to plants and may not be deficient in plant-available S. Soils with N:S and C:N ratios of 8.7 and 13.5 (0–15 cm), 7.2 and 14.7 (15–30), 6.3 and 11.2 cm (30–60 cm), respectively, may be deficient in sulphur for some crops. However, they may have a high potential to convert total S to sulphate S. Soils with N:S and C:N ratio of 12.4 and 11.2 (0–15 cm), 11.1 and 13.0 (15–30), 10.2 and 9.9 (30–60 cm), respectively, may be deficient in plant-available S and could have a low potential for conversion of total S to sulphate S. Key words: Sulphur status of soils; potential available sulphur

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Study of Soil Characteristics on Dryland Productivity of the Supiturung Micro Watershed, Kediri Regency

Jurnal Tanah dan Sumberdaya Lahan ◽

10.21776/ub.jtsl.2022.009.1.8 ◽

2022 ◽

Vol 9 (1) ◽

pp. 69-81

Author(s):

Muhammad Fikri Baihaqi ◽

Mochtar Lutfi Rayes ◽

Christanti Agustina

Keyword(s):

Physical Properties ◽

Soil Profile ◽

Chemical Properties ◽

Soil Characteristics ◽

Total N ◽

Organic C ◽

Physical Conditions ◽

The Relationship ◽

Texture Class ◽

And Chemical Properties

A study of soil characteristics dryland productivity of the Supiturung Micro Watershed, Kediri Regency, was conducted by observing the physical conditions of the environment and identifying the morphological and physical properties of the soil in each horizon in the soil profile. Parameters observed were physical properties (texture, bulk density) and chemical properties (CEC, total N, organic C, and base saturation). Data on soil characteristics and plant productivity were then analyzed by correlation and regression to determine the relationship between the two. The results showed that the soil in the study area belongs to the order Inceptisols and Entisols with the dominant subgroup Typic Humudepts. Pineapple plants were spread at SST 5, 7, 9, and 10 with the productivity of 71.18%, 76.35%, 75.76%, and 72%, respectively. Meanwhile, sugarcane was spread in SPL 1, 2, 3, 4, 6, and 8 with the productivity of 71%, 77%, 73.43%, 76.29, and 70.81%, respectively. The results of the analysis show that the land characteristics that affect the productivity of pineapple plants are sand texture with a correlation coefficient value of 0.84 and a regression of 0.71 with a linear equation y= -0.07x + 67.57 R² = 0.53 Land with a sand texture class increasingly has low productivity.

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PENGARUH KEGIATAN EKSTRAKURIKULER PADUAN SUARA TERHADAP HASIL BELAJAR SENI BUDAYA (BERNYANYI LAGU DAERAH) DI SMP NEGERI 10 PADANG

Jurnal Sendratasik ◽

10.24036/jsu.v9i1.109392 ◽

2020 ◽

Vol 9 (3) ◽

pp. 29

Author(s):

Diovani Rahardi Thursdila ◽

Esy Maestro

Keyword(s):

Learning Outcomes ◽

Extracurricular Activities ◽

Significant Relationship ◽

Quantitative Research ◽

Correlation Method ◽

Secondary Data ◽

Student Learning Outcomes ◽

Folk Songs ◽

Primary Data ◽

The Relationship

Abstract This study aims to determine whether choir extracurricular activities affect student learning outcomes. This research is a quantitative research with correlation method. Theories used are about extracurricular, choir, learning and instruction, learning outcomes, andCulture and Arts.The data supporting this study sourced from primary data and secondary data. The results show that there is a significant relationship between extracurricular activities and the learning outcomesof singing folk songs. Based on the calculation of simple correlation test, it shows that r count> r table (0.853> 0.831). Thus, it can be concluded that the relationship is positive and can be continued with a significant test. Significant test is sought by using the t test. The resultgot istcount>ttable (7.004> 1.907). This value gives a conclusion that there is a positive and significant relationship between the choir extracurricular activities (X) on the learning outcomes of arts and culture (Y) at SMP N 10 Padang.Keywords: Extracurricular, Choir, Learning Outcomes, Culture and Arts

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PERSEPSI PETERNAK PADA KEPEMIMPINAN PENDAMPING DAN HUBUNGANNYA DENGAN PRODUKTIVITAS USAHA TERNAK DI PAGUYUBAN AL-AWWALIYAH, PASIRWANGI, GARUT, JAWA BARAT

AGRIBUSINESS JOURNAL ◽

10.15408/aj.v12i1.11850 ◽

2019 ◽

Vol 12 (1) ◽

pp. 42-51

Author(s):

Dwi Indah Sulistiani ◽

Ujang Maman ◽

Junaidi J

Keyword(s):

Data Analysis ◽

Secondary Data ◽

Primary Data ◽

Leadership Qualities ◽

Chi Square ◽

Education Experience ◽

Spss Software ◽

Chi Square Analysis ◽

And Behavior ◽

The Relationship

Objective of this research; 1) determine the perception of ranchers against the properties and behavior of the leadership of the companion in the Society of Al-Awwaliyah 2) analyze the relationship between productivity breeder with productivity of livestock in the Society of Al-Awwaliyah 3) identify the relationship perceptions of ranchers against the leadership companion with productivity of livestock in the Society of Al-Awwaliyah , The data used in this study are primary and secondary data. Primary data were obtained from questionnaires which stem from ranchers while secondary data sourced from literature in the form of books and articles. Data processing was performed using Chi-square analysis using SPSS software version 21. One of the factors relating to the productivity of ranchers is the perception of ranchers against the leadership of their companion. Leadership companion views of the nature and behavior of which is owned by a companion. Productivity ranchers indirectly related to the productivity of the cattle business. Characteristics breeder visits of age, years of education, experience ranchers, and businesses in addition to ranchers. The results of data analysis showed that there is a significant relationship between business other than ranchers with ranchers productivity. The relationship between the perception of the nature of the companion breeder with productivity ranchers produce Pearson Chi-Square value is 9.751 and Asymp. Sig. (2-sided) of 0.002. This is due to interest ranchers against leadership qualities possessed by a companion who produce prolific ranchers. Ranchers consider that a companion of his leadership qualities are ideal as a companion.

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FISCAL STRESS: Studi Kasus Pemda Provinsi Nusa Tenggara Timur

Wahana ◽

10.35591/whn.v21i2.152 ◽

2019 ◽

Vol 21 (2) ◽

pp. 125-135

Author(s):

Mesri Welhelmina N. Manafe ◽

Zet Ena ◽

Salmun Saul Adu

Keyword(s):

Low Income ◽

Local Governments ◽

Secondary Data ◽

Fiscal Stress ◽

Fiscal Health ◽

Significance Level ◽

Stress Variable ◽

Local Budget ◽

The Relationship ◽

Direct Expenditure

Local governments play a significant role in the life of the community and the national economy which can be achieved in fiscal health conditions reflected in the low disparity in income structure towards regional expenditure. The inability of regions to escape fiscal dependence is due to the low income, especially from Pendapatan Asli Daerah, which causes fiscal stress which then impacts on policies and implementation of regional spending through spending on programs and activities. This study will examine the relationship between Fiscal Stress and Pendapatan Asli Daerah and expenditure of East Nusa Tenggara Province through simple linear regression testing using secondary data Pertumbuhan Pendapatan Asli Daerah and Belanja Langsung using a sample of six (6) districts / cities in 2014-2016 The results of the study show that the fiscal stress variable does not affect the income structure through Pertumbuhan Pendapatan Asli Daerah and Belanja Langsung at a significance level of <0.05. The results of this study contribute to local budget policies and theoretically to the use of direct expenditure variables that are different from previous studies. Key Words: Fiscal Health, Fiscal Stress, Pendapatan Asli Daerah, dan Belanja Langsung

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