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Published By Brawijaya University

2549-9793

2022 ◽  
Vol 9 (1) ◽  
pp. 181-191
Author(s):  
Arini Ayu Ardianti ◽  
Faris Nur Fauzi Athallah ◽  
Restu Wulansari ◽  
Kurniawan Sigit Wicaksono

Healthy soil could support plant growth by optimizing the availability of nutrients. The availability of nutrients influences the health of tea plants. Nutrient deficiencies would affect the plant physiology that exhibits the plant withering. This study aimed to define the relationship between soil nutrient availability with plant nutrient uptake. This research was conducted by managing secondary data soil chemical properties, and tea plant nutrients analyzed statistically with Pearson correlation. This study only found a significant correlation between soil pH with P and Mg uptake. Correlation results between soil nutrient and plant nutrient uptake obtained a significantly negative correlation on soil pH with P and Mg nutrients with a correlation value of pH-P (r=-0.52), pH-Mg (r=-0.52). There was no correlation between other soil nutrients and plant nutrient uptake. The results of this study can be used to determine the dose of fertilization and the management recommendation of tea plants.


2022 ◽  
Vol 9 (1) ◽  
pp. 99-110
Author(s):  
Amir Fhad Sastranegara Harahap ◽  
Mochammad Munir

North Sumatra Province, where the second-highest oil palm productivity in Indonesia, has successfully reached fresh fruit bunches (FFB) production of 5,775,631.82 tons in 2016. However, the level of oil palm productivity tends to be unstable and low. The purpose of this study was to identify and analyze factors influencing the level of oil palm productivity at the Bah Jambi Plantation PTPN IV, Simalungun Regency, North Sumatra Province. The method used in this study was the qualitative descriptive analysis method by collecting secondary data at research locations at 4 Afdeling Kebun Bah Jambi PT. Nusantara IV Plantation. The results of correlation and regression analysis showed that soil factor such as organic C, soil pH, cation exchange capacity and the availability of soil N, P, K and Mg is the most dominant factors in influencing the amount of oil palm productivity which have determination coefficient (R2) more than 90%. Meanwhile, climate factors such as evapotranspiration, duration of light exposure, wind speed and rainfall have the most role in influencing oil palm productivity which has a coefficient of determination (R2) of 95%, 94%, 88% and 33%.


2022 ◽  
Vol 9 (1) ◽  
pp. 49-55
Author(s):  
Indrayani Rambu Apu ◽  
Uska Peku Jawang ◽  
Marten Umbu Nganji

Lewa sub-district is one of the sub-districts in East Sumba Regency, which has dry land that can be maximized for the development of porang plants and development purposes; information on the potential of porang plantations is needed. This study aimed to determine the biophysical characteristics of the land and the land suitability class of porang plants. The analytical method used was the matching method by comparing the land characteristics and plant growth requirements and the overlay method. The matching results show that the land characteristics in Lewa Subdistrict are class S1 (Very suitable), covering an area of 26.220,209 ha and Class S2 (quite suitable), covering an area of 3.608,523 ha. Limiting factors in this area are water availability (OA) such as drainage, nutrient retention (nr) such as CEC and pH, and erosion hazards (eh) such as slope.


2022 ◽  
Vol 9 (1) ◽  
pp. 141-146
Author(s):  
Deffi Armita ◽  
Aditya Nugraha Putra ◽  
S Sudarto ◽  
Istika Nita ◽  
Hana Kusumawati ◽  
...  

Potato production in Indonesia decreased by 2.43% from 1,314,657 in 2019 and 1,282,768 tons in 2020. One of the causes of the decline in potato production is a lack of potassium. Potassium nutrient deficiency can be caused by fertilization that is not yet precise and is still done conventionally. The purpose of this study was to estimate the nutrient content of potassium using Sentinel 2-A. This study observed 50 points that were determined through the free grid method. Sentinel 2-A was transformed into GLI, GNDVI, NDVI which is the vegetation index and NDSI, and SAVI which is the soil index. The results showed that plant K correlated with GLI CS index (r = -0,46), NDVI CS (r = -0,48) and NDSI CS (r = -0,46). NDVI CS (R2 =2 3%) is the most accurate index in estimating the nutrient content of Potassium than GLI CS (R2 = 21%) and NDSI CS (R2 = 21%). Based on the results of the plant K regression test and NDVI CS, the regression equation y = 1,8003 + (-0,5716 NDVI CS) was obtained. The results of the validation test showed that the t table (-3.18) > t count (2.15) so that there is a significant difference in the estimation results of potassium with the results of potassium obtained in the field. Based on the results of the validation test which were significantly different, the productivity estimation model could not be used to estimate the potassium nutrient in potatoes.


2022 ◽  
Vol 9 (1) ◽  
pp. 111-119
Author(s):  
Qowam Mutashim Maulana ◽  
Zaenal Kusuma ◽  
Kurniawan Sigitt Wicaksono

The land problem that commonly occurs in Ranu Pani Watershed is erosion. Ranu Pani Watershed is an area located in the mountains with very high soil erosion. Therefore, it is necessary to conduct good management in the upstream and downstream areas. The first step before carrying out the management is to analyze the occurrence of erosion in the Ranu Pani Watershed. The purpose of this research was to predict the potential erosion and the distribution of spatial data.. The results of the research showed that the erosivity value in the Ranu Pani Watershed was 961.44 and heavy to very heavy class (0.50-0.77) of erodibility, soil texture was dominated by silt, fine granular soil structure, and moderate dominant permeability. 56.80% of the area (158.27 ha) has a slop class III (15-30%) with the land cover are natural forest with lots of litter, grasslands, shrubs, and fields of onions and potatoes. Land management is managed cultivation follows the contour line but without conservation. The result of the calculation showed that almost all areas have potential erosion value exceed the permissible erosion determination, with the potential erosion value are 1.92-4246.28 tha-1 yr-1, the range of permissible erosion value are 0.029- 1.2 tha-1 yr-1, and the erosion hazard index value is 1.57-143442.49. The results of the spatial analysis showed that 64.39% of the area (179.41 ha) has a very heavy erosion hazard class and 69.50% of the area (193.66 ha) has a very high erosion hazard index.


2022 ◽  
Vol 9 (1) ◽  
pp. 57-67
Author(s):  
Laili Ayu Maulida ◽  
Mochammad Munir

Land use in Lumajang Regency is dominated by agricultural land. However, over time there was a conversion of agricultural land into residential land as a result of an increase in population. The purpose of this study was to determine the pattern and area of optimal land-use allocation increase economic value in Lumajang Regency. The method used in this study was linear programming with the simplex method. The maximum farming income obtained from optimizing land use is Rp710,306,800,000.00. The optimal land-use area for paddy fields is 42,686.71 ha, the protected forest is 12,652 ha, and residential land is 18,284 ha. The optimal proportion of land use is 58% rice fields, 17% protected forests, and 25% settlements. The optimal paddy field area has decreased by 6,003.26 ha from the land area in 2018 because there are paddy fields that do not match their characteristics. The largest area of rice field reduction in Candipuro District is 2,138.51 ha. Meanwhile, the direction for the allocation of residential land has increased settlement land from 2018 with an area of 1,114.1 ha. The development of residential land is allocated to land that has been planned for settlement in the Spatial Planning (RTRW), potential land that has a slope value of 0 - 25%, and areas with low population density. The largest additional area of residential land in Pronojiwo District is 300 ha.


2022 ◽  
Vol 9 (1) ◽  
pp. 93-98
Author(s):  
Marten Umbu Nganji ◽  
Uska Peku Jawang

Agricultural land is land that can affect agricultural productivity. Land, which is part of land resources, is the main component in the production of agricultural commodities. In supporting the productivity of agricultural commodities, there must be sufficient nutrients in the soil. Tabundung sub-regency is a producer of food crops, livestock and fisheries. As the main producer in the agricultural sector, the production of agricultural crops is not proportional to the total area of harvested land, meaning that the productivity of agricultural crops is not optimal if it is based on harvested area. The study was conducted in Tarimbang Village, Proud Watu and Tapil Regency of Tabundung. The method used in this research was survey technique and soil sampling was carried out in a composite manner. Soil samples were analyzed at the Nusa Cendana University Laboratory, Kupang. Primary data analyzed were elements of nitrogen (N), phosphorus (P), potassium (K), organic carbon (C), cation exchange capacity (CEC), and pH. The results showed that the overall nutrient status of N, P, and K were in the medium, high and very high categories, but there were some sample points that were in the low category for macronutrients N and P. While the concentrations of organic C, CEC and pH were overall generally in pretty good condition. This condition indicates that the research area provides sufficient nutrients for plant cultivation during the growth and yield of plants, but improvements are needed to overcome macronutrient deficiencies in several observation locations.


2022 ◽  
Vol 9 (1) ◽  
pp. 83-91
Author(s):  
Destantri Krisdiati ◽  
S Soemarno ◽  
Mochtar Lutfi Rayes

It is feared that the decline in productivity of plantation crops in Malang Regency, so it is necessary to analyze the soil productivity index at ATP Jatikerto as one of the locations for producing plantation plants. This soil productivity index assessment was presented in the form of a map to make it easier to see the distribution pattern of soil productivity in ATP Jatikerto. The results of the calculation of the productivity index showed that the land potential varied from land with poor to sufficient criteria, namely maize land with an IP (Productivity Index) of 43.27, which is included in the bad IP criteria. In coffee, cocoa, sugarcane, papaya, and citrus fields, they are categorized as moderate with IPs of 50.14, respectively; 45.82; 39.45; 52.26; and 45.82. Actions that can be taken to overcome the problem of decreasing productivity are to carry out regular fertilization, both organic and inorganic, to keep nutrients available for cultivated plants, as well as adding organic matter using litter which not only serves to add nutrients but can also be used as organic mulch to prevent raindrops from falling directly to the ground so that the loss of topsoil can be minimized and increase the population of soil microorganisms. In addition, it can also use bagasse, blotong or manure which can improve the physical condition of the soil by reducing soil density and increasing macropores for better root growth, and ultimately increasing sugarcane yield.


2022 ◽  
Vol 9 (1) ◽  
pp. 193-200
Author(s):  
Al Azizu Saifulloh ◽  
Retno Suntari

Entisols are newly formed soil types and are commonly found in Indonesia, with a distribution of ±3 million ha distribution. Entisol Kalidawir has a slightly acidic pH value of 5.8 and contains very low total-nitrogen (N) and available-phosphorus (P) nutrients, calcium (Ca), sodium (Na) and magnesium (Mg) in the exchangeable base are also low and clay loam texture. Low soil nutrients and organic matter can have an impact on plant growth and production Maize is one of the most widely cultivated food crops in Indonesia. The purpose of this study was to analyze various doses of the combination of cow manure and NPK fertilizer on N, P and potassium (K) uptake, growth and production of maize. The results showed that the application of 20 t ha-1 of cow manure and 400 kg ha-1 of NPK fertilizer at observations 27 and 54 days after planting increased growth in height and number of leaves of corn plants and increased nutrient uptake of N, P, and K, respectively. Also reached 1, 0.14, and 0.82 g plant-1 and 5.52, 0.83, and 5.11 g plant-1. In addition, it produces the highest corn production of 10.53 t ha-1.


2022 ◽  
Vol 9 (1) ◽  
pp. 13-19
Author(s):  
Dina Ananda Harfia ◽  
Sugeng Prijono

The uneven distribution and intensity of rain cause a shortage and excess of water in dry land farming. It appears that the problem of soil conservation in principle is the regulation of the relationship between rainfall intensity, infiltration capacity, and runoff adjustment. To improve the physical properties of the soil, and the hydrological function of the land use it cannot only be stressed on the coffee plant. Other factors such as soil surface management, such as providing organic matter, covering the soil surface with understory plants, making absorption holes, terraces, waterways and so on, can improve the hydrological function of the land. Rainwater management can be carried out through controlling surface runoff, harvesting rainwater, increasing soil infiltration capacity, managing soil, controlling evaporation and seepage, lining waterways. The use of silt pit parallel is considered quite effective because it is able to produce the lowest surface runoff and sufficient water storage. Silt pit parallel can produce 0.6% of rainfall into surface runoff and also can store water as much as 62.35% of the rainfall that enters the plot. The functions of a silt pit are to increase water infiltration into the soil. On dry land, silt pit functions as a place for harvesting rainwater and surface runoff. Based on the correlation regression test, the amount of surface runoff is closely influenced by the intensity of rain or rainfall.


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