Karakteristik Sifat Kimia Tanah Lahan Gambut di Perkebunan Kencur Desa Sei Baru Kecamatan Panai Hilir Kabupaten Labuhanbatu

Farmers in Sei Baru village manage marginal peatlands for producing the galangal. So far, testing of soil characteristics has never been carried out. Fertilization and culture practices are just based on knowledge from generation to generation, so it is important to study the characteristics of soil chemical properties of the peatlands that have been used for producing galangal. The research was conducted from December 2020 until February 2021 in a galangal plantation-grown by the community in Sei Baru Village, Panai Hilir District, Labuhanbatu Regency. The method used was a free grid survey method at the semi-detailed survey level. The implementation of soil sampling of 5 sample points with a distance of 100 meters in the field using a random method spread over a predetermined area. The results showed that the peat soil planted with galangal in Sei Baru Village had a pH of around 4.542, C-org was 52.18%, organic matter was 89.972%, N-total was 1.418%, C/N was 36.852, P-Bray was 963.41 ppm, and K-total was 0.14. Overall, the chemical properties of the soil in galangal plantations Sei Baru Village, Panai Hilir District, Labuhanbatu Regency are in good condition.to increase its fertility for galangal cultivation, it can be done by increasing the pH and potassium in the soil so that it will become more favorable for growing galangal and can be used as a recommendation for galangal fertilization.

HARA STATUS OF POTASSIUM Absorption IN PRODUCING PALM OIL PLANT IN PERLABIAN VILLAGE, KAMPUNG RAKYAT DISTRICT, LABUHANBATU SELATAN DISTRICT

Potassium is a macro nutrient that can affect the quality and quantity of oil palm bunches as well as resistance to disease and drought stress. So far, testing the status of potassium nutrient uptake in people's plantations in Perlabian Village, Kampung Rakyat Labuhanbatu Selatan District has never been carried out. Fertilization and maintenance are carried out through knowledge from generation to generation, so it is important to have a study on the nutrient uptake status of potassium in oil palm leaves. This research was conducted using a free grid survey method at the semi-detailed survey level with a density of 100 meters. A total of 6 leaf samples were taken on the 17th leaf midrib and then rubbed with 70% alcohol and then put into the plastic sample for further testing in the laboratory of PT. Socfindo. The results showed that the potassium in leaf samples 1, 3 and 4 experienced deficiency and leaf samples 2, 5 and 6 were at the optimum. In oil palm plantations in smallholder plantations in Perlabian Village, Kampung Rakyat Subdistrict, it shows that the total K content of leaves is included in the optimum category.

Appraisal of Macro and Micronutrient Status of Soils of Washim Road Farm of Dr. PDKV Akola, Maharashtra, Using GPS

The present study was conducted during the year 2018 and 2019 at Department of Soil Science and Agricultural Chemistry, Dr Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra with an aim to know the macro and micronutrient status of soils of Washim road farm, Dr. PDKV Akola. Grid based (GPS) forty four (44) surface (0-20 cm depth) soil samples were collected by grid survey method at 200 m distance from Washim road farm and analyzed as per standard procedure for judging chemical properties and available nutrient status of soil. The results indicate that all the soils pH under study were slightly alkaline to moderately alkaline in reaction and it ranged from 7.5 to 8.6 and soils were free from soluble salt hazard (EC 0.13 to 0.38 dSm-1). Organic carbon content were ranged from 2.34-8.97 g kg-1, soils of Washim road farm was moderately calcareous to calcareous due to presence of CaCO3 in soil. The available major nutrient content in these soils showed very low status for N (100.35-175.61 kg ha-1), available P (13.25-22.4 kg ha-1), and very high for available K (340.14-539.04 kg ha-1). While the available S, it ranges from 7.58-16.4 mg kg-1. The available micronutrient content in these soils showed very low to moderate status for available Fe (2.05-5.96 mg kg-1 ), available Mn (0.82-4.47 mg kg-1) and available Zn (0.12-0.88 mg kg-1) indicates very low to medium and high for available Cu (0.73-3.12 mg kg-1).

PEMETAAN STATUS HARA P, pH dan C organik TANAH SAWAH DI DESA HILIBADALU KECAMATAN SOGAEADU KABUPATEN NIAS

The purpose of this research is to survey and mapping nutrient status of total phosphate, available phosphate, soil pH and organic carbon at paddy fields Hilibadalu Village Sogaeadu District Nias Regency and its influence on rice production. Soil samples were analyzed at the Analytical Laboratory of PT Socfindo Indonesia North Sumatera Province. Which began in October to December 2016. The method used is the Free Grid Survey semi-detailed level survey and analysis of nutrient data total phosphate by Acid destruction method (HClO4), available phosphate by Bray II method, soil pH by H2O extraction and organic carbon by Walkley & black method and then interpret to the map nutrient status. The result of research showing that status total phosphate classified by 3 statuses such as medium (81,59 ha), high (81,15 ha) and very high (27,26 ha). Available phosphate classified in 3 nutrient status such as very low (39,11 ha), low (137,40 ha) and medium (13,49 ha). Soil pH classified into 2 statuses such as moderately acidic (30,16 ha) and strongly acidic (159,84 ha). Organic carbon classified by 3 nutrient statuses such as very low (3,06 ha), low (135,84 ha) and medium (51,10 ha). Available phosphate and organic carbon affect rice production in Hilibadalu Village Sogaeadu District Nias Regency.