The Use of Solar Cell in Ground Water Irrigation to Support Agricultural Cultivation in Rainfed Field

This research aims at developing the use of solar cell to water the ground water irrigation in order to support agricultural cultivation in rain-fed field. The location of this research was agricultural land (ricefield) in Singkarak village, X Koto Singkarak sub-district, Solok district. This research was conducted with the design and technical test of ground water irrigation with solar cell, the analysis of irrigation water demand with crop-wat and the analysis of financial feasibility. The result of analysis showed that the potential of solar energy in Singkarak village could be used to activate the water pump of irrigation. The result of measurement showed that battery which its capacity was 12 V and 100 Ah needed four hours to be charged by five units of 50 Wp panel PV. Battery as the source of power was able to activate water pump of 125 Watt for 7,52 hours and mean debit that was able to be pumped is 17,45 litre/minute. From 24 periods of plantation time planned in rain-fed field, there were only three periods of plantation that the operational hours of their water pumps were able to be covered by the battery namely January 2, February 2, and November 2. Based on the result of financial analysis, these three periods of plantation were financially feasible in their implementation because the value of B/C ratio > 1 and NPV > 0

ANALISIS FAKTOR YANG MEMPENGARUHI PRODUKSI PADI SALIBU DAERAH SUMATERA BARAT

Pada budidaya padi salibu ada beberapa faktor yang berpengaruh antara lain; 1) tinggi pemotongan batang sisa panen, 2) varietas, 3) kondisi air tanah setelah panen, dan 4) pemupukan. Penelitian ini bertujuan untuk menganalisis faktor yang mempengaruhi produksi padi salibu pada daerah Sumatera Barat. Pengumpulan data dilakukan melalui metode survai dan pengamatan langsung di lapangan. Pengamatan dilakukan terhadap kondisi air tanah setelah panen, tinggi pemotongan batang padi sisa panen, varietas, dan produksi lahan. Lokasi penelitian adalah beberapa daerah di Propinsi Sumatera Barat yang diambil secara acak. Data hasil pengamatan dianalisis sidik ragamnya yaitu one way anova dengan post test uji Duncan  pada taraf α = 0.05.  Hasil yang diperoleh pada penelitian ini yaitu waktu panen dan tinggi potongan batang padi sisa panen berpengaruh nyata terhadap jumlah anakan padi salibu. Kondisi air tanah pada saat panen berpengaruh pada produksi lahan. Kadar air yang optimum saat panen adalah kondisi lembab

Development of Aerial Online Intelligent Plant Monitoring System for Oil Palm (Elaeis guineensis Jacq.) Performance to External Stimuli

Researches in bio-robotics fields have been done en-masse. Development in intelligence monitoring systems for agricultural application have unfold the possibility to observe individual plant response upon receiving external stimuli. In this study, artificial bio pores, 30 cm in diameter, were introduced to the ranges of oil palm trees in three commercial plantations. Various applications methods of bio pores, in particular depths and numbers per plant were investigated. The bio pores drilled around the root zone of the trees using an earth auger, and filled with chopped semi-decomposed fronds and midribs from the plantation maintenance (pruning). A robotic quadcopter drone with 2.7K camera, operated with pre-set flight-plan, employed to record the crown image of oil palm trees under observation. The drone flown at the altitude of 23±0.1 meters above the crown, recording each crown individually. Focus and setting of drone’s cameras was set to automatic, enabling unbiased image recording. The weather conditions (sun radiation, cloud covering, wing speed) upon images recording were measured and recorded. When recording the images, the drone’s GPS-assisted hovering system maintained its position in both axes (horizontal and vertical), producing identical image acquisition for each crown. All plants’ crown was observed at 0, 30, 60, and 120 days after bio pores introduced. Image processing software was developed to segment and extract vegetation index (Vis) information from the images. Plants’ morphological conditions (height, radial, and new leaf) were measured and analyse by statistical methods to understand various bio pores applications influences to plants development. Crown images were processed, and its features extracted and correlated with chlorophyll in leaves. Models developed to predict chlorophyll contents (A, B, and Total) in crown and Vis analyses methods were used to compare individual plant responding to this external stimulus by means of rotational-pivot charts. Results showed that intensive bio pores introduction promote plant’s radial development and the emergence of new leaves. Furthermore, chlorophylls contents in leaves of plants with substantial bio pores applications were greater compared to normal plants.  Models showed that optical features extracted from crown images obtained high coefficient of correlation (R2) with leaves chlorophyll contents. This study has paved the way for wisdom agricultural application in Indonesian oil palm industry

Analysis Of The Effect Of Supervision, Leadership, And Compensation On Employee Performance At The SUMUT DPRD Office

This study aims to find the effect of supervision, leadership and compensation on employee performance at the North Sumatra DPRD Office. Does leadership partially have a positive and significant effect on employee performance at the North Sumatra DPRD Office. Does compensation partially have a positive and significant effect on employee performance at the North Sumatra DPRD Office. Do supervision, leadership and compensation simultaneously have a positive and significant effect on employee performance at the North Sumatra DPRD Office. The research method is causal associative research with the help of the SPSS Version 25 programme. This research uses multiple linear regression. The population in this study were 80 respondents. The sample in this study were 80 respondents. Primary data collection using a questionnaire. The results showed that supervision partially had a positive and significant effect on employee performance at the North Sumatra DPRD Office. Leadership partially has a positive and significant effect on employee performance at the North Sumatra DPRD Office. Compensation partially has a positive and significant effect on employee performance at the North Sumatra DPRD Office. Supervision, leadership and compensation simultaneously have a positive and significant effect on employee performance at the North Sumatra DPRD Office