Faculty of Agriculture, Universitas Sebelas Maret (Publishing Systems)
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Pengaruh Kualitas Seresah Pangkasan Gliricidia maculata (Gamal) dan Salacca Edulis (Salak) terhadap Penghambatan Nitrifikasi dan Efisiensi Pemanfaatan N di Alfisols
Full text linkTitle : The Effect of Litter Quality of Gliricidia maculata and Salacca edulis to Inhibition of Nitrification and Efficiency N Benefit in Alfisols. This research was carried out from august 2008 to February 2009. The purpose of this research were to know the effect of litter quality of Gliricidia maculata and Salacca edulis to inhibition of nitrification and efficiency N benefit in Alfisols.This research was field research with Randomized Completely Block Design (RCBD) one factor with 11 treatments that repeat 3 times become 33 trial units. This treatment use control, without litter quality + N manure, Gliricidia maculata with dose 5, 10, and 15 ton/ha + N manure, Salacca edulis with dose 5, 10, and 15 ton/ha + N manure, and combination with dose 5, 10, and 15 ton/ha + N manure. To know the effect of treatment with variable used F test 1 % and 5 %. To know the difference between treatments used DMRT 5 %. Database analysis was used Minitab, Excel, and SPSS software. The result of this research showed that the litter quality of Salacca edulis (low quality) and Gliricidia maculata (high quality) not significant inhibit and decrease nitrification. This result can be known from the effect test of potential nitrification, concentration of NH4+ and NO3- that not significant. The average of efficiency N benefit each litter quality are 0.59 % at litter quality of Gliricidia maculata (high quality), 0,669 % at litter quality Salacca edulis (low quality), and 0,667 % at litter quality of combination between Gliricidia maculata and Salacca edulis
Status Unsur Hara Ca,Mg, dan S sebagai Dasar Pemupukan Tanaman Kacang Tanah (Arachis hypogaea L.) di Kecamatan Punung Kabupaten Pacitan
Full text linkTitle : Nutrient Status Ca, Mg, and S as The Basic Fertilizing of The Groundnut (Arachis hypogaea L.) in Punung, Pacitan. The research was done in May until October 2008. The aims of this research were to know the status of soil N, P, K and determine the fertilizing and the soil management strategy for peanut in Punung, Pacitan. This research used fenomenological qualitative descriptive method that supported by laboratory analysis and cuisioner about agriculture activity by the farmers at Punung. The research soil variables are pH, organic-C, N total, P available, K available, CEC, base saturation, and soil tekstur. The result of this research shows that the globally available Ca soil status in Punung is medium (6,08-7,87me%), avalaible Mg soil provided status globally is high(4,05-5,25me%) , and S soil provided status globally is also very low. S nutrient must be added Land Map Unit (LMU) 2, 5, 9, 14, 15 to reach yield 2 ton/ha and 2,5 ton/ha of groundnut. Soil management strategy is done by adding S fertilizer adjusted with the plant need by drowning it into the soil nearby the root area with two times fertilizing, ZA fertilizer addition to keep S supply, the addition organic matter, the use of mulsa, plant rotation and soil management adjusted tho the slope condition
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