<p>Corn is an important crop. Potency of corn productivity in Indonesia are still low. Main obstacles of increasing corn productivity is convertion of fertile land into non agriculture interest. the increase of corn productivity can be done by administrating NPK fertilizer and hybrid variety. This research is aiming at deciding and analyzing the effect of NPK fertilizer administration and hybrid corn variety towards growth and result. This research was held in June to October 2017, at Srimartani Village, Piyungan Districts, Bantul Regency, Daerah Istimewa Yogyakarta with regosol soil type and land altitude around 80 meter above sea surface. This experiment arranged in split plot design by factorial. Experimented factor are two corn hybrid variety ABCD and EFGH (main plot) with three doses of NPK fertilizer 200, 300 and 400 kg ha<sup>-1</sup> (sub plot). The result of research show that there are responds in two variety towards NPK fertilizer dosage almost same (unreal interraction). ABCD and EFGH variety reach highest result of height and component at 300 kg ha<sup>-1</sup>doses. Variable of cob weight with husk, cob weight without husk, cob length, total row, dry pipilan weight per plot, 100 seeds weight, fresh stover wieght, dry stover weight, harvest index and yield per hectare the highest average is variety of EFGH. NPK fertilizer dosage 300 kg ha<sup>-1</sup> is the best amount to optimally increase the growth and yield of hybird corn (8,92 ton ha<sup>-1</sup>). EFGH variety with 300 kg ha<sup>-1</sup> NPK fertilizer dosage can increase the potency of hybird corn yield. EFGH variety is showing better results (9,26 ton ha<sup>-1</sup>). </p>
The study aimed to determine which substrate and nutrition that gives the best result in improving growth and yield of Capsicum frutescens. The study design using CRD (completely randomized design) with two factors, namely substrates (6 levels: charcoal husks, fractional tiles, fractional bricks, arenga fiber, beach sand, husk steamed) and nutrition (2 levels: standards, standards with NPK). The study was conducted October 2015 until March 2016 in screen house Faculty of Agriculture, Sebelas Maret University. Data were analyzed using analysis of variance and if significant difference continued with DMRT (Duncan Multiple Range Test) level of 5%. The results showed that the kinds of substrates significantly affect all variables of Capsicum frutescens (plant height, leaf number, branch number, total interest, diameter trunk, root length, root volume, fresh weight of plants, plant dry weight, fruit weight and number of fruit), and the addition of NPK nutrition significantly affect variable leaf number, branch number, and fresh weight of plants.
<p>Maize (Zea mays L.) is the second most important cereal crop of Indonesia after rice. The productivity of corn in Central Java province in 2015 was increased that considered as relatively low. Maize productivitiy needs to be improved to supply the requirement of people through of plant spacing and use the hybrid maize varieties. The aims of study was to determine the effectiveness level of plant spacing, to test the best hybrid maize varieties, and test the combination of two treatments to optimize the yield potential hybrid maize. This study has been conducted from June until October 2017, at Desa Srimartani, Kecamatan Piyungan, Kabupaten Bantul, Daerah Istimewa Yogyakarta. This study was arranged in Split Plot Design consisting of two factors that have been researched, varieties (ABCD, EFGH, NK6172, P27 and DK77) and plant spacing (70 x 20 cm, 75 x 20 cm, and 75 x 25 cm). The results show that treatment of varieties mostly can increase all of variable analysis but there is no interaction on both treatment except plant height, fresh and dry biomass weight. Variable of plant height, tasseling and silking, cob weight with husk, cob weight without husk, kernel seeds weight per plot, 100 seeds weight, yields per hectare show that the highest average is variety of P27. While treatment of plant spacing has no effect because the interval between treatments plant spacing is too close therefore it shows insignificantly different result. The highest dry kernel product on variety treatment P27 (8,82 ton ha-1), followed by DK77 (8,53 ton ha-1), ABCD (8,50 ton ha1), NK6172 (8,34 ton ha-1), and EFGH (7,13 ton ha-1).</p>
<p>Corn (Zea mays) is a primary source of food after rice, considered as cerealia crops. This research to analyzing about growth and yield of several variety of hybrid corn on phospat fertilizer dosage giving because in Indonesia the land is nutrient-deficient phospat. This research has been held on June until October 2017 in Kecamatan Piyungan, Kabupaten Bantul, Daerah Istimewa Yogyakarta. Plan which used in this research are Split Plot Design which consist of 2 factors which observed three varieties of hybrid corn (ABCD, EFGH and IJKL) as main plot and phospat fertilizer dosage giving (0, 100 and 150 kilogram ha) as sub plot which repeated three times. Research fact found that the topography of the research field is 40% of the plains with a slope of less than 2% and 60% of hilly areas with a slope above 40.1% and the type of the soil is regosol with the highest temperature recorded at the study site was 32ºC with the lowest temperature of 23ºC, then phospat fertilizer dosage is strongly influence the growth and yield of each hybrid corn variety. The best dosage of fosfat fertilizer for corn growth is 150 kilogram ha on each variety, which are ABCD variety, EFGH, and IJKL. The best habit of the growth and yield of hybrid corn is on the phospat fertilizer dosage giving at 150 kilogram ha with variety EFGH.</p>
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