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Koentjoro, Yonny
Universitas Pembangunan Nasional "Veteran" Jawa Timur

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APLlKASI PEMBERIAN ZAT PENGATUR TUMBUH PMDATANAMAN CABAl KECIL YANG DITANAM DI MUSIM HUJAN Koentjoro, Yonny
MAPETA Vol 10, No 3 (2008): MAPETA
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High percentage of fall ing of flower and fruit of chilli plant in rainy season represents problems which often occurs so that productivity of chilli very low in the rainy season and often caused failure on fruit set. The aim of this research is knowing the influence of plant regulator in increasing the productivity of chilli plant which is cultivated at off season (rainy season). This research was designed using Random Block Design which consist of 2 factors. The first factor is Ethrel with 4 levels giving; 0 ppm / I, 250 ppm / I, 500 ppm / I and 1000 ppm / I and the second factor is Dekamon with also 4 levels giving; 0 cc / I, 0.5 cc / I, I cc / I and 2 cc / 1. Results of research indicate that the plant growth regulator application Dekarnon and Ethrel effecting on all variables observed both generati ve and vegetative variables, in general, at all levels of concentration of the plant growth regulator which is applied result the linier positive influence. Research also shows there is no influence significantly of the interaction between the two plant growth regulator. Key words: Zat pengatur tumbuh, musim hujan, cabai kecil
KAJIAN KONSENTRASI DAN LAMA PERENDAMAN COLCHICINE TERHADAPJANAMAN TOMAT (Solanum Iycopersicum. L) Dewanti, F. Deru; Koentjoro, Yonny; -, Moegijanto
MAPETA Vol 2, No 5 (2000): MAPETA
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The using of chemical materials on plant could be increasing or decreasing on production of plant, studies of it is often written on many scientific magazines with variation results. Colchicine as mutagent could Influence on several growth processes of plant e.g. : elongation cell and duplication cromosome of cell processing. This research is arranged in Completely Randomized Design with two factors and three times replcation, LSD test 5 % is used to compare the difference of every treatments. As the first factor is Concentration of Colchicine With four levels are: KO(0.00 % Colchicine), K1 (0.1 % Colchicine), K2 (02 % Colchicine) and K3 (0.3 % Colchicine), as the second factor is period of soaking of tomato seed with four levels are L1 (24 hours), L2 (48 hours), L3 (72 hours) and L4 (96 hours). Results of this research shown that there were significant Interaction between Concentration Colchicine an period of soaking on normal seedling percentage, time of seedling, height of plant on 30 days after planting, number of leafes on 58 days after planting, flowering age. Keywords :Tomato, concentration, colchicine
STUDI CEKAMAN AIR TERHADAP PENAMPILAN BEBERAPA VARIETAS TANAMAN TOMAT (Lycopersicum esculentum, Mill.) -, Mulyanto; Koentjoro, Yonny
MAPETA Vol 2, No 5 (2000): MAPETA
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Almost every chemical processes in plant growth is always affected by water, in under field capacity condition of soil water contain often cause decreasing on plant growth and production, Because of its water could become very important factor and as limiting factor. Performance of plant is always controlled by interaction between charaters of genetic and environment condition. Every variety of plant'has different responses on environmental stress treatment, included water stress condition. This research is arranged in Completely Randomized Design with two factors and three times replication, Duncan test 5 % is used to compare the difference of every treatments. As the first factor is Water Stress with three levels are: C1 ( 75 % field capacity), C2 (100 % field capacity) and C3 (125 % field capacity) and the second factor is Variety of tomato with five levels are V1 (Sragen variety), V2(Lanjar Blitarvariety), V3 (LV 4066 variety), V4 (Jamaica Cherry variety) and V5 (Sinoloa variety). Results of this research shown that there were significant interaction between water stress treatment and variety on helqht of plant at 34, 44 and 54 days after plant and dry weight of plant. Sragen variety has tendency to adapted well on water stress treatment. Key words: Water Stress, Variety