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The study was expected to provide information poly ethylene glycol (PEG) concentration that can be used for plant breeding base rice (Oryza sativa L.) plant. The research was conducted covering two experimentals stage, were (i). Tests of dry stress resistance of six cultivars of rice using PEG 6000, and (ii). Emerged test seeds of six rice cultivars that have been subjected to dry stress with PEG 6000. The treatments were designed based on a complete randomized design of two factors. The first factor used six cultivars of rice were cv.Mekongga, cv. Way Apo Buru, cv. Sidenuk, cv. Pepe, cv. Ciherang and cv. IR64. and the second factor was dry stress [(0, 5, 10 and 15) % of PEG] with replicates three times. The higher concentration of PEG lowered growth rate (GR), emergence rate (ER), germination energy (GE) and the relative germination rate on all cultivars of rice. Germinate the longer time, appropriate concentrations of PEG. Test of pre-emergence on soil giving the mixed response on all cultivars of rice and PEG level. Cv. Mekongga, cv. Sidenuk, cv. Pepe and cv. Ciherang have the ability to grow on soil test. Canopy and root length highest on cv. IR64. Cv. Sidenuk popularity score can be classified moderate tolerance, while cv. Pepe that was sensitive to drought stress.

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The objective of this research is to assess the growth and physiological characteristics of lettuce in the delivery of different N-organics. Research was conducted at Faculty of Animal and Agricultural Sciences, Diponegoro University, Indonesia. The materials used were seeds of lettuce (Lettuce sativa L) on Oxisol soil types, with the total N content of 0.18 %, P (18 mg. g -1 ), K (23 mg. g -1 ) and C (1.52 %) were utilized. The organic fertilizers applied were cow-, sheep-, and guano manures, and compost and green manure (Leucaena leucocephala). The experimental design was a randomized block design with four replications and five treatments. The treatment dose of fertilizer applied is equivalent to 100 kg N / ha, namely: cow-manure ; sheep-manure; guano manure ; compost and green manure. Green manure, set into the ground is Leucaena leucocephala. The variables measured were the number of leaves, leaf area, leaf area index(LAI), the rate of photosynthesis, Chlorophyll total, anti-oxidant activity, fresh weight of lettuce per plot. The data obtained were analyzed using an ANOVA followed by the Duncan test. Guano fertilizer provided the most excellent effect on leaves, LAI, the rate of photosynthesis and biomass lettuce. Fertilizers derived from animal manure (guano, cattle, goats) gave a more excellent effect on the rate of photosynthesis of plants. Compost origin gave the lowest effect on leaf area, LAI, and the rate of photosynthesis. The number of leaves, total chlorophyll, and antioxidant content were not influenced by the different organic N fertilizers.

Pertumbuhan dan hasil Kailan (Brassica oleracea var. Alboglabra) pada berbagai dosis pupuk kambing dan frekuensi pemupukan NitrogenGrowth and yield of Kale (Brassica oleracea var. Alboglabra) on several doses of goat manure and Nitrogen fertilizing frequency ABSTRACT Goat manure is an organic fertilizer that provides nutrients and improves soil physical properties, but organic fertilizer has poor nitrogen content so it needs continued nitrogen fertilizing. Urea can fulfilled nitrogen nutrient for kale. Urea can easily los so that the right frequency is needed. This research aimed to identify the effect of several doses of goat manure and application of nitrogen fertilizer on different frequency on growth and yield of kale (Brassica oleracea var. Alboglabra). The research used factorials experiment 4 x 3 with Randomized Complete Block Design (RCBD) consisting of 3 replications. The first treatment was several doses of goat's feces fertilizer such as K0: 0 ton/ha, K1: 10 ton/ha, K2: 20 ton/ha, K3: 30 ton/ha. The second treatment was different nitrogen fertilizing frequency such as N1: one time (2 Week After Planting), N2: two times (2, 3 Week After Planting), N3: three times (2, 3, 4 Week After Planting). The results showed that dose of goat manure in 30 tons/ha produces the highest significantly response to production of kale. Nitrogen fertilization frequency three and two times both gives the best results on plant height, number of leaves, and canopy wet weight. There was no effect of both the dose of goat manure and the frequency of nitrogen fertilization on ANR levels. This research was concluded that the dose of goat manure 30 tons/ha and nitrogen fertilizing frequency twice, showed the most effective growth and yield of kale.