This study aims to determine the effect of soil cultivation and nitrogen fertilizer dosage on the growth and yield of maize (Zea mays L.). This study used an experimental method with a Split Plot Design using 2 factors, namely soil cultivation (P) as the main plot consisting of 3 levels, namely p0 (without soil cultivation), p1 (minimum soil cultivation), p2 (perfect soil cultivation. ). The dose of nitrogen fertilizer (N) as subplots consists of 3 levels, namely n0 (0 kg ha-1 N), n1 (90 kg ha-1 N) and n2 (180 kg ha-1 N). The results showed: 1) there was an interaction between soil cultivation and nitrogen fertilizer dosage on plant height at 4 and 6 MST, and ear length, where complete soil treatment and nitrogen fertilizer dosage of 180 kg / ha (p2n2) gave the best results. 2) The effect of independent soil treatment and nitrogen fertilizer dosing on the observation of plant height at 5 WAP, and number of leaves at 4.5 and 6 WAP. The best results were found in p2 (Perfect Soil Treatment) and n2 (180 kg ha-1 N) treatments.
The aim of the study was to determine the appropriate age and number of seeds for the transfer process (Tapin) from the nursery to the planting area in order to obtain high growth and yield of black rice.This research was conducted in Lemah Duhur irrigated rice fields, Kiangroke Village, Banjaran District, Bandung Regency, West Java Province.This study used an experimental method with Split Plot Design using 2 factors, namely seed age (U) as the main plot consisting of 4 levels, namely u1 = 10 days after sowing, u2 = 15 days after sowing, u3 = 20 days after sowing scatter and u4 = 25 days after scatter. The number of seeds per planting hole (J) as child plots consisted of 4 levels, namely j1 = 1 seed per planting hole, j2 = 3 seeds per planting hole, j3 = 5 seeds per planting hole and j4 = 7 seeds per planting hole.Parameters observed were: number of tillers per clump, number of panicles per clump, weight of harvested dry unhulled (GKP) per clump, weight of dry harvested unhulled (GKP) per plot, weight of dry milled unhulled (GKG) per plot.The results showed that there was no interaction between the treatment of seed age and the number of seeds operted in the planting hole for all observation parameters. The highest average number of panicles per clump was found in u2j1, the highest average weight of harvested dry grain per clump was found in treatment u4j1, the highest average weight of harvested dry grain (GKP) per plot was found in treatment u4j1, the average the highest average weight of dry milled grain (GKG) per plot was in the u4j1 treatment. Key words : seed age, seed number, black rice, anthocyanin, aleurone
The productivity of soybean nowadays is inversely related to the harvest area. The increasing area of ??soybean crops is not matched by production. Based on this, research was needed to increase soybean production, especially for soil types with low C/N ratio. The choice of this soil type is because soybeans are generally cultivated intensively. The current productivity of soybeans was low is one of which is thought to be due to a lack of organic matter and too fast nitrogen losses. The research was conducted in a demonstration plot (in a polybag in a plastic house) using a randomized complete block design, consisting of 7 treatments (A = control; B = 30 g vermicompost/polybag; C=60g vermicompost/polybag; D = 90 g vermicompost/polybag; E = 30 g poultry manure/polybag; F = 60 g poultry manure/polybag; G = 90 g poultry manure/polybag), with 4 repetitions. The results showed that the treatment of vermicompost and poultry manure significantly increased the growth and yield of soybean when compared to the control. A dose of 90 g poultry manure is recommended for applicated in farm because it can significantly increase soil C/N ratio, growth and yield of soybean.
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