The nutrient is one of the vital factors that helps in the growth of crops. A field experiment was conducted to study the performance of potatoes at the different phosphorous levels and mulch from February to June 2021 in Dhamkane, Bajura district, Nepal. The experiment was arranged in two factorial RCBDs with 3 replications and 8 treatments. Bajura local variety was used. Four levels of phosphorous 0, 50, 100, and 150 kg ha-1 were used and for mulching, silver on black plastic mulch and no mulch (control) was used. It was observed that both mulching and phosphorous levels influenced the growth and yield of potatoes. Plant height (39.90 cm), number of leaves (439.98) was significantly highest in silver in black plastic mulch whereas haulm number was significantly highest in no mulch condition. In the same way, significantly highest plant height (44.36 cm), haulm number (4.15), and the number of leaves (442.10) were found on 100 kg ha-1 P level. The main effect of mulching and phosphorous level was found to increase the yield but no interaction was observed. The highest average tuber weight, yield per plant and number of tubers per plant were found on silver in black plastic mulch. Average tuber weight is highest at 150 kg ha-1 phosphorous level. The number of tuber per plant was highest for silver on black plastic mulch and 100 kg ha-1. Marketable and non-marketable tubers were significantly higher at silver on black plastic (8.55 & 3.1) and 100 kg ha-1(10.45 & 3.46). The overall performance was superior in silver on black plastic mulch and 100 kg ha-1 P level with significant B: C ratio.
An experiment on the effect of different nitrogen levels on yield and yield attributes of different rice varieties was conducted in Kanchanpur, Nepal, from March 2021 to July 2021. The experiment was laid in randomized complete block design with two factors: nitrogen levels and rice varieties, each factor having three levels (Nitrogen: 60kg/ha, 120kg/ha, and 180kg/ha and rice varieties: Hardinath 1, Hardianth 3 and Chaite 5) resulting in nine treatment combinations. Rice seeds were sown directly in experimental plots under the dry condition on March 24, 2021. The plant spacing was 20x20cm^2. Growth parameters, grain yield, and yield attributing traits of rice were recorded. The statistical results revealed significant differences between the treatments regarding agronomical parameters, yield attributing characters, and grain yield. The results indicated that the 180 kg/ha level of N application contributes to the higher plant height (74.502 cm), the number of tillers (1101.667), effective tillers (577.222), filled grain per panicle (116.490), panicle length (25.241 cm), grain yield (4.7 ton/ha) and straw yield (10.564 ton/ha). Among the varieties, Hardinath 3 produced significantly higher plant height (79.68 cm), panicle length (25.68cm), sterility percentage, and 1000 grain weight (24.60g) as compared to Hardinath 1 and Chapter 5, respectively. However, yield and yield attributing characters like grain yield, straw yield, effective tillers, and filled grains per panicle were significantly higher in Chaite 5. Therefore, a nitrogen level of 180 kg/ha and variety Chaite5 may be used for better productivity in Kanchanpur, Nepal.
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