A field study was undertaken to extrapolate the impact of foliar application of potash and its spray schedule on yield and physical and chemical parameters of sweet orange cv. Jaffa at experimental orchard, Department of Horticulture, CCS Haryana Agricultural University, Hisar. The results revealed that foliar application of KNO₃ at both the doses (2 and 4%) was found significantly or marginally better than K₂SO₄ (1.5 and 3.0%) and control (water spray) in increasing the juice content. Peel content, peel thickness and rag content was found to be influenced significantly due to different treatments on K and its spray schedule. Minimum rag content (38.11%) was recorded with foliar application of KNO₃ at the rate of 4% and maximum with control. Ascorbic acid and acidity were found maximum with two foliar applications of KNO₃ at the rate of 4% in the last week of April and August. Foliar application of KNO₃ at the rate of 4% was found most effective in increasing yield of sweet orange over control and other K treatments. Spray of K in the last week of April, May and August was found superior in increasing yield closely followed by two sprays in the last week of April and August. The findings signify the importance of K spray in enhancing yield and quality of sweet orange under semi-arid north western conditions of India.
An investigation to evaluate the effect of foliar application of potassium and its spray schedule on yield and yield parameters in sweet orange cv. Jaffa was undertaken at experimental orchard, Department of Horticulture, CCS Haryana Agricultural University, Hisar during the year 2014-15. The results revealed that the foliar application of potassium nitrate at the rate of 2 and 4 % and potassium sulphate at 1.5 and 3.0 % significantly improved average fruit weight, fruit diameter, percentage of medium and large fruits, and fruit yield of sweet orange cv. Jaffa over control (water spray). The trend was vice-versa on the percentage of small fruits. The number of fruits per plant could not differ significantly due to various treatments. Among K sources and doses, foliar application of KNO 3 at 4 % exhibited superiority over other treatments with respect to yield and yield parameters followed by KNO 3 at lower dose (2 %) or K 2 SO 4 at higher dose (3 %). Among various spray schedules, application of three sprays of K in the last week of April, May and August were found superior or at par in improving yield and yield parameters with 2 sprays in the last week of April and August. The fruit yield was recorded the highest (76.90 kg/plant) with a combination of the foliar application of KNO 3 at 4 % and 2 sprays in the last week of April and August which was nonsignificant with KNO 3 with an additional spray in the last week of May. The findings signify the importance of K spray in improving yield and yield parameters of sweet orange under semi-arid climatic conditions of north western India.
The experiment was undertaken to extrapolate the effect of hot water seed treatment comprised of different ranges of temperature (47-49, 50-52 and 53-55°C) and different duration of time (30, 45 and 60 min.) on seed quality parameters and seedling growth parameters in bell pepper (Capsicum annuum L.) cv. Solan Bharpur. The aim was to improve seed quality parameters and seedling growth parameters in nursery. Results showed that under in vitro conditions, the hot water treated seed with temperature 50-52 °C for 30 min. showed maximum germination, seedling length, seedling dry weight, seed vigour index-I and seed vigour index-II as compared to untreated seeds (control). In nursery conditions, same treatment, viz. temperature 50-52 °C for 30 min. showed maximum values w.r.t. total emergence, seedling height, seedling dry weight, seed vigour index-I and seed vigour index-II as compared to control.
A field study was undertaken to investigate the effect of auxin sprays on fruit size and quality of sweet orange (Citrus sinensis L.) cv. Pineapple during the year 2015–16 at the experimental orchard of the University. Exogenous application of 2,4-D @ 20 ppm and NAA @ 50 ppm at the end of April and July increased the percentage of medium size fruits, average fruit weight, number of fruits per plant and fruit physical quality with respect to peel thickness and peel content. However, chemical quality in terms of TSS, acidity and ascorbic acid was not affected by any treatment and spray schedule. The foliar application of 2,4-D 20 ppm at the end of April and July gave highest additional income over control.
Vrikshayurveda a classical science of botanical field, this science deals with growth and development of plants. This science mainly suggests uses of Kunapa jala and Pancha gavya for the high productivity of crops. This concept works around organic farming for effective plant growth. Vrikshayurvedha mentioned Kunapajala as organic liquid manure which is a fermentation product and acts as plant nutrients. There are two types of Kunapajala mainly in practices viz; herbal and non-herbal which is prepared according to the procedures described in Vrikshayurvedha. Considering importance of this we planned a study to investigate role of Vrikshayurvedha concept for the development of medicinal plant; Shalparni. Present study investigated role of Kunapajala in the growth and % yield of plant Shalparni. This study observed that Kunapajala treatment offered best response with respect to root yield and soil physico-chemical parameters. Kunapajala increased plant yield quantitatively as well as qualitatively.
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