Open Access Original Research Article

Spatial Distribution and Mapping of Available Micro Nutrient Status in Relation to Soil Properties of Tomato Grown Soils of Chikkaballapura District, Karnataka

P. N. Siva Prasad, C. T. Subbarayappa, A. Sathish

International Journal of Plant & Soil Science, Page 1-10
DOI: 10.9734/ijpss/2020/v32i1030331

GPS based soil survey was conducted in the tomato growing areas of Chikkaballapura district, Karnataka to map the soil fertility status by using Arc GIS 10.4 software. Seventy five surface soil samples were taken from the tomato growing areas of the district and analysed for texture, pH, EC, OC and micronutrients (Zn, CU, Fe, Mn, B) and zinc content in plant samples. The results revealed that the soils under investigation were acidic to alkaline in reaction, non saline, medium to high in organic matter content. All the studied soils were sandy loam to sandy clay loam in texture. DTPA extractable Zn, Cu, Fe, Mn and HWS-B varied from 0.07 - 6.87, 0.41-4.59, 2.08-28.92, 1.37-27.08 and 0.24-2.13 mg kg-1 respectively. Plant zinc ranges from 14 - 98 mg kg-1 inferring low to high in zinc concentration. The nutrient index was calculated for all the micronutrients and it is found to be medium. Among the micronutrients 48, 21.33 and 30.67 per cent samples were categorized as low, medium and high in available zinc status. These results indicated that Zn is likely to constraint tomato crop production in Chikkaballapura.

Open Access Original Research Article

Influence of Biostimulants on Yield and Quality of Dendrobium Orchid (Dendrobium Nobile Lindl.) var. Sonia-17 under Protected Cultivation

Pruthvi P. Hegde, B. C. Patil, N. K. Hegde, M. S. Kulkarni, Laxman Kukanoor, Mukund Shiragur, M. Harshavardhan

International Journal of Plant & Soil Science, Page 11-15
DOI: 10.9734/ijpss/2020/v32i1030334

An experiment was carried out at farmer’s field, Chapparamane during 2017-19 to know the efficacy of biostimulants on yield and quality of dendrobium orchid var. Sonia-17. Eight biostimulants in two combinations were taken for the study in comparision with Recommended dose of Fertilizers (30:10:10 at vegetative stage and 10:20:20 at flowering stage) as control. The results revealed that among the biostimulant treatments, the plants receiving Biovita (Brown seaweed extract) @ 1.5 per cent produced maximum number of spikes per plant, spikes per square meter and spike yield per 560 square meter (3.93, 55.67 and 31,170 numbers, respectively) with maximum number of florets per spike (9.74), spike length (45.89 cm) spike girth (4.10 mm), spike weight (30.06 g),  diameter of floret (9.14 cm) and enhanced vase life of 32.75 days compared to all other treatments and control.

Open Access Original Research Article

Effect of Different Soil Amendments and Variety on the Growth and Yield of Carrot (Daucus carota L.)

Patrick Atta Poku Snr, Joseph Sarkodie- Addo, Vincent Logah, Clement Gyeabour Kyere

International Journal of Plant & Soil Science, Page 16-25
DOI: 10.9734/ijpss/2020/v32i1030335

The objective for the study was to determine the effect of variety and different soil amendments on the growth and yield of carrot (Daucus carota L.). The study was conducted in Mampong-Ashanti which is located in the transitional zone of Ghana. The experiment was laid out in a 5 x 2 factorial and treatments arranged in Randomized Complete Block Design (RCBD). There were two varieties (Tokita and Kuroda) and five different types of soil amendment which were: control (T1), 5 ton/ha poultry manure (T2), 45-45-45 kg/ha NPK (T3), 5 ton/ha compost (T4) and 5 ton/ha biochar (T5). Each treatment was replicated four times. Data was collected on vegetative growth and yield of carrot. Data obtained were subjected to analysis of variance (ANOVA) using GENSTAT Version 11.1. Results from the study showed that carrot plants amended with 5 ton/ha poultry manure significantly (P=.05) produced the tallest height and greater number of leaves. Application of 5 ton/ha compost recorded the widest (P=.05) canopy spread. Application of 5 ton/ha poultry manure recorded the highest (p < 0.05) fresh root weight, root length, root diameter and marketable root weight with the control treatment recording the least among all treatments. With respect to variety, Kuroda produced the tallest (P=.05) plants, greater (P=.05) number of leaves and wider (P=.05) canopy spread. In conclusion, the application of 5 t/ha poultry manure had improved growth performance with higher productivity in terms of marketable root weight and total yield. Among the two varieties Kuroda was the best with higher growth performance and yield.

Open Access Original Research Article

Impact of Tillage and Vegetative Mulch on Growth and Yield of Maize under Ferralitic Soil Conditions in Southern Benin

Mahugnon Socrate Agonvinon, Alladassi Felix Kouelo, Tobi Moriaque Akplo, Julien Avakoudjo, Pascal Houngnandan, Hessou Anastase Azontonde

International Journal of Plant & Soil Science, Page 26-36
DOI: 10.9734/ijpss/2020/v32i1030336

Aims: Crop production is exposed to climate change phenomenon resulting in change in rainfall amount and long drought spells. Good conservation practices are important in yield improvement. This study aims to assess the effect of tillage and vegetative mulch on maize growth rate, yield and harvest index in ferralitic soil of southern Benin.

Study Design: The complete randomized block design (CRBD) with 4 repetitions was implemented.

Place and Duration of Study: The experimental site is located at Allada, in southern Benin, and conducted between May 2017 and July 2017.

Methodology: During this study, two factors were tested (Tillage and mulch) and 6 treatments have been obtained of combination of two factors level (No-tillage, tillage and 0%, 50%, 75% mulch). The growth parameters, yield parameters and harvest index were determined.

Results: The results indicated that tillage and mulching significantly influenced the growth rate, leaf surface and leaf number of maize plants. Tillage increased to 54% the grain yield compared to no tillage whereas 50% and 75% mulch promoted the highest grain yield. Considering the combination of tillage and mulching, LM50 (Tillage + 50% mulch) and LM75 (Tillage + 75% mulch) treatments resulted in about 85% increase of grain yield compared to direct seeding without mulch.

Conclusion: These results reflect the importance of soil cover in improving of maize productivity.

Open Access Original Research Article

Effect of Different Defoliants and Time of Application on Defoliation Percentage and Boll Opening Percentage in High Density Cotton (Gossypium hirsutum L.)

P. Chandrasekaran, V. Ravichandran, A. Senthil, L. Mahalingam, N. Sakthivel

International Journal of Plant & Soil Science, Page 37-45
DOI: 10.9734/ijpss/2020/v32i1030337

Aims: To evaluate the time and type of chemical defoliants to improve the mechanical and manual picking of high density cotton CO 17 in terms of higher defoliation and increase boll opening percentage.

Study Design: The study was performed in split plot design with seven treatments and four replications.

Place and Duration of Study: This field study was carried out in Department of Crop Physiology TNAU, Coimbatore during September 2019 to January 2020.

Methodology: Three time of defoliants application (120 Days After Sowing (DAS), 127 DAS and 134 DAS) for main plot and seven treatment levels of Control, 2, 4 D (0.5%), Ethephon (0.5%), Ethephon (0.5%) + TIBA (450 ppm), Sodium chlorate (0.9%), 6-BAP (0.1%), Thidiazuron + Diuron (0.03%) for sub plot.

Results: Defoliation percentage was significantly enhanced from 4 days after defoliants spray. Boll opening percentage also increased with defoliants spray when compared to control plants. Although a significant effect was observed on SPAD value, NDVI value and seed cotton yield.

Conclusion: From this study, application of Thidiazuron + Diuron (0.03%) and Sodium chlorate (0.9%) had significantly positive effect in per cent defoliation and boll opening percentage and it will work better in young cotton plants compare to mature one.

Open Access Original Research Article

Survival of Forest Species of the Caatinga in Ciliary Plantations in the State of Paraíba, Brazil

Maria José de Holanda Leite, Maria do Carmo Learth Cunha, Rafael Rodolfo Melo, Maria José Martins Fausto Almeida

International Journal of Plant & Soil Science, Page 46-51
DOI: 10.9734/ijpss/2020/v32i1030338

Riparian forests have peculiar characteristics in relation to architecture and flowering, which are intrinsically linked to the high water content of the soil and the air where they develop due to both the superficiality of the water table and periodic flooding. The aim of this research was to assess the survival or establishment of seedlings in the field through the collection of survival information in order to verify which species group(s) is most feasible for recovering of riparian forest in Caatinga areas. The riparian plantations were conducted in three rural communities from March to April, at the Riacho Trapiá, Rio Espinharas and Rio da Cruz rivers, municipality of Maturéia-PB, respectively for three years (2003, 2004 and 2005). Twenty-two native species were used, covering six pioneers, eight secondary, five climaxes and three of undetermined ecological group. The results showed that the pioneer and secondary species had better survival performance in the areas of riparian stand plantations, this may have occurred because they had the capacity to adapt in places with adverse conditions, which demonstrates their indication for recovering of riparian forest.

Open Access Original Research Article

Evaluation of Nematicidal Activity of Fluensulfone against Meloidogyne incognita in Bell Pepper Crop

José Alonso Calvo- Araya, Nery Zapata- Montes

International Journal of Plant & Soil Science, Page 52-59
DOI: 10.9734/ijpss/2020/v32i1030339

The evaluation of nematicidal activity of the non- fumigant nematicide (fluensulfone) was evaluated for the control of the root-knot nematode Meloidogyne incognita in bell pepper crop (Capsicum annuum L.) under field conditions. The experiment was set up under a randomized complete block design with four replications. Six treatments were assessed for control of M. incognita: four doses of fluensulfone, one of the nematicide oxamyl and a control without application of nematicides. Ten days before transplanting, nematicides were applied in a single application via irrigation systems. The lowest final population densities of M. incognita in bell pepper crop were recorded in plots treated with fluensulfone at the dose of 2.75 L.ha-1, with an average of 25 juveniles. The higher percentage of efficacy was obtained with the application of fluensulfone at a dose of 2.75 L.ha-1. Fluensulfone showed a more efficient nematicidal activity as compared with oxamyl, which is the most used nematicide in horticultural crops in Mexico. Our results indicated that fluensulfone can be used as an alternative nematicide for the control of M. incognita in horticultural crops.