Open Access Original Research Article

Standardization of Seed Coating Polymer in Pigeonpea (Cajanus cajan L.)

Mallikarjun G. Handiganoor, S. B. Patil, S. N. Vasudevan

International Journal of Plant & Soil Science, Page 1-6
DOI: 10.9734/IJPSS/2017/37332

Laboratory experiment was conducted with the objective to standardize the seed coating polymer in Pigeonpea (Cajanus cajan L.). The experiment consisted of five different dosages of polymer (P) along with a control viz., P1: Control, P2: polymer @ 2 ml per kg of seed, P3: polymer @ 4 ml per kg of seed, P4: polymer @ 6 ml per kg of seed, P5: polymer @ 8 ml per kg of seed, P6: polymer @ 10 ml per kg of seed. Among the treatments imposed, seed coating polymer @ 8 ml/kg of pigeonpea seeds recorded significantly higher germination, speed of germination, shoot length (cm), root length (cm), seedling dry weight (mg/seedling) and seedling vigour index (SVI) as compared to control. However, seed coating polymer @ 8 ml/kg of seed was significantly not different with the results obtained by seed coating polymer (@ 10 ml/kg and @ 6 ml/kg respectively) of seed. Therefore, the polymer @ 6 ml/kg of seed was found to be economically feasible over all the treatments.

Open Access Original Research Article

Correlation and Regression Analysis of Viability and Vigour Parameters in Coriander (Coriandrum sativum L.)

Pradeep Singh, V. S. Mor, Sunil Kumar`, Axay Bhuker

International Journal of Plant & Soil Science, Page 1-8
DOI: 10.9734/IJPSS/2017/37222

In the present investigation freshly harvested seeds of four genotype of coriander viz., DH-228, DH-246, DH-5 and DH-36 were subjected to study the effect of foliage cuttings and growth regulators on seed yield and seed quality of coriander. Correlation coefficient analysis was employed to find out the correlation and regression analysis of various viability and vigour parameters in coriander viz., standard germination, seedling length, seedling dry weight, vigour index-I, vigour index-II, electrical conductivity, dehydrogenase activity test, field emergence index and seedling establishment. Seedling establishment is positively and significant correlated with Seedling dry weight (0.884**) followed by vigour index-II (0.883**) and whereas, electrical conductivity was found negatively and significant correlation (-0.560**) with the seedling establishment.  The maximum value of coefficient of regression (0.781) was obtained for seedling dry weight followed by vigour index-II (0.779), vigour index-I (0.631), dehydrogenase enzyme activity (0.618), field emergence index (0.556), standard germination (0.525), seedling length (0.440) and electrical conductivity (0.313), as these tests are highly correlated with seedling establishment. The maximum value of coefficient of regression (0.931) was found for dehydrogenase enzyme activity followed by seedling length (0.911) and minimum value (0.409) of coefficient of regression was found for standard germination by the only interaction with foliage cuttings, whereas, interaction with growth regulators was found the maximum value of coefficient of regression (0.818) was found for seedling dry weight followed by vigour index-II (0.815). Among all the seed quality parameters seedling dry weight, vigour index-II and standard germination were found highly correlated with seedling establishment for all the genotypes hence they can be used as reliable predictors of seedling establishment.

Open Access Original Research Article

Efficacy of Biostimulants on Growth, Flowering and Quality of China aster cv. Kamini

D. B. Vinutha, B. Hemla Naik, S. Y. Chandrashekar, G. N. Thippeshappa, Y. Kantharaj

International Journal of Plant & Soil Science, Page 1-5
DOI: 10.9734/IJPSS/2017/38005

This study was conducted to determine the effect of biostimulants on growth, flowering and quality of China aster cv. Kamini with thirteen treatments such as two concentrations of biostimulants sprayed at four frequencies (first, second, third and fourth spray at 45, 60, 75, 90 days after transplanting) and untreated control. Each treatment was replicated thrice in randomized complete block design (RCBD). The parameters such as plant height (cm) no. of leaves, leaf area (cm2), stem girth(mm), no. of primary branches, no. of secondary branches and total dry weight of plant(g) were checked as growth parameters. Moreover, days taken for first flowering, days to 50% flowering  and duration of flowering are the checked flowering parameters whereas shelf life of loose flowers (hrs), vase life of cut flowers (days), stalk length (cm), flower weight (g) and flower diameter (cm) are the flower quality parameters. Among the different treatments, GA3@ 200 ppm (T1) registered maximum plant height (65.07 cm), number of leaves (115.67) and leaf area per plant (4259.30 cm2), stem girth (12.71 mm), number of primary (9.73) and secondary branches (13.00), total dry weight per plant (45.03 g). Regarding the flowering parameters; among different treatments, minimum number of days to first flower bud initiation (59.00) and 50 per cent flowering (73) was recorded with GA3 @ 200 ppm (T1). However, control (T13) recorded minimum. As to the flower quality parameters, shelf life and vase life was recorded maximum (41.00 hours and 8.17 days) by Azospirillum @ 8 per cent (T12) and Biovita @ 1 per cent (T8), respectively. Also, the maximum stalk length (27.50 cm) was observed with GA3 @ 200 ppm (T1). The highest flower weight (2.40 g) and flower diameter (7.39 cm) was observed with Azospirillum @ 8 per cent (T12).

Open Access Original Research Article

Soil Chemical Properties and Plant Nutrient Status as Influenced by Application of Lime, Phosphorus and Compost

Dereje Shanka, Nigussie Dechassa, Eyasu Elias, Setegn Gebeyehu

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2017/37006

Declining soil fertility along with soil acidity are major soil degradation problems affecting crop production in Ethiopian highlands. However, little effort has been done to investigate different soil amendment measures on soil chemical properties and nutrient status of common bean crop on acid soils of Areka. Therefore, field studies were conducted with the objective of investigating the effects of combined application of compost, lime and P-fertilizer on selected soil chemical properties and plant nutrient concentration of common bean at Areka area of southern Ethiopia. Treatments, consisted of factorial combinations of three rates of compost (0, 5 and 10 t ha-1), lime (0, 0.64 and 1.28 t ha-1) and phosphorus (0, 23 and 46 kg P2O5 ha-1) were laid out in a randomized complete block design with three replications. Data on several soil chemical properties and tissue nutrient status were collected. The results revealed that relative to the control treatment, the application of 10 t ha-1 of compost alone increased soil pH and nitrogen by 7 and 68% in Belg and 7 and 77% in the Meher seasons, respectively. Similarly, sole application of lime increased soil pH by 20 and 10% in Belg and Meher seasons, respectively. The application of compost at the rates of 5 t ha-1 also resulted in increase in leaf tissue N concentration during Belg and Meher seasons. Further significant interaction effects of compost × lime × phosphorus were found for soil available P and tissue P concentration in both seasons. Combined application of compost, lime and P at their highest rates resulted in an increase in available P by 221% in belg and 144% in meher seasons compared to the control treatment. In conclusion, separate as well as combined application of compost, lime and P in both seasons can improve the fertility of the soil in the study area.

Open Access Original Research Article

Influence of Different Herbicide Levels on Nutrient Removal by Weeds and Uptake by Potato (Solanum tuberosum L.)

Ravikumar Hoogar, R. Jayaramaiah, G. Pramod

International Journal of Plant & Soil Science, Page 1-6
DOI: 10.9734/IJPSS/2017/37764

A field experiment was conducted during kharif 2016 at College of Agriculture, Hassan, University of Agricultural Sciences, Bengaluru to evaluate different pre and post emergent herbicides on nutrient removal by weeds and uptake by Potato (Solanum tuberosum L.) the soil of experimental site is red sandy loam in texture, neutral in reaction and medium in available nitrogen and potassium, high in available phosphorus. The experiment was laid out in a RCBD with seven treatments replicated thrice. The investigation revealed that, among different herbicides, lower removal of N, P2O5 and K2O by weeds were recorded by application of Fenoxaprop–p-ethyl 54 g a.i. ha-1 as early post emergent (12.26, 4.12 and 11.47 kg ha-1) which was on par with the application of Quizalofop–p-ethyl 30 g a.i. ha-1 as early post emergent (13.58, 4.61 and 12.53 kg ha-1). Significantly higher total nutrient uptake by potato were recorded by (91.15, 30.75 and 94.70 kg N, P2O5 and K2O ha-1 at harvest, respectively) by Fenoxaprop–p-ethyl 54 g a.i. ha-1 as early post emergent, closely followed by Quizalofop–p-ethyl 30 g a.i. ha-1 as early post emergent (89.47, 29.50 and 93.12 kg N, P2O5 and K2O ha-1 at harvest, respectively).