No abstract

Taro (Colocasia esculenta L. Schott) commonly known as arbi, tarul, dasheen, champadhumpa and eddoe. It is an important staple food crop grown throughout many Pacific island countries, parts of Africa, Asia and the Caribbean and is thought to have originated in North Eastern India and Asia (Kuruvilla and Singh, 1981;Ivancic, 1992) An investigation was carried out to see the effect of fertilizer and spacing on the growth and yield of taro at research field of Department of Horticulture, College of Agriculture, RVSKVV, Gwalior during two consecutive kharif seasons of 2017 and 2018. Three levels of fertilizer dose viz., F 1 = full FYM (10t/ha.) + recommended dose of NPK (80:60:60 kg/ha), F 2 = full FYM (10t/ha.) +75% of recommended dose of NPK (60:45:45 kg/ha), F 3 = full FYM (10t/ha.) +125% of recommended dose of NPK (100:75:75 kg/ha) and three levels of spacing viz., 0.60m x 0.30m, 0.60m x 0.45m and 0.60m x 0.60m were used as treatment variables. The experiments were laid out in factorial randomized block design with three replications. The growth attributes of taro viz., plant height, number of leaves per plant, petiole length, number of petioles per plant, and number of side shoots per plant were significantly increased by the application of F 3 [full FYM (10 t/ha) + 125% recommended dose of NPK (100:75:75 kg/ha)]. The yield attribute and yield of taro viz., number of corms per plant, number of cormels per plant, cormel length, cormel diameter, average corm weight and yield per plant and yield per hectare were significantly increased by the application of F 3 [full FYM (10 t/ha) + 125% recommended dose of NPK (100:75:75 kg/ha)]. Plant spacing showed positive influences on the height of plant, number of leaves per plant, petiole length, number of petioles per plant, number of side shoots per plant, number of corms per plant, number of cormel per plant, cormel length, cormel diameter, average corm weight, average cormel weight, yield per plant and yield per hectare. The highest yield (7.98 t/ha and 7.92 t/ha) was obtained from the fertilizer application of F 3 , respectively in both the year 2017 and 2018. Yield per hectare was increased with the lower plant spacing up to 0.60m x 0.30m. The highest yield (9.06 t/ha 8.94 t/ha) was obtained from the spacing of 0.60m x 0.30m, respectively in both the year 2017 and 2018.

The present investigation entitled "Response of Kharif onion (Allium cepa L.) for growth and yield to different doses of Sulphur, GA 3 and NAA" was carried out during kharif 2016 -17 (first year) and 2017 -18 (second year) at the experimental field RVSKVV, Krishi Vigyan Kendra, Rajgarh (M.P.) with 27 treatment combinations of three levels of sulphur i.e. 0, 20 and 40 kgha -1 , three levels of Gibberellic acid viz., 0, 50 and 100 ppm and three levels of NAA i.e. 0, 50 and 100 ppm. Results obtained for 2016-17 and 2017-18 and in pooled basis revealed that the application of 40 kg S ha -1 was recorded significantly maximum plant height, number of leaves per plant, bulb/ green top ratio and neck diameter and yield attributes such as fresh weight of bulb, polar and equatorial diameter of bulb and bulb yield per hectare in both the year and in pooled. Foliar application of GA 3 @ 50ppm (G 1 ) and NAA @ 100 PPM (N 2 ) at seedling stage and after 30 days after transplanting also exhibited significantly maximum growth and yield. It was concluded that various growth and yield parameters were improved with the application of S 40 Kg/ha+ GA 3 50 ppm + NAA100ppm for higher yield and quality of Kharif Onion.

Thirty five genotypes of coriander (Coriandrum sativum L.) were tested in four artificially created environments to judge their stability in performance of seed yield. The differences among genotypes and environments were significant for seed yield. Stability parameters varied considerably among the tested genotypes in all the methods used. The variation in result in different methods was due to non-fulfillment of assumption of different models. However, AMMI analysis provides the information on main effects as well as interaction effects and depiction of PCA score gives better understanding of the pattern of genotype – environment interaction. The sum of squares due to PCAs was also used for the computation of AMMI stability values for better understanding of the adaptability behavior of genotypes hence, additive main effects and multiplicative interaction (AMMI) model was most appropriate for the analysis of G x E interactions for seed yield in coriander. Genotypes RVC 15, RVC 19, RVC 22, RVC 25 and Panipat local showed wider adaptability while, Simpo S 33 exhibited specific adaptability to favourable conditions of high fertility. These genotypes could be utilized in breeding programmers to transfer the adaptability genes into high yielding genetic back ground of coriander.

Selection indices based on their genetic merit of fruit characters were constructed for fruit yield/tree in 48 genotypes in mango (Mangifera indica L.). Genotypes, SBM 01-35, SBM 01-26, SBM 01-9, SBM 01-10 and SBM 01-26 in on year while, SBM 01-12, SBM 01-36, SBM 01-26, SBM 01-28 and SBM 01-9 in off year recorded highest fruit yield /tree. Genotypes SBM 01-10, SBM 01-36, SBM 01-09, SBM 01-30 and SBM 01-6 exhibited comparatively high estimates of selection indices during on year while, SBM 01-36 followed by SBM 01-12, Totapari, SBM 01-17 and SBM 01-29 showed the maximum estimates of selection index for fruit yield/ tree during off year. Alphonso followed by SBM 01-5, SBM 01-13, Langra and SBM 01-14 during on year and Dashehari, Safeda, SBM 01-3 and SBM 01-39 in off year exhibited the minimum estimates of varietal indices. Genotypes differed considerably in their ranking pattern based on selection indices. Genotypes SBM 01-9, SBM 01-10, SBM 01-30, SBM 01-6 and SBM 01-36 showed maximum varietal indices and phenotypic performance in both the years thus, appeared promising for use as parent in mango improvement programme.