Acacia nilotica ssp. indica, a multipurpose tree species occurs throughout semi-arid India. The present study reports the variation in seed germination and seedling growth of 21 sites (provenances) collected between the latitude 11 °N and 31 ° 23'N, and 19 m to 650 m altitude throughout India. There were significant differences (P < 0.05) between the sites for seed germination that varied from 16 to 90% in the incubator, and 14 to 84% in the nursery_ Significant variations were also observed in seedling growth up to 28 days in the incubator. There was no significant relationship between seed germination and seedling growth and the latitude or longitude of the original seed source. However, in general the South Indian provenances showed lower germination as compared to North Indian provenances. The observations are important for selection of vigorous provenances concerning seed germination and early seedling growth_
KEYWORDS
Hevea brasiliensis
Clones
ABSTRACTA preliminary study was conducted to assess the drought tolerance at the early stages of growth in different clones of natural rubber (Hevea brasiliensis) at the Regional Research Station of Rubber Research Institute of India at Kadalipal, Dhenkanal, Odisha in eastern region of India. Poly bag plants of five clones RRII 430, RRII 105, RRIM 600, RRII 208 and IRCA 111 were assessed for the drought tolerance and compared drought injury indices status with same clones growing naturally in the adjoining field. Results of drought injury indicated scorching, leaf yellowing, drying and leaf fall at regular intervals, since imposition of drought stress conditions. Among various tested clones RRIM 600 and RRII 430 have comparatively higher drought tolerant. Plants under field condition showed drought injury symptoms much later than the poly bag plants. Drought indices, tolerance of drought of different clones and possible reasons have been also discussed.
Need of more land for natural rubber (Hevea brasiliensis) cultivation expansion in India to non-traditional areas has entail the selection of clones suitable to warm dry climatic conditions of Odisha. The state is a nontradional rubber growing region and the rubber tree undergo severe drought in the summer months. Prolonged high temperature, low eratic rainfall and soil moisture are the major environmental limitations affecting the performance of rubber in the region. The natural rubber early growth performance of 10 ortet clones namely O 1 to O 10 and 5 modern clones RRII 105, RRII 208, RRIM 600, SCATC 93-14 and IRCA 111 were evaluated. The 10 ortet clones have been evolved from the elite tree selection among the polycross seedling populations established at the Regional Research Station of Rubber Research Institute of India in Dhenkanal, Odisha state. The 10 elite trees were cloned and such 10 cloned evolve from ortet selection have evaluated for their early growth in terms of girth and other morphological traits. Girth at 5 th year of planting of the ortet clones OR 8 and OR 4 were higher than that of the check modern clones RRII 105, RRII 208, RRIM 600, SCATC 93-14 and IRCA 111. A good annual girth increment was also recorded in OR 8 and OR 5 and comparable to modern clones. Lower first branching height at 2.4 m and less number of branches 2.1 also recorded among ortet clones as compared to modern clones as desired for better clone selection and further tree improvement aspects. The present study at immature stage suggests scope of selection of promising local ortet clones from polycross seedlings suited to the sub optimal environment.
The Agriculture sector is the mainstay role of Indian’s Economy & livelihood through the generate of employment in the agriculture sector. With the passage of time the Agriculture & Allied Sector is continuously declining because of a cause of land fragmented day by day. Due to the land fragmented but ours’ dependency on the industrial sector as well as the services sector. In the agriculture sector in 2017-18 of the workforce, 50 percent of people engagement depends on the agriculture sector. Further agriculture sector contribution 17-18 percent of the total GDP (Gross domestic product) of national income. In Haryana state agriculture contribution is about 14.5 percent to its gross domestic product (GDP) while providing employment 51 percent of the workforce engaged in agriculture. Further, about 75% of the area is irrigated, through tube Wells and an extensive system of canals. About 2/3rd of the State has assured irrigation, most suited for a rice-wheat production system, whereas rain-fed lands around 1/5th are most suited for rapeseed & mustard, pearl millet, cluster bean cultivation, agro-forestry, and arid-horticulture. Methodology Statistical Techniques and Tools: The secondary data published from Haryana statistical Abstract, Economic The survey, Ministry of Agriculture and Farmers’ Welfare, published Research papers in the journal, and agriculture reports and so on. To compute the growth behavior of trends and performance of agriculture production in Haryana farm area, yield, production and income, the exponential function will be fitted. Review of Literature, Problem increasing the productivity in Haryana. Improved agriculture Productivity
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