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Monday, July 27, 2020 | History

2 edition of Biological and socio-economic constraints to high yield of wheat crop in Sind found in the catalog.

Biological and socio-economic constraints to high yield of wheat crop in Sind

Sharif Ahmed Siddiqi

Biological and socio-economic constraints to high yield of wheat crop in Sind

by Sharif Ahmed Siddiqi

  • 111 Want to read
  • 37 Currently reading

Published by Sind Agriculture University in Tandojam .
Written in English

    Places:
  • Pakistan,
  • Sindh.
    • Subjects:
    • Wheat -- Pakistan -- Sindh.,
    • Wheat -- Yields -- Pakistan -- Sindh.

    • Edition Notes

      Statementby Sharif Ahmed Siddique.
      ContributionsPakistan Agricultural Research Council. Social Science Division.
      Classifications
      LC ClassificationsSB191.W5 S56 1984
      The Physical Object
      Pagination68 leaves, [3] leaves of plates :
      Number of Pages68
      ID Numbers
      Open LibraryOL2701484M
      LC Control Number85930701

        Globally, we find that closing yield gaps to % of attainable yields could increase worldwide crop production by 45% to 70% for most major crops (with 64%, 71% and 47% increases for maize, wheat Cited by: Plant Sciences Research Programme project R ‘Promotion of rainfed rabi cropping in rice can be effective in producing a yield from crops grown on residual moisture in the absence the precise physical, biological and socio-economic constraints on rabi cropping in a number of representative rice fallow areas in the Indian states of.

      shed light on this important aspect. The overall yield gaps of organic for all crops are estimated to be 25% (Seufert et al., ) based on comparisons and at 20% based on comparisons (De Ponti et al., ). Nitrogen availability was identified as a major yield-limiting factor in organic systems (Seufert et al., ). Shortage of irrigation facilities causes a serious limitation in the expansion of crop area in Pakistan. The lower water supplies, loses from water course in the fields are the serious problems of farm sector. Actual surface water availability is million acre feet. 10) Inadequate Agricultural Research. The average crop yield in Pakistan is.

      Depending on the level of technology, soil conditions and socio-economic factors, the range of yields is wide (between and 5 tonnes/ha) but generally higher than in the strictly upland ecosystem (Table 4). Constraints. As a result of poor drainage, high levels of Fe 2+ and Mn 2+ may occur and often produce iron toxicity symptoms. Iron. 1. Introduction. Rice and wheat are the world’s two most important cereal crops, contributing 45% of the digestible energy and 30% of total protein in the human diet, as well as a substantial contribution to feeding livestock (Evans, ).These crops and their production systems have evolved, along with their photothermal requirements for growth and development, with distinct Cited by:


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Biological and socio-economic constraints to high yield of wheat crop in Sind by Sharif Ahmed Siddiqi Download PDF EPUB FB2

Rice is the most important crop in all areas as both food and cash crop. However, rice yield is as low as 1 tha Low yields are attributed to diseases and pests, poor inputs, insufficient water. This significant increase in wheat yield is mainly due to the introduction of high yielding cultivars and improvements in integrated disease management practices which are dealt with in the following chapters, followed by individual descriptions of some important wheat diseases that cause substantial yield losses in different wheat growing Author: Yeshwant Ramchandra Mehta.

The crop biological yield refers to the total dry matter accumulation of a plant system. Improved harvest index of the represents increased physiological capacity to mobilize photosynthates and translocate them into organs having economic yield.

The technological and socio-economic constraints have accounted for 54 percent and 46 percent of the yield gap, respectively, in the system.

Soil-related constraints rank first, followed by. High genetic correlations were observed among sites for days to anthesis, days to maturity, plant height, and for grain yield at most of the pairwise sites (Table 1). Broad sense heritability for plant height, days to anthesis, and maturity in all the environments, was relatively higher than that of grain yield, except in Celaya (data not presented).Cited by:   Yield variation of wheat and barley in Britain in relation to crop growth and soil conditions—A review.

Journal of the Science of Food and Agriculture, Vol. 34, Issue. 10, p. Journal of the Science of Food and Agriculture, Vol.

34, Issue. 10, p. Cited by:   Global wheat production is currently close to million tons 1, and the demand for wheat in developing countries is projected to increase 60% by grain yield is a complex trait that.

Crop tolerance to waterlogging depends on factors such as species sensitivity and the stage of development that waterlogging occurs. The aim of this study was to identify the critical period for waterlogging on grain yield and its components, when applied during different stages of crop development in wheat and barley.

Two experiments were carried out (E1: early Cited by: Growth and yield attributes of wheat at different seed rates. Sarhad J. Agric. 27(2): INTRODUCTION Optimum seeding rate is considered an important management factor for improving yield of wheat.

It is of particular importance in wheat production because it is under the farmer's control in most cropping systems (Slafer and Satorre. Problem statement: The crop in the irrigated scheme has faced by manifold problems contributed to low level of productivity and high cost of production of wheat.

The crop. The _____ refers broadly to two agricultural trends of the twentieth century: the introduction of high-yield crop varietals in developing countries and improvements in agricultural technologies such as irrigation systems, fertilizers, and pesticides. green revolution. Constraints related to inherent properties of orphan crops.

Orphan crops fit to the socio-economic and diet of the population in the developing world. However, orphan crops are not without constraints.

Some orphan crops are associated with undesirable traits, which need to be altered to improve their productivity and/or nutritional by: 3. contribution of wheat crop in national GDP, its production is declining each year (Khan, ).

The yield of wheat crop is 32 percent of its potential, ranking the country on 59th position across the globe in terms of average yield per unit of land (Zulfiqar and Hussain, ). The SDPI () documented that, 61 percent of.

Effect of Soil Biological Properties on Crop Production Serratia and Arthrobacter) can also increase plant resistance to pests and diseases through. Interaction between socio-economic constraints and management intensity.

Socio-economic factors play an important role in determining crop yield by affecting crop management practices vis-à-vis input intensity. Present study identified significant associations between maize yield and ethnic origin (p = ), ownership of land (p = Cited by: 9.

socioeconomic constraints which limit the productivity of the dairy farms in Sindh which are shortage of feed, high mortality, poor genetic potential, high input cost. yield gaps are high and poor soils, amongst other constraints add to the difficulties for sustainable farming and incomes.

Cereals like Sorghum, Millets, Wheat, Maize and Rice are major staple foods of the most population. These cereals are grown over an area of m ha producing m tons (Table1).File Size: 1MB. Jai Prakash Singh (45), a farmer from Varanasi, has developed a number of high yielding varieties of wheat (Triticum aestivum L.), paddy (Oryza sativa L.), pigeon pea (Cajanus cajan (L.) Mill.), and mustard (Brassica juncea L.) following simple selection method.

His village Tandiya is 30 km away from Varanasi, Uttar Pradesh. It is a small village with about 60 households. The potato’s biological characteristics Many constraints derive from the biological characteristics of the potato itself. These include the low multiplication rates of seed tubers, and the technical difficulties and costs associated with maintaining seed quality through successive multiplications, owing to the potato’s susceptibility to soilFile Size: 2MB.

Wheat yields have steadily increased over the past 50 years, averaging approximately % per year. Demands for faster progress will be made by an ever-growing world population.

The challenge for the Cited by: 4. Average wheat yields in the high-rainfall zone (HRZ) of southern Australia are predicted to be around 10 t ha–1, yet most regions fall short through a lack of locally adapted cultivars or abiotic stress that constrains yield.

Wheat yields in Tasmania can be variable but have exceeded this potential yield in some field trials and have thus approached that of other traditionally high Cited by:   The growing concern about the sustainability of tropical agricultural systems stands in striking contrast to a world-wide decline in the use of soil-improving legumes.

It is timely to assess the future role that soil-improving legumes may play in agricultural systems. This paper reviews recent progress, potential, and limitations of green manure technology, using lowland Cited by: The rice yield in the country is much lower than the potential yield under farm circumstances.

The yield gap is due to several biological and socio-economic constraints in the adoption of technology. The production is beset by a number of problems. The major causes are the limited quantity of quality seed.