No Thumbnail Available

Three overviews on environment and aquaculture in the tropics and sub-tropics









Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Book (stand-alone)
    Soil management: compost production and use in tropical and subtropical environments
    FAO Soils Bulletin No. 56
    1987
    Also available in:
    No results found.

    The objective of this Soils Bulletin is to promote the use of locally available organic materials to increase soil organic matter content for improvement of soil fertility, and as a sources of plant nutrients in conjunction with mineral fertilizers. This manual is written for all those concerned with the maintenance and improvement of soil fertility, especially under tropical and subtropical conditions. It contains material for use in farmer training. The severe drought and famine in parts of Africa in 1985 have shown the necessity for adequate soil organic matter to prevent hillside erosion and to retain moisture in the soil for crop growth. The cost of mineral fertilizers and their relative scarcity in some areas has increased the need to recycle waste organic materials as sources of crop nutrients. This Bulletin explains the basic composting process, suitable organic wastes, practical composting methods, use of the product in a variety of situations and a consideration of econo mic and social benefits. It also deals with approaches to practical extension work with farmers on the subject.
  • No Thumbnail Available
    Book (series)
    Techno-economic performance of marine capture fisheries 2001
    Also available in:

    The Fisheries Technical Paper summarises the findings of 15 country level studies on the economic and financial performance of marine capture fisheries conducted in 1999 and 2000. The studies validate the findings of surveys carried out between 1995 and 1997 and published in FAO Fisheries Technical Paper No. 377. Most types of vessels i.e. 92 out of the 108 types of vessels covered by the study or 85 percent showed a net profit after deducting the cost of depreciation and interest. These overall positive results were also achieved because of higher prices paid to producers as compared to the previous study period. There were only few indications that fishing effort had been reduced and fish stocks had recovered. It was also observed that some fishing fleets had adapted themselves to new conditions dictated by depleted and changing abundance of resources and new access to markets in the context of globalisation by changing their fishing operations. Those vessels, which had previously sh own positive results but now incurred losses, were generally older vessels due to the fact that they continued to working on overexploited stocks. Regarding the impact of cost reducing and revenue enhancing Government financial transfers it was found that many fishing vessels, which still received subsidies would also have been profitable without them. In the case of most countries it was observed that no detailed empirical information was available on the amount of Government financial transfer s to the fishing industry nor on the financial performance of individual fishing enterprises.
  • No Thumbnail Available
    Project
    Rice-cum-fish trials in Luapula Province, Zambia 1994
    Also available in:
    No results found.

    Seven farmers took part in rice-cum-fish trials in Luapula Province during the rainy season 1992–93. The rice variety Supa was grown for 6 1/2 to 7 1/2 months, and two fish species, Tilapia rendalli and Oreochromis macrochir, were stocked at 50 fingerlings per 100 m2 and grown for 4 1/2 months. The rice harvest from the rice-cum-fish field was on average 11% higher than that from the rice-only field. The average fish yield was at the same level as that recorded during rice-cum-fish farming trial s in Philippines and Madagascar. But the net return to land and labour was lower for rice-cum-fish farming than for rice-only farming. Hence the economic viability of rice-cum-fish farming was not proved. The main reason for the negative results appears to be the amount of labour expended on fish production, particularly feeding. However, the seven farmers who took part in the trials intend continuing with rice-cum-fish farming, as they believe it has potential.

Users also downloaded

Showing related downloaded files

No results found.