Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 15.
  1. Library Resource
    Documents et rapports de conférence
    décembre, 1999

    In a fallow-cultivation model with biomass regeneration, we find the population-poverty-degradation linkage via the discount rate: slight increases in the discount rate result in increased cropping frequency and much lower soil fertility. Aggregating gives transitions equation declining in fertility and increasing in the fallow:cultivation ratio.

  2. Library Resource
    Documents et rapports de conférence
    décembre, 1999

    The total expected cost of sequestering carbon in agricultural soils is estimated under a possible EQIP program offering a per-acre subsidy to adopt conservation tillage and a carbon credit program where producers can sell their carbon credit in an external market. Both programs are compared to the minimum cost solution.

  3. Library Resource
    Documents et rapports de conférence
    décembre, 1999

    Controlling Russian knapweed with an integrated system of herbicide followed by seeding perennial grass is profitable in yielding an 8.7% average rate of return, and repaying the establishment costs in approximately six years. Moreover, the system is sustainable by exploiting plant competition and eliminating herbicide usage in later years.

  4. Library Resource
    Documents et rapports de conférence
    décembre, 1999
    Chine

    Farmers' ability to leave agriculture is an important and debated topic in China and other countries. Many scholars believe China's unique land tenure policies prevent farmers from leaving agriculture. This paper examines the hypothesis that China's land tenure system deters exit from agriculture using household level data from Northeast China.

  5. Library Resource
    Documents et rapports de conférence
    décembre, 1999

    This paper evaluates the impact of the El Nino/Southern Oscillation (ENSO) on U.S. farmland values. Fourier series analysis decomposes climatological variation into ENSO and non-ENSO components. Farmland values, regressed against ENSO variation and other variables, are negatively affected by ENSO related weather variability in about 90% of U.S. climatological regions.

  6. Library Resource
    Documents et rapports de conférence
    décembre, 1999
    Népal

    A fully interactive two group model is used to examine the issue of resource allocation under alternative tenancy systems in Nepal. The results support the Marshallian hypothesis that both mixed and pure share tenants apply variable inputs less intensively in their rented-in plots than in owner operated plots.
    Keywords: Share tenancy, efficiency, input output intensities

  7. Library Resource
    Documents et rapports de conférence
    décembre, 1999

    A theoretical model identified ranges of spatial variability required within multiple-land-class fields for economically viable variable rate technology (VRT) and the spatial variability required for maximum return to VRT. An example illustrated that return to VRT and the viable range of spatial variability increased for higher corn and nitrogen prices.

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