Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 32.
  1. Library Resource
    Document aggregated from Resource Equity Landwise Database
    janvier, 1981
    Antigua-et-Barbuda
  2. Library Resource
    Document aggregated from Resource Equity Landwise Database
    janvier, 1980
    Guyana
  3. Library Resource
    Document aggregated from Resource Equity Landwise Database
    janvier, 1980
    Chili
  4. Library Resource
    Articles et Livres
    décembre, 1980
    Colombie, Amérique centrale, Amérique du Sud

    Efforts to develop cassava technology for the vast areas of acid infertile soils were continued Large-scale germplasm screening in the field was begun in Carimagua for tolerance to low levels of P and acidity and in Quilichao, for tolerance to low levels of P. Various fertilizer trials were used to determine: (a) nutrient absorption and distribution within the plant during a 12-mo.

  5. Library Resource
    Articles et Livres
    décembre, 1980
    Colombie, Amérique centrale, Amérique du Sud

    Research of the physiology section was centered on identifying the characters associated with high root yields and quality in cassava under stress conditions. Plant reaction to water stress was studied, specifically regarding growth and yields of var. M Mex 59 and M Col 22 with a period of artificial rain exclusion. Observations were made throughout the stress period and subsequent recovery. Water stress reduced LAI notably although M Mex 59 maintained a LAI approx. twice that of M Col 22 during the stress period. LAI for both var.

  6. Library Resource
    Articles et Livres
    décembre, 1980
    Colombie, Amérique centrale, Amérique du Sud

    Research of the physiology section was centered on identifying the characters associated with high root yields and quality in cassava under stress conditions. Plant reaction to water stress was studied, specifically regarding growth and yields of var. M Mex 59 and M Col 22 with a period of artificial rain exclusion. Observations were made throughout the stress period and subsequent recovery. Water stress reduced LAI notably although M Mex 59 maintained a LAI approx. twice that of M Col 22 during the stress period. LAI for both var.

  7. Library Resource
    Articles et Livres
    décembre, 1980
    Colombie, Amérique centrale, Amérique du Sud

    Efforts to develop cassava technology for the vast areas of acid infertile soils were continued Large-scale germplasm screening in the field was begun in Carimagua for tolerance to low levels of P and acidity and in Quilichao, for tolerance to low levels of P. Various fertilizer trials were used to determine: (a) nutrient absorption and distribution within the plant during a 12-mo.

  8. Library Resource
    Articles et Livres
    décembre, 1980
    Pérou, Colombie, Argentine, Mexique, Brésil, Amérique centrale, Amérique septentrionale, Amérique du Sud

    White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.

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