Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 270.
  1. Library Resource
    Articles et Livres
    décembre, 2004

    Study was conducted to determine turnover of water, nitrogen and energy in lactating Holstein x Boran cows. Nine cows (Bos indicus × B. taurus) between their 42nd and 420th the days of lactation were selected for this study. The crossbred cows had ad libitum access to water and a dried maize stover/lablab mixture (3:1), and received 3.2 kg of concentrate (wheat bran, molasses, bone meal) and 3 kg of fresh Napier grass per day.

  2. Library Resource
    Articles et Livres
    décembre, 2004
    Colombie, Amérique du Sud

    It is widely believed that tropical soils (mainly Oxisols) have excellent physical characteristics such as high infiltration rates, high permeability of water, good and stable soil structure and that consequently, they can support mechanized agriculture. However in the Eastern Plains (Llanos Orientales) of Colombia, when Oxisols are subjected to tillage using disc harrow, soil physical conditions deteriorate rapidly.

  3. Library Resource
    Articles et Livres
    décembre, 2004
    Colombie, Équateur, Amérique du Sud

    A survey for parasitoids of the whiteflies, Bemisia tuberculata Bondar, Trialeurodes variabilis Quantaince, T. vaporariorum (Westwood), Aleurotrachelus socialis Bondar, Tetraleurodes sp., Aleuroglandulus malangae Russell and Aleurodicus sp., was conducted in 6 cassava growing regions of Colombia and Ecuador. In Colombia, the degree of infestation was predominantly high (>29 whiteflies/cm 2 ) for A. socialis , B. tuberculata and T. variabilis in all cassava growing regions. In Ecuador, levels of infestations were high for Aleurodicus sp., A. socialis , B. tuberculata , Tetraleurodes sp.

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