Ресурсы Помеченный: Nitrogen

3 items found (Showing 1 - 3)

  1. FM 1987 ILEIA Newsletter Vol 3 #1

    19.05.1987 Integrated nutrient supply Improved fallow Nitrogen transfer from legumes Cover crops on acid soils Sunnhemp Rock phosphate Micro-nutrient drain Soil conservation and shifting cultivators Cycles of poverty
    Cover Crops Poverty Soil Conservation Fallow Sunn Hemp Legumes Phosphorus Micronutrients Soil Acidity Nitrogen

  2. Lecciones Sobre Nuestra Tierra

    01.01.1986 Esta serie de lecciones tiene como proposito explicar en la forma mas sencilla posible, la naturaleza de la tierra y las practicas que podemos usar para asegurarnos de que nuestras tierras siempre esten en la mejor condicion posible. Vamos a estudiar algunas cosas algo complicadas, como la acidez...
    Sustainable Land M... Land Use Environmental resp... Nitrogen Spanish Language

  3. Plant Nutrition Studies

    01.01.1971 It is the purpose of this booklet to suggest some ways of studying plants that may involve students more fully, especially in the design and development of elementary research suitable for school laboratories. Educational Products Division, LaMotte Chemical Products, Chestertown, MD 74 pages,...
    Plant Nutrition Nitrogen Iron Magnesium Potassium Content Phosphorus Calcium Sulfur Boron Zinc Copper Molybdenum Chlorine