ធនធាន ដាក់​​​ស្លាក: Micronutrients

11 items found (Showing 11 - 11)

  1. FM 1987 ILEIA Newsletter Vol 3 #1

    19 ឧសភា 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