[Parameters of microelements uptake by grain crops from sod-podzolic loamy sand and microfertilizers]

belarus chemical composition composition chimique cultivos de grano facteur de rendement factores de rendimiento fertilidad del suelo fertilisation fertilizer application field experimentation grain crops loam soils oligoelementos plant soil relations podzol podzoles podzols relaciones planta suelo relation plante sol sandy soils sodic soils soil fertility soil texture sol sableux sol sablolimoneux sol sodique suelo arenoso suelo franco textura del suelo texture du sol trace elements yield factors