Δ15N Values of Sorghum Grains Harvested on a Vertisol in the Semi-Arid Tropics Were Positively Related to Doses of Fertilizer N but Negatively With the Frequency of Legume Cultivation
Soil Science and Plant Nutrition - United Kingdom
doi 10.1080/00380768.2001.10408406
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Date
June 1, 2001
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Informa UK Limited