Rice fertilization: a six-years isotope study on nitrogen and phosphorus fertilizer utilization.
mag(1970)
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crop yield,phosphorus,nutritional requirements,soil analysis,inoculation,phenology,seed,soufre,hybrids,demand,broadcasting,calcium carbonate,boron,genotypes,conservation tillage,sulphur,crop rotation,soil fertility,varieties,cost benefit analysis,zero tillage,fertilisation,isotopes,boro,carbonate de calcium,soil ph,tillage,marketing,acrisol,rock phosphate,weed control,isotope,bore,genotype,nitrogen fixation,cover crops
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