Tsis ntev los no, muaj ntau yam xov xwm tshiab hais txog nitrogenous chiv raw cov ntaub ntawv rau compound fertilizer.
Ua ntej, nws tau tshaj tawm tias Tuam Tshoj tau txwv tsis pub xa cov pob zeb phosphate los ntawm qee thaj chaw hauv Tebchaws Meskas vim muaj cov kab mob cadmium siab. Qhov kev txav no tuaj yeem cuam tshuam rau kev tsim cov phosphate-based compound chiv hauv Suav teb.
Qhov thib ob, tsoomfwv Indian tau tshaj tawm kev sib tw yuav 50,{1}} tonnes ntawm urea los ntawm cov neeg xa khoom thoob ntiaj teb txhawm rau ua kom tau raws li qhov xav tau hauv tsev. Qhov kev txav no los ntawm kev tsim khoom qis dua thiab xav tau ntau dua rau urea hauv lub tebchaws.
Thib peb, Pakistan tau pom zoo rau kev ntshuam ntawm 300, 000 tonnes ntawm urea kom tau raws li qhov kev thov loj hlob rau nitrogenous chiv hauv lub tebchaws. Qhov kev txav no xav kom yooj yim rau qhov tsis txaus ntawm urea hauv kev ua lag luam thiab ruaj khov ntawm cov nqi ntawm cov chiv.
Hauv cov ntsiab lus, muaj ntau yam kev txhim kho ntsig txog cov khoom siv nitrogenous chiv raw cov ntaub ntawv, uas tuaj yeem cuam tshuam rau kev tsim khoom thiab tus nqi ntawm cov chiv chiv hauv ntau lub tebchaws.
