Nitrogen Fertilizer Test

(1) Cov khoom lag luam: urea, ammonium bicarbonate, ammonium chloride, ammonium sulfate, ammonium nitrate, sodium nitrate, calcium nitrate, ammonia dej, kua ammonia, qeeb - tso nitrogen chiv, tswj - tso nitrogen chiv, ntev - ua nitrogen chiv, nitrogen chiv, nitrogen chiv, thiab lwm yam.

(2) Cov xwm txheej siv tau: kev lees paub cov khoom siv raw, kev tswj hwm kev tsim khoom, kev tshuaj xyuas cov khoom tiav, kev saib xyuas kev lag luam, kev tshuaj xyuas kev siv tshuaj, kev ntsuas kev nyab xeeb ib puag ncig, kev ntsuas kev txiav txim siab.

(1) Cov tsos mob thiab lub cev thiab tshuaj lom neeg
Qhov tshwm sim, xim, tsw, qhov loj me, cov ntsiab lus noo noo, pH nqi, ntom, solubility, dawb acids, dawb bases, hygroscopicity, caking, dej-insoluble tshuaj, stability.

(2) Cov txiaj ntsig kev noj zaub mov zoo
Tag nrho cov ntsiab lus nitrogen, ammonium nitrogen, nitrate nitrogen, amide nitrogen, muaj nitrogen, qeeb - tso nitrogen, thiab siv nitrogen zoo npaum li cas.

(3) Sub Cheebtsam thiab cov khoom txhawb nqa
Sulfur, chlorine, calcium, magnesium, sodium, phosphorus, thiab potassium cov ntsiab lus.

(4) txwv tsis pub muaj teeb meem
Cov hlau hnyav: lead, cadmium, mercury, arsenic, chromium
Cov khoom tsis zoo: Biuret, dawb ammonia, nitrate, nitrite, fluoride, cyanide, insoluble tshuaj, kab mob pathogenic.

(5) Lub cev ua haujlwm
Particle loj tis, bulk ntom, compressive zog, dispersibility, flowability, thiab cia stability.

(6) Kev ua haujlwm zoo
Nitrogen tso tawm tus nqi, qoob loo nqus tus nqi, chiv efficiency lub sij hawm, chaw nyob kam, compatibility nrog av thiab chiv.