According to WAPDA, the ECe of the salt free soil should remain__________________?
A. < 4 dsm-1
B. Equal to 4 dsm-1
C. 4-8 dsm-1
D. None of the above
Soil Science
The exact chemical formula of DAP fertilizer is___________________?
The exact chemical formula of DAP fertilizer is___________________?
A. (NH2) HPO4
B. NH4H2PO4
C. NH4H2PO4
D. Both a & c
Nitrification is the microbial conversion of____________________?
Nitrification is the microbial conversion of____________________?
A. NH nitrogen the NO3 nitrogen in soil
B. NO2 to NO3 nitrogen in soil
C. NO3 nitrogen to NH4 + in soil
D. None of the above
Radiation can be detected by the blankening of photographic film or by using___________________?
Radiation can be detected by the blankening of photographic film or by using___________________?
A. Ratio autoanalyser
B. GM counter
C. Neutron probe
D. Dosimeter
The complex fertilizer Nitrophos available in the market contains_____________________?
The complex fertilizer Nitrophos available in the market contains_____________________?
A. 25%N & 23% P2O3
B. 46%N & 23% P2O3
C. 23%N & 23% P2O3
D. None of the above
Extraction of humic substance can be done by______________________?
Extraction of humic substance can be done by______________________?
A. NaOH
B. NH4Cl
C. NH4OH
D. None of the above
Who gave the defination of humic acid ?
Who gave the defination of humic acid ?
A. Gapon
B. Felbeek
C. Neir
D. Liekig
Which compound decay slowly______________________?
Which compound decay slowly______________________?
A. Amino acid
B. Lignin
C. fats
D. Cellulose
Widely spread saprophytic fungi is________________________?
Widely spread saprophytic fungi is________________________?
A. Basidiomycetes
B. Ascomycetes
C. Endospore
D. None of the above
Which bacteria causes fermentation__________________?
Which bacteria causes fermentation__________________?
A. Azotobacter
B. Bacillus
C. Pseudomonas
D. Corey