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2. Cover crop - Wikipedia

   en.wikipedia.org/wiki/Cover_crop

   Cover crops can increase microbial activity in the soil, which has a positive effect on nitrogen availability, nitrogen uptake in target crops, and crop yields. Cover crops reduce water pollution risks and remove CO2 from the atmosphere. [1] Cover crops may be an off-season crop planted after harvesting the cash crop.

3. Green manure - Wikipedia

   en.wikipedia.org/wiki/Green_manure

   Depending on the species of cover crop grown, the amount of nitrogen released into the soil lies between 40 and 200 pounds per acre. With green manure use, the amount of nitrogen that is available to the succeeding crop is usually in the range of 40-60% of the total amount of nitrogen that is contained within the green manure crop. [5]

4. Carbon-to-nitrogen ratio - Wikipedia

   en.wikipedia.org/wiki/Carbon-to-nitrogen_ratio

   A carbon-to-nitrogen ratio (C/N ratio or C:N ratio) is a ratio of the mass of carbon to the mass of nitrogen in organic residues. It can, amongst other things, be used in analysing sediments and soil including soil organic matter and soil amendments such as compost .

5. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   The heights of the chimney can vary and as they are used to make the manhole cover to flush with the ground. [15] Grade adjustment rings can also be used on top of a cone section instead of the chimney section to adjust the frame to the required level. [20] The cover section is the top most section of sanitary manholes.

6. Biofertilizer - Wikipedia

   en.wikipedia.org/wiki/Biofertilizer

   Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane, and wheat. Blue-green algae belonging to the cyanobacteria genera Nostoc , Anabaena , Tolypothrix , and Aulosira fix atmospheric nitrogen and are used as inoculants for paddy crops grown in both upland and lowland conditions.

7. Corn smut - Wikipedia

   en.wikipedia.org/wiki/Corn_smut

   This is not the best practice, though, because corn smut can also overwinter in the soil; crop rotation is recommended. Lastly, as excess nitrogen in the soil augments infection rate, using fertilizer with low nitrogen levels, or just limiting the amount of nitrogen in the soil proves to be another way to control corn smut. [20]