Table 31C-1: Land requirement for manure N.

Note: Enter the available manure N (A) and columns (B) through (G). The values for (H), (I), and (J) will be calculated for you when you click on the "See Results" button at the bottom of the page.

A. Available Manure N (Table 31-5) = lbs N

¹ Crop N Requirements should be based upon historical soil tests and/or recommendations. If this information is not available, crop N removal rates are an alternative. For the corn example, Crop N Removal equals 170 bu./ac. * 0.9 lb N/acre or 153 lbs of N/acre.
² Nitrogen credits should include commercial fertilizer use, legume credit, or residual soil credit (if not already discounted by soil test recommendation).
³ Remaining Manure N is calculated for the first field by subtracting "Manure N Use by Field" from "Available Manure N." For all remaining fields, it is calculated by subtracting "Manure N Use by Field" from the "Manure N Remaining" results of the previous field.

Table 31C-2: Land requirement for manure P.

Note: Enter the available manure P (A) and columns (B) through (G). The values for (H), (I), and (J) will be calculated for you when you click on the "See Results" button at the bottom of the page.

A. Available Manure P (Table 31-3) = lbs P

¹ Crop N Requirements should be based upon hstorical soil tests and/or recommendations. If this information is not available, crop N removal rates are an alternative. For the corn example, Crop N Removal equals 170 bu./ac. * 0.9 lb N/acre or 153 lbs of N/acre.
² Nitrogen credits should include commercial fertilizer use, legume credit, or residual soil credit (if not already discounted by soil test recommendation).
³ Remaining Manure N is calculated for the first field by subtracting "Manure N Use by Field" from "Available Manure N." For all remaining fields, it is calculated by subtracting "Manure N Use by Field" from the "Manure N Remaining" results of the previous field.

Table 31C-3: Land requirement for anaerobic lagoon sludge P.

Note: Enter the available manure P (A) and columns (B) through (F). The values for (G), (H), and (I) will be calculated for you when you click on the "See Results" button at the bottom of the page.

A. Available Manure P (Table 31-4) = lbs P

¹Fields not receiving regular manure applications should be selected for sludge application.
²Crop P Requirements may be based upon historical soil tests and/or recommendations or crop P removal rates (select larger value). For the corn example, Crop P Removal equals 170 bu./ac. * 0.36 lb N/acre or 61 lbs of N/acre.
³ If soil P levels are near or below agronomic rates, it may be desirable to build soil P levels by applying sufficient P to supply several years of crop needs.
⁴ Remaining Manure P must be calculated for the first field by subtracting "Sludge P Use by Field" from "Available Sludge P." For all remaining fields, it is calculated by subtracting "Sludge P Use by Field" from the "Sludge P Remaining" results of the previous field.