SU0004350 SSNL - Laserfiche WebLink

Home Browse Search

Fact Sheet No. 4 For Dairies t The following table can be used to identify the nitrogen needs of specific crops. The nitrogen requirement values are primarily taken from the Western Fertilizer Handbook (8th Edition, 1995) that also lists other crops and nutrients in addition to nitrogen. The county Farm Advisor may be able to provide requirements for specific crop varieties z TABLE 3: NITROGEN RE UIREMENTS FOR CERTAIN CROPS CROP YIELD(tans LBS.N PER ACRE CROP YIELD tons) LBS.N PER ACRE. r Alfalfa 8 480 Oats Almonds l 6 115 1.5 200 Orchard rass Barle 2.5 160 6 300 Prunes 15 90 Bermuda rass 4 225 Safflower 2 Brame rass 5 220 Sar hurrrsudan 8 325 ' Clover- rass b 300 Su ar Beets 30 255. Corn(grain) 5 240 Tomatoes 30 l80 Com(sila e 30 250 Tirnoth 4 150 Cotton(lint) 0.75 180 Vetch 7 390 k Grain sor hum 4 250 Wheat 3 ]75 Using information obtained from`fable 3 or other sources, the nitrogen requirements for cropland at a dairy can be. calculated as shown in Table 4. TABLE 4: CROPLAND NITROGEN REQUIREMENTS Field Number Nitro en Needs lbs.N/acre)4 Field Total lbs. N per Field or Name First Cro Second Cro Third Cro Total N Acres (Field Acres x Tota]N) � 1 Total Acres `NNOlal N(lbs./year) Zl Evaluation of Nutrient Requirements: Using the total pounds of nitrogen available value from Table 2 and the total nitrogen requirement value from Table 4, an initial determination can be made as to the relationship between nitrogen availability and nitrogen need and whether or not it is necessary to export manure or to import fertilizer. As with any - farming operation, periodic measurements of nitrogen in cropland and/or crops should be made in order to better determine nutrient requirements for optimum yield. Developing the Nutrient and Irri alion Water Management Plan: A summary of the nitrogen availability grid nitrogen need values and of the decision on exporting manure or importing fertilizer is the basis for the nutrient management plan. Although nitrogen is usually the nutrient of concern at confined animal facilities because of the potential for impacts to water quality, other nutrients should also be considered, Other information that may be included in the ? nutrient management plan includes a determination of the cropland characteristics and a description of when and how the manure and wastewater will be applied to cropland. The information on when can be presented in relation to crop planting and growth. The information on how can be related to the Water Pollution Prevention Plan, Stormwater Management Plan, or other document(s)related to waste and water management. The relationship of cropland characteristics to irrigation water management should be considered when developing a - - N1WMP. The cropland characteristics that should be addressed in the NIWMP include the depth to groundwater, soil type(s), field dimensions and topography, irrigation method(s), drainage controls, and annual rainfall patterns. Y 4 Froin Table 3 or equivalent source. May be adjusted for crop yield.