Télécharger NPK Credits sur PC

         


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Sinon, suivez les instructions ci-dessous pour utiliser NPK Credits sur PC:

NPK Credits Sur iTunes

This app calculates the plant-available nitrogen (N), phosphorus (P2O5), potassium (K2O), and sulfur (S) nutrient credits (i.e. the fertilizer value) of manure from various livestock species that are applied to cropland fields.  Your calculated nutrient credits from this manure application are displayed at the bottom of the screen.  Your calculated nutrient credits from this manure application are displayed at the bottom of the screen.  Likewise, if the available nutrient content of the manure is entered, the equivalent total nutrient content of the manure sample will be displayed.  These credits should be subtracted from the base (unadjusted) fertilizer recommendations for a field receiving this manure.  These credits should be subtracted from the base (unadjusted) fertilizer recommendations for a field receiving this manure.  Average Nutrient Content is used when the manure has not been analyzed by a laboratory for its nutrient content.  Analyzed Nutrient Content is used when the manure has been analyzed by a laboratory for its nutrient content.  Manure nutrient content can vary greatly; manure analysis is encouraged.  Farmers can save money and protect the environment by taking credit for the fertilizer value of manure and legume crops.  • Select one of the three categories for the time from application to incorporation of the manure.  The legume-N nutrient credit available to the crop that follows in the rotation is displayed at the bottom of the screen.  • Select one of the three categories for the time from application to incorporation of the manure.  • Choose the manure application rate by tapping the [- +] buttons to raise or lower the values.  • Choose the manure application rate by tapping the [- +] buttons to raise or lower the values.  If the total nutrient content is entered, the app will covert these values to available nutrient content automatically.  • Select the manure source (livestock species and liquid or solid form).  • Select the manure source (livestock species and liquid or solid form).  The value of these credits are subtracted from the base (unadjusted) fertilizer recommendations for a field.  Tap the Reset button in the center of the screen to clear the nutrient content displays.  Legume Nitrogen Credits is used when crops follow forage legumes in rotation.  When this is the case, the typical nutrient contents (also called book values) based on lab analysis averages will be used.  • Select the amount of plant regrowth present at the time the legume crop is killed.  The app also calculates the N credit available to crops that follow forage legumes in the rotation.  • Select the forage legume crop (Alfalfa or Red Clover/Birdsfoot Trefoil).  This amount should be subtracted from the base (unadjusted) N fertilizer recommendation.  • Select the density of the legume stand at the time of termination.  • Enter the reported lab values for either total or available N, P2O5, K2O, and S from the lab report.  • Select the soil texture of the field (Medium/Fine Soils or Sand).  This reduces the money spent on purchased fertilizer applications and helps prevent over-application.  There are formulas and math involved in determining the credit values.