High Plains Calculator for Nitrogen Fertilizer Applications for Cotton
Complete the following fields:
(once finished entering values, click
Calculate
)
Enter cotton lint yield goal
(bales/ac)
Enter soil NO3-N in 0-2ft
(ppm NO3-N)
If sample is for 6 inches then enter this value, soil NO3 credit will be under-estimated by assuming NO3 levels in 6-24 in are the same as 0-6 in, 6-24 in. (NO3 is usually greater than 0-6 in. NO3)
Select soil texture
clay or clay loam or sandy clay
loam or sandy clay loam
loamy sand or sandy loam
Enter NO3-N conc of irrigation water
(ppm)
If no NO3 data for irrigation water enter "3" (typical value for High Plains water)
Enter estimated seasonal irrigation
(inches)
If dryland cotton enter "0"
Enter manure application
(t/ac)
Enter drybasis of manuret
(lb N/t)
If no data enter "40" (typical value for High Plains manure)
Enter compost application
(t/ac)
Enter drybasis of compost
(lb N/t)
If no data enter "40" (typical value for High Plains compost)
Results:
Total Nitrogen fertilizer application rate
(For Dryland, sidedress this total amount at first square)
Number of 30 lb N/ac splits for center-pivots
(Apply first 30 lb N/ac at first square, second at first bloom, third at mid bloom, fourth at peak bloom)
Daily N injections for subsurface drip
(lb N/ac)
(From June 21 to Aug 5)