السلام عليكم ,, انا مريم طالبة سنة رابعة والان خد مادة خصوبة تربة واسمدة مادة سهلة لكن الدكتور مصعبها علينا لانه ما بيشرحش اشي ,,
ممكن تساعدوني طلب منا نحل الهوم ورك ورح يزيدنا علامات ممكن ,, بصراحه ما بعرف كيف الحل ؟
TAKE HOME ASSIGNMENT
He received the following data from the laboratory at the National Center for Agricultural Research and Extension in Baqa’a:
Soil texture clay loam
Cation exchange capacity 55 cmoles/kg (=meq/100 g)
pH 7.8
Organic matter 2.5%
Available K 2.5 cmoles/kg
Available P 15 mg/kg of soil (= ppm) by the Olson method
Calcium carbonate 25%
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The laboratory made the following fertilizer recommendation:
Amount of N to be added = 100 kg/hectare
Amount of P2O5 to be added = 30 kg/hectare
Amount of K to be added = none
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The farmer went to the market and found the following fertilizers:
Ammonium sulfate 250 JD/ton
Ammonium nitrate 450 JD/ton
Diammonium phosphate 500 JD/ton
Urea 450 JD/ton
Potassium sulfate 500 JD/ton
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You are required to design a fertilizer program for this farmer that should show the following:
What fertilizer or fertilizers to add, how much of each per hectare, when, and the method of application. Explain why.
مواضيع مشابهة:
soil fertility and fertilizer
اقتباس