Items needed for synthesis of plant food in green leaves are _________ & the process through which it takes place is called photosynthesis: A. Sunlight B. Chlorophyll C. Water & plant nutrientsD. All of the above
The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:_________? A. PotashB. Nitrogen C.…
From the sources of plant nutrients availability in soil, which of the following statements are correct: A. The plant absorbs carbon as carbondioxides directly from the atmosphere. B. Water is the source of hydrogen C. Air & water is the…
Ammonium sulfate fertilizer containing 21% N & 24% S, is best in top dressing in:_________? A. BarleyB. Rice C. Date palm D. None of these
Immobile nutrient in soil is:_________? A. P B. N C. Mg D. None of the above
Irregular rock masses formed in the pre-existing cracks & crevices are:__________? A. Sills B. Dikes C. Lacoliths D. Batholiths
What happens when an saline-alkaline soil is reached with water: A. pH decrease, Ec increase B. pH & Ec both increaseC. pH increase & Ec decrease D. None of these
Azotobacter fixes atmospheric nitrogen in the soil by:__________? A. SymbioticallyB. Non-symbiotically C. Can fix A & B D. None of these
Maximum fixation of K occurs:__________? A. 1:1 clay mineral B. 1:2 clay mineralC. 2:1 clay mineral D. 2:2 clay mineral
Conversion of inorganic P to organic P is known as:_________? A. MineralizationB. Immobilization C. Solubilization D. both A & C