Certified Crop Advisor Western Region Exam. 388 Questions With 100% Correct Answers 2024.

Define saline soil {Ans: a soil containing enough soluble salts to interfere with plant growth, but not containing an excess of exchangeable sodium}What is the formula for SAR {Ans: SAR= Na/Square root of Ca+Mg/2 (%)}Max allowable depletion {Ans: amount of water irrigator is willing to be used from AWC. before the yield reducing threshold. ranges from 30-50%}common lab test for most soil micronutrients? {Ans: DTPA}capacitance sensor {Ans: measures changes in dielectric constant of soil (i.e. sends electrical signal into soil and measures its attenuation by soil water. need to now volumetric water content at field capacity and permanent wilting point}general fertility soil sampling depth {Ans: 0-12 inches}sulfur soil test low, medium, and high {Ans: low less than 10 ppm, medium 10-15ppm, high greater than 15ppm}at what meq/liter does bicarbonate have severe affect on clogging {Ans: greater than 4.0}how do plants absorb P {Ans: diffusion}how to limit negative environmental impacts of P {Ans: mass balance. Soil P test. soils high in P cant sequester P and potential for loss increases}Potassium Nitrate (KNO3) {Ans: 13-0-45}mobility of calcium in soil and plant {Ans: low and low}how do soil organisms and soul