International Certified Crop Adviser Study Guide Exam

International Certified Crop Adviser Study Guide Exam Soil Minerals - CORRECT ANSWER-Clays, carbonates, hydroxides Mineralization - CORRECT ANSWER-Organic material decomposed into nutrients in a inorganic from Immobilization - CORRECT ANSWER-nutrients converted into biomass become 'tiedup' and are unavailable for nutrient cycling Uptake antagonism between ions - CORRECT ANSWER-Two or more ions may compete for plant uptake by various mechanisms. One ion is said to be antagonistic with regard to the uptake of another ion mass flow - CORRECT ANSWER-movement of nutrients with the flow of water to plant roots: Nitrogen, Calcium, Magnesium Diffusion - CORRECT ANSWER-Movement of molecules from an area of higher concentration to an area of lower concentration. P and K root interception - CORRECT ANSWER-acquisition of nutrients by a root as a result of the root growing into the vicinity of the nutrient source Nitrogen soil mobility - CORRECT ANSWER-Mobile as Nitrate (NO3). Immobile as ammonium (NH4) Phosphate soil mobility - CORRECT ANSWER-immobile in soil except where P absorption capacity has been met (CEC) Sulfate Soil mobility - CORRECT ANSWER-Mobile in most soils Ca, K, Mg soil mobility - CORRECT ANSWER-Immobile in most soils held by CEC. Ions mobile in soil solution Nutrient holding capacity in regards to texture - CORRECT ANSWER-More clays have more room for nutrient storage. increased sand content have increased leaching ability Soil structure in regards to nutrient holding - CORRECT ANSWER-Arrangement of soil particles into aggregates. large pores will increase leaching. lack of structure leads to runoff, leaching, erosion