论文部分内容阅读
(一)由每100克土中所含养分的毫克数,换算 ppm:原数乘以10即可。例:6mg/100g 土(每百克土中含6毫克)是多少 ppm? 计算:6×10=60(ppm) (二)对0-20厘米土层中有效养分含量的计算: 1、由 mg/100g 土折算每市亩含多少斤:原毫克数乘以3即可。例:一土样(0-20匣米土层)的有效氮含
(A) by the milligrams of nutrients contained in each 100 grams of soil, conversion ppm: the original multiplied by 10 can. Example: How many ppm 6 mg / 100 g soil (6 mg per 100 g soil)? Calculation: 6 × 10 = 60 (ppm) (b) Calculation of effective nutrient content in 0-20 cm soil layer: mg / 100g soil conversion Mu Mu containing how many pounds: The original number of milligrams can be multiplied by 3. Example: a soil sample (0-20 box soil layer) effective nitrogen content