WebLeaching Fraction Calculation Leaching Fraction (LF) is the proportion of applied water that leaches from a container after an irrigation event. LF (%) = leachate volume (ml) … WebNitrogen leaching fraction (NLF) Soil type Drainage type Arable land Grassland Sand Well and deep 0.89 ± 0.10 0.46 ± 0.06 Moderately 0.58 0.30 Poor and shallow 0.38 0.20 Clay 0.36 ± 0.14 0.12 ± 0.03 Peat - 0.04 ± 0.02 NLF is indication for the influence of denitrificationNLF is indication for the influence of denitrification
Leaching fraction, soil salinity, and drainage efficiency
WebA high leaching fraction (> 0.5) reduces salt accumulation in the root zone more than does a low leaching fraction (< 0.1). Table 1. Applied water, expressed as percentage of crop ET, need to attain a desired leaching fraction Leaching fraction (%) Applied water as a percentage of crop ET 5 105 10 111 15 118 20 125 25 133 30 143 35 154 WebAll data about the leaching rates and cumulative leaching fractions at 42nd day were much lower than that required by GB14569.1-2011. According to the Chinese National Standard GB14569.1-2011, the leaching rate of Co 2+ , Sr 2+ and Cs + at 42nd day should be less than 2 × 10 −3 , 1 × 10 −3 and 4 × 10 −3 cm/d, and cumulative leaching fraction … capt nicholas martiau
Assessing salinity leaching efficiency in three soils by the …
Web16 nov. 2000 · Results indicate that these halophyte species can be grown productively at a leaching fraction between 0·25 and 0·50 when salinity of the irrigation water is less than 20 g/l. At higher salinities, Salicornia bigelovii can grow and yield satisfactorily under these conditions, while the other species may require more frequent irrigation at higher … Webleaching fraction. Each treatment had seven replicates. The plots were constituted by maize cultivated in soil columns, measuring 20 cm in diameter and 100 cm in length. The … WebPoinsettias (Euphorbia pulcherrima Willd. ex. Klotzsch 'V-14 Glory') were grown in a greenhouse for 70 days in 1.3 liters of medium (13 cm deep in 15-cm pots) with a … britton wallace