This may be a reflection of the effect of SL on length and shape of the carrots. RH III gave the lowest projected total waste, because it reduced waste produced during the grading step. Our overall conclusion is that RH III performed the best in terms of root yield and quality for baby style carrots. PD affected total carrot yield but no other quality parameters, and SL influenced root quality in terms of shape and length. Additional work is suggested to determine the effect of other RH categories.
Earthworms also aerate the soil, improving drainage, which can contribute to higher crop yields.
So, if growers would like to increase their earthworm population, a few steps should be followed. Tillage tends to reduce earthworm populations by speeding soil drying and freezing, disrupting earthworm burrows, and burying the plant material they use as food. The key to increasing earthworm populations is to reduce or eliminate tillage. Use chisel plowing or light-surface cultivators if you must plow. Deep and frequent tilling can decimate earthworm populations, reducing their numbers by as much as 90 percent.