If you had a good garden last year and a lot of organic matter in the soil and a lot of plant debris decomposing in the garden through the fall, this is probably the case.
(you; had; a good garden; T:last year) (a lot of plant debris; decomposing; L:in the garden; T:through the fall) (this; is probably; the case)
you a lot of plant debris this
had decomposing is probably
a good garden T:last year
L:in the garden T:through the fall
the case