Preparation materials	Spraying materials
Preparation materials	Bucket	Sprayer	Plant leaves	Watering	Broom	Total
Bottles	+0	−2	+0	+12	+0	2
Sprayers	+0	+4	−5	−2	−1	46
Buckets	+0	−5	+10	−1	+2	23
Watering	+0	−2	−1	+54	+0	2
Total	2	46	21	3	1	73