354
R. Almon et al.
Two other irrigation methods - surface and subsurface dripping - were tested
for their potential to disseminate Giardia cysts and Cryplosporidium oocysts in
soil matrix (Tables 6, 7 and 8).
Table 6. Cryptosporidium oocysts and Giardia cysts enumeration in soil samples in Arad
(October, 1998)
Soil sample
Soil moisture
Giardia
Cryptosporidium
(cm depth)
% by weight
(cysts g-l)
(oocysts g-l)
Arad vineyard
Drip surface effluent
20.4
0
0
(0 cm)
Drip surface effluent
21.8
0
47
(30 cm)
Drip surface effluent
20.6
43
0
(60 cm)
Drip subsurface effluent
8.5
39
118
(0 cm)
Drip subsurface effluent
16.1
ND*
0
(30 cm)
Drip subsurface effluent
27.4
52
52
(60 cm)
ND* - Not Determined
Table 7_ Cryptosporidium oocysts and Giardia cysts enumeration in soil samples (March,
1999)
Soil Sample
Soil moisture
Giardia
Cryptosporidium
(cm depth}
% b~ wei~ht
{c~sts ~-l)
{ooc~sts ~-l)
Arad almonds
Drip surface effluent
15.6
0
0
(0 cm)
Drip surface effluent
16.6
37
73
(30 cm)
Drip surface effluent
16.8
0
0
(60 cm)
Drip surface effluent
17.6
0
37
(90 cm)
Drip subsurface effluent
12.8
0
0
(0 cm)
Drip subsurface effluent
18.8
0
0
(30 cm)
Drip subsurface effluent
18.5
0
0
{60 cm}