I - --ii

(3889, IC-26, Cp-5b and Cp-37a) were used for both experiments. The crop in
nitrogen fertilizer study received 60 kg P205/ha as a uniform dose. An ascochyta
blight tolerant cultivar ILC 482 was used as a test crop.
Several harvests were made to assess the nodulation and growth but only the
data for early flowering stage are presented (Table 3> The data for the inoculated
treatments represent a mean for the four strains of Rhizobium used.
The uninoculated plants produced a few nodules and their numbers were little
affected by either the application of phosphate or nitrogen fertilizers. The nodule
weight increased with the addition of fertilizers up to 50 kg P20/ha and 40 kg
N/ha. Beyond those amounts the nodule weights decreased.
Table 3
Development of nodulation and growth in winter-planted chickpea (ILC 482)
under different phosphate and nitrogen regimes at Tel Hadya, 1980-81.
Treatment Rate Nodule Nodule dry wt. Total dry wt.
(kg/ha) No./plant (mg/plant) (g/plant)
Uni.joc Inoc. Uninoc Inoc. Uninoc lnoc.
P2 0 5
0
25
3.1
4.0
13.3
18.8
262
275
601
615
4.53
4.59
5.94
6.58
50 3.4 16.2 381 619 4.36 6.89
N
75
0
20
40
60
4.5
3.1
4.4
3.9
2.9
14.1
19.9
17.1
13.6
14.8
325
77
208
207
285
694
492
411
407
314
5.80
3.81
5.02
6.54
7.88
7.29
6.57
6.29
6.72
6.80
Inoculation with the different strains of Rhizobium considerably improved
nodulation. Again the nodule numbers were less affected by additions of both
phosphate and nitrogen fertilizers. Increasing the rates of phosphate fertilizer
increased the nodule mass development. However, he reverse was true when the
amount of nitrogen fertilizer was increased.
Addition of phosphate fertilizers up to 50 kg P20/ha to the uninoculated
plants had little effect on the plant drymatter production. Only addition of 75 kg
P20/ha increased the dry matter production for the uninoculated plants. However,
the inoculated plants responded steadily with the increase in phosphorus
application rates, producing maximum dry matter at 75 kg P20/ha.
Drymatter production for the uninoculated plants increased -.+en rates of
application of nitrogen fertilizer were increased. Maximum drymatter was producted
when 60 kg N/ha was applied. Nitrogen fertilizer application had, however,
little effect on the drymatter production for the inoculated plants.
163