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tion for moisture in the spring-planted crop prevents the realization of yield advantage with increased plant population as is obtained in the winter-planted crop. In order to identify optimum level of plant population for different rainfall situation, a plant population study was carried out with winter-planted crop of 2400 2000 1600 1200 800 _+ 16.6 1200 0-----o Tel Hadya, Winter crop 25 Plants /n o-- Jinderis, Winter crop -- Jinderis, Spring crop 131 +-. Kafr Antoon, Winter crop Figure 4 Effect of plant population on the seed yield of chickpeas at Tel Hadya (seasonal rainfall 427.8 mm; potential seasonal evaporation 620 mm), Jinderis (seasonal rainfall around 400 mm, potential evaporation 536 mm), and Kafr Antoon (seasonal rainfall 303 mm, Eo = 640 mm), during 1979-80 cropping season. 33.3 50
132 ILC 1929 at Tel Hadya and ILC 482 at Kafrantoon and Jinderis subsitcs of ICARDA during the 1979-80 cropping season. At Jinderis, which represents typical chickpea- growing area in northern Syria, a spring planting variable was also introduced in the study. The total seasonal rainfall and potential evapotranspiration at these three locations as well as the grain yield response to various levels of plant population are given in Fig. 4. It is evident that the yield of winterplanted chickpea increased conspicuously at all locations when plant population was raised from 16.6 plants/m2 to up to 33.3 plants/m2. Increasing the population beyond this level resulted in significant reduction in the yield at Jinderis, whereas at Tel Hadya the yield showed an increasing trend up to 50 plants/m2. Even the spring crop at Jinderis responded positively to increased population up to 33.3 plants/m2; the magnitude of increase was, however, not as high as in the case of winter-planted crop. From these data, it is evident that a population level of about 33.3 plants/m2 appears to be optimum for a situation having a seasonal precipitation around 400 mm. In order to test the interaction between plant population responsc and moisture supply in greater detail, these studies are being carried out again at four ICARDA subsites during the 1980-8 1 cropping season. The data collected on the percent interception of the photosyntheti,:ally active radiation (PAR) by the canopy of ILC 482 chickpea at Tel Hadya at the advanced podding stage as affected by plant population and planting season are shown in Fig. 5. The seasonal precipitation has been a;ound 350 am. Under this condition, the increase in plant population from 16.6 to 50 plants/m2 has shown almost a linear increase in PAR interception in winter- planted crop as against an asymptotic trend beyond 25 plants/m2 in case of spring- planted crop. The latter might be attributed to increased inter-plant competition for limited available moisture supply at levels higher than 25 plants/m2. The differences in the interception of PAR by the winter- and spring-planted crop should reflect in the overall phytomass and economic yield. Response to Nutrient Application Since the yield levels of a winter-planted crop are much higher than those of the spring- planted crop, it is logical to expect that the mineral nutrient requirement of the former would also be considerably higher than that of the latter. Whereas on a soil of high native fertility this additional requirement of the nutrient may easily be met, on the soils with poor fertility status the limitation of the mineral nutrients might prove a significant constraint to the realization of the yield potential of a winter- planted crop. An important dimension to the mineral nutrition of the crop is the fact that the crop is capable of meeting a major part of its nitrogen requirement by symbiotic
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A14 ""..."W~e S~wn ofCh all il NM I
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WORLD CROPS: PRODUCTION, UTILIZATIO
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Copyright (c) 1984 by ICARDA All ri
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VI THIRD SESSION: WINTER SOWING Agr
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Foreword The advancing of sowing da
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Editors' Note The idea to hold this
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Chairman, Ladies and Gentlemen, Ope
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4 including stunt virus (pea leaf r
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6 in with Iarmers'plans and proposa
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8 about 130 to over 200 days, where
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10 Table I Mean yield and range of
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12 International Yield Trials A 10-
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14 small plots on farmers' fields i
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16 HANOUNIK, S.B. 1979. Diseases of
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18 diospores (Khune and Kapoor 1980
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20 2. Reproduction Asexual. The ase
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22 surface. However, the fungus los
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24 observed small reddish brown spo
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26 Reddy and Nene (1979) developed
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28 suggested the application of pot
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30 ASKEROV, I.B. 1968. Ascochytosis
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32 NEMLIENKO, F.E. and LUKASHEVICH,
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Proceedings ofthe Workshop on Ascoc
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100/ ILC 1929 90 -80./ 8o0 / ILC
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30 24 18 12 6 Temperature (°C) t6
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I I -I - --ii ' Disase Ic I ii I'll
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infected seed is a much more potent
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Proceedingsof the Workshop on Ascoc
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early February were found to give e
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pot assembly consists of a stem tha
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Table I A quantitative 9-point rati
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inoculating the plants by uniformly
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Proceedings ofthe Workshopon Ascoch
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Table I Cultural characteristics of
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Line/ Table 2 Disease grades produc
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India and Iran were highly sporulat
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LUTHRA, J.C. and BEDI K.S. 1932. So
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J.S. Grewal There are more chances
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68 Table I Summary of results of sc
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70 Table 3 Summary of results of sc
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72 ery originated from the USSR, Sp
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Table 7. Contd. Rating on 1-9 Scale
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Table 8 Contd. Rating on 1-9 Scale
Page 87 and 88: Table 9. Contd. Entry Origin Rating
Page 89 and 90: Table 10 Differential reaction of s
Page 91 and 92: 82 1069, 1467, 1591 were found resi
Page 93 and 94: 84 ing of the remaining collections
Page 95 and 96: 86 AUJLA, S.S. 1964. Study of eleve
Page 97 and 98: Proceedings ofthe Workshop on Ascac
Page 99 and 100: Parents diallel cross F1 diallel cr
Page 101 and 102: R.Pieters Malic acid is known to ha
Page 103 and 104: 96 (Hawtin and Singh 1983). Asv.-,h
Page 105 and 106: 98 3. Identification of as many sou
Page 107 and 108: 100 Germ. Evaluation Disease Res. M
Page 109 and 110: 102 Robinson (1976) has further dev
Page 111 and 112: 104 and by the time a multilinc cul
Page 113 and 114: 106 lines will then be made availab
Page 115 and 116: 108 GILL, K.S., NANDA, G.S., SINGH,
Page 117 and 118: 110 the program for the development
Page 119 and 120: 112 where they are not present. See
Page 121 and 122: 114 cides have been found to be eff
Page 123 and 124: 116 indicates that this propagate i
Page 125 and 126: 118 Great care must be exercised in
Page 127 and 128: 120 nature. Ascochyta propagules on
Page 129 and 130: 122 ZACHOS, D.G., PANAGOPOULOS, C.G
Page 131 and 132: 124 0 40 g30 Max 30 20. .,,10 Min ,
Page 133 and 134: 126 ranged from November 22, 1978 t
Page 135 and 136: 128 Genotypes Table 2 Grain yield o
Page 137: 130 Response to Plant Population Th
Page 141 and 142: 134 Data in Tab. 5 emphasize the im
Page 143 and 144: 136 appears adequate, therefore no
Page 145 and 146: 138 Discussion F. EI-Sayed I am ass
Page 147 and 148: Proceedings of the Workshop on Asco
Page 149 and 150: Table I The timing of reproductive
Page 151 and 152: Table 3 Accumulated water use by sp
Page 153 and 154: Es x (1 - a) x Eo t where t is the
Page 155 and 156: BRIDA cm Water /Depth Interva', 3 4
Page 157 and 158: crops extended deeper than under wi
Page 159 and 160: (as at Jindiress), the winter-sown
Page 161 and 162: eduction in the size of the crop's
Page 163 and 164: Discussion G.C. Hawtin You raised a
Page 165 and 166: Table I Nodutation and total drymat
Page 167 and 168: 162 Inoculation with single strain
Page 169 and 170: 164 These results indicate that pho
Page 171 and 172: 166 T.S. Sandhu Is there any techni
Page 173 and 174: 168 April for Tal Abaid (36*42'N, 3
Page 175 and 176: 170 At the end of the severe cold p
Page 177 and 178: 172 Table 4 Origin of lines having
Page 179 and 180: 174 stage (Tab. 6). Of the five cul
Page 181 and 182: 176 HERZOG, H. 1978. Wachsturnsverh
Page 183 and 184: Proeedings of the Workshop on Ascoc
Page 185 and 186: There is little information availab
Page 187 and 188: of the major and minor pests in thi
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attack any other important crop pla
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KAY, D.E. 1979. Food Legumes - Crop
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190 On the other hand, two items th
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192 M.V. Reddy It looks as if the c
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Country World ICARDA region Algeria
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196 Table 2a Export of chickpeas by
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198 India, Saudi Arabia, Venezuela
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Proceedings ofthe Workshop on Ascoc
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Chickpea Cultivation 203 In Syria m
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Table 2 Comparison of the growth, s
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Proceedings of the Workshop on Asco
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Excessive postharvest losses. Posth
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Seedbed preparation is very minimal
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carried out at the same time with w
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Table 4 Topographical classificatio
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were absorbed by the canning indust
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223 The advantages of winter sowing
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226 cultivars which could be plante
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Table 2 Area, production and yicld
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233 Threshing is mostly done by bul
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182, 192,'194,1069, 1772,3279,2380,
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238 4. Mycosphaerella pinodes and A
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240 Kausar (1960) discussed the rea
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242 Date Tale 2 Maximum temperature
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244 Table 4 Maximum temperature and
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soil moisture and therefore it is a
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Table 2 Characteristics of chickpea
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253 Table 5 Results of a trial on w
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Conclusion Chickpea in Tunisia has
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260 however, remained almost static
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262 Agricultural Universities and s
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264 greatest at flowering and fruit
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266 Basis of Resistance Kunzru and
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268 Discussion M. Aslain What is yo
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270 vars. It was assumed that the d
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Proceedings of the Workshop an Asco
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0- 400 ha ® Em 401 -1000 ha 1001 -
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277 Castille and even (1500 kg/ha)
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Table 3 'Rabia' attacks - environme
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would be pure extension. Diffusion
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284 7. The role of crop debris as a
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286 involving only a few treatments
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288 MAKKOUK, Khalid, Faculty of Agr
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