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lethal water deficit

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Catalogue: GRDC Updates
Sowing opportunities were assessed for each day in the sowing season based on PASW% of seedbed [0-100mm depth] or topsoil [0-200mm depth]... Seedling performance was assessed for each sowing opportunity by counting the days between germination (dry sown) or sowing (moist sown) and July 19 when seedlings were exposed to lethal or disabling topsoil [0-200mm] conditions ( Table 1 )... In 50% of years the first opportunity occurs before early May and 10 days of sowing will have been achieved by early June ( Table 3 )...
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Catalogue: GRDC Updates (West)
Seedling performance was assessed for each sowing opportunity by counting the days between germination (dry sown) or sowing (moist sown) and July 19 when seedlings were exposed to lethal or disabling topsoil [0-200mm] conditions (Table 1)... In 50% of years the first opportunity occurs before late April-early May and 10 days of sowing have been achieved by mid-late May. Exposure to disabling water deficits is more frequent and of longer duration than moist-wet seedbed sowings whilst exposure to lethal deficits is similar (sand) or slightly reduced (loamy duplex soil)... Exposure to water deficit 2 1 Dry sowing: start 10 April, water deficit assessed after germination day 2 Moist sowing: start 20 April, water deficit assessed after sowing day 3 Gd10, date of germination following 10 days of dry sowing..
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Catalogue: GRDC Updates (West)
P4/S9 and P2/S4 were the two most profitable sequences and, overall, the 'maximum profit - P4' philosophy had the highest mean gross margin... It is logical that those growers that have chosen to have no livestock will have no interest in trialling grazing crops... Overall, the data has indicated that for the biserrula inoculant all of the carrier's have difficulties in carrying enough live rhizobia numbers to adequately nodulate the legume hosts after 3-4 months of dry, hot soil...
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