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Seed dormancy is common in some species and ‘primary’ dormancy (sometimes called post-harvest dormancy) is usually associated with either the physical structures that surround the seed (lemma, palea and glumes) preventing moisture reaching the seed, or chemical inhibition that declines with time, or mechanisms within the embryo. As a result, seed samples can . . . → Read More: High Rainfall Perennial Grass- Seed Dormancy Successful establishment of sown tropical perennial grass pastures is highly dependent on the quality of the seed sown. Quality can vary markedly, so you need to know what you are buying – often it is a case of ‘buyer beware’. Always ask for a copy of a current certificate of seed analysis for the . . . → Read More: Tropical Perennial Grasses- High Rainfall Areas The first grazing of perennial ryegrass should be delayed until seedlings are firmly established and feed-on-offer has reached about 1800 kg DM/ha to avoid stock pulling plants out of the ground. Use a heavy stocking rate for a short period to promote the development of new tillers and graze down to ~1200 kg DM/ha. . . . → Read More: Management Of Perennial Ryegrass In High Rainfall Features: highly nutritious and palatable perennial grass with good management can be very productive in suitable environments excellent seedling vigour high temperatures constrain summer growth low drought tolerance, so best suited to fertile soils (>600 mm) requires rotational grazing for persistence, high yields and to maintain nutritional quality. Perennial ryegrass is one of the . . . → Read More: Perennial Ryegrass For High Rainfall Areas Reduced evaporation: Autumn weather may have periods of drying conditions following autumn rains. The dry periods can be severe enough to allow evaporation to drought and kill young seedlings. Evaporation may be reduced in furrow-sown water repellent sands because the dry centres of ridges and inter-row soils can form an intermittent dry mulch . . . → Read More: The Risks Of Furrow Sowing With Perennial Pastures Practices to avoid when furrow sowing: Top-dressing all fertilisers before seeding with points or blades. The fertiliser can be lockedup in thrown ridges and less available in dry seasons. Using simazine-diflufenican mixtures post emergence on lupins. Metribuzin/ diflufenican causes less crop damage. Using shallow duplex soils which are prone to waterlogging, especially on the . . . → Read More: Furrow Sowing For Improved Crops And Perennial Pastures On Water Repellent Soils |
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