Submitted by admin on April 23, 2009 - 00:43
Initial Rates of Application
Recommended rates of application of superphosphate needed to obtain vigorous initial growth of pasture sown on cultivated but previously unimproved land are approximately as follows:
-
Rainfall 40 in. – 200 in.
-
poor initial phosphorus fertility, 6–9 cwt/acre.
-
medium initial phosphorus fertility, 3–5 cwt/acre.
-
-
Rainfall 30 in. – 40 in.
-
poor initial phosphorus fertility, 3–5 cwt/acre.
-
medium initial phosphorus fertility, 2–3 cwt/acre.
-
-
Rainfall 15 in. – 30 in.
-
poor initial phosphorus fertility, 3–5 cwt/acre.
-
medium initial phosphorus fertility, 1–2 cwt/acre.
-
Where unimproved phosphate-deficient pasture containing little clover is oversown with clover seeds, initial rates of application of phosphatic fertilisers seldom need to exceed 3–4 cwt/acre because heavier rates cannot be utilised fully straight away. It is usually important, however, to consolidate pasture improvement by regular annual dressings for several years.