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Arable Farming
Cropping
Poly N Plus
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<blockquote data-quote="yellow belly" data-source="post: 7395529" data-attributes="member: 305"><p>the problem with all reductions in n from the optimum is that eventually the protein content of the wheat will be lower </p><p></p><p>so milling wheat for bread or biscuits will be come harder to meet the spec </p><p></p><p>with optimum rates for yield the last 30 kg of n does not increase yield very much but does pay a return</p><p></p><p>with the products that give a small amount of n replacing a bigger amount of fertiliser n </p><p>if the yield stays up there will be less n in the system </p><p>either grain n falls or the n in the crop residue left in the field is lower </p><p></p><p>this will eventually lead to lower amounts of n in the soil </p><p></p><p>i have found on my heavy land over the last 40 years that increasing yields continuous cropping no manure the amount of n available from the soil has reduced less lush forward crops in the autumn is a sign hard to make 13% milling wheat </p><p>there is only so much organic matter in the soil and eventually with out enough n it will reduce to very low levels </p><p></p><p>products may maintain the yield by utilising the n that comes from the surplas organic matter in the soil with a soil that has not had years of intensive cropping</p></blockquote><p></p>
[QUOTE="yellow belly, post: 7395529, member: 305"] the problem with all reductions in n from the optimum is that eventually the protein content of the wheat will be lower so milling wheat for bread or biscuits will be come harder to meet the spec with optimum rates for yield the last 30 kg of n does not increase yield very much but does pay a return with the products that give a small amount of n replacing a bigger amount of fertiliser n if the yield stays up there will be less n in the system either grain n falls or the n in the crop residue left in the field is lower this will eventually lead to lower amounts of n in the soil i have found on my heavy land over the last 40 years that increasing yields continuous cropping no manure the amount of n available from the soil has reduced less lush forward crops in the autumn is a sign hard to make 13% milling wheat there is only so much organic matter in the soil and eventually with out enough n it will reduce to very low levels products may maintain the yield by utilising the n that comes from the surplas organic matter in the soil with a soil that has not had years of intensive cropping [/QUOTE]
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Poly N Plus
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