Nitrate accumulation in smooth bromegrass as influenced by applied fertilizer and environmental conditions

Accumulation of nitrate nitrogen and other mineral nutrients in sudangrass as affected by applied nitrogen and iron

“…Applications as great as or greater than 200 pounds nitrogen per acre resulted in potentially toxic levels of nitrate in the forage. Vanderlip (1965) agreed with Hanway and Moldenhauer (1965) Sorghums, which include sudangrass, have been found to be high in nitrates by Case (1957) and by Hanway and Englehorn (1958)' Sudangrass, in particular, seems to accumulate nitrates easily. Murphy andSmith (1967), McCreery ^ al.…”

Yield and chemical composition of Dactylis glomerata as influenced by genotype and management

“…By setting the partial derivative of equation 11 with respect to N equal to the price ratio of N to beef, a, the optimum amount of N to use can be found. Table 42 shows may or may not be toxic; however, it is above the 0,21# NCy-N level as discussed by Vanderlip (1965).…”

“…Previous work by Walker (I96I) and Vanderlip (1965) Obviously, then, the potential total number of terms representing inde pendent variables involved in an experiment such as this is large.…”

Yield and chemical composition of Dactylis glomerata as influenced by genotype and management

“…By setting the partial derivative of equation 11 with respect to N equal to the price ratio of N to beef, a, the optimum amount of N to use can be found. Table 42 shows the optimum amount of N, gross and predicted net returns for may or may not be toxic; however, it is above the 0,21# NCy-N level as discussed by Vanderlip (1965).…”

“…A 7x7x7 central composite design used by Walker (I96I) and Vanderlip (1965) seemed appropriate because these NPK studies had objectives of determining amounts of N, P and K to use for economic forage production plus monitoring the NO^-N content of the forage. In addition to the 23 combinations of N, P and K in the original design, 9 of the treabments (those containing 120 and 180 kilograms per hectare of N) were reapplied at the time the first harvest was taken.…”