F. V. Widdowson

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Side-placing urea and other nitrogen fertilizers for spring barley

R. Williams, F. V. Widdowson, A. Penny, 1964, The Journal of Agricultural Science.

P. J. Welbank, F. V. Widdowson, G. N. Thorne, 1980 .

Relationship between N concentration of grain and grain yield in recent winter-wheat experiments in England and Belgium, some with large yields

R. J. Darby, P. C. Lane, F. V. Widdowson, 1983 .

Variation between years in growth and nutrient uptake after anthesis of winter wheat on Broadbalk field at Rothamsted, 1969–84

R. J. Darby, P. W. Lane, W. Day, 1988, The Journal of Agricultural Science.

Uptake of phosphorus from P32-labelled superphosphate by field crops

F. V. Widdowson, G. E. G. Mattingly, 1958, Plant and Soil.

The effects of three crops and of the N fertilizer given to them on the yield of following barley

F. V. Widdowson, A. Penny, 1970, The Journal of Agricultural Science.

Comparison of the effects of aqueous and of prilled urea, used alone or with urease or nitrification inhibitors, with those of ‘Nitro-Chalk’ on ryegrass leys

F. V. Widdowson, A. Penny, G. Rodgers, 1984, The Journal of Agricultural Science.

Contrast between sandy and clay soils in the effects of various factors on the growth, nitrogen uptake and yield of winter wheat in three years

A. Todd, A. H. Weir, P. J. Welbank, 1988, The Journal of Agricultural Science.

Spring top-dressings of ‘Nitro-Chalk’ and late sprays of a liquid N-fertilizer and a broad spectrum fungicide for consecutive crops of winter wheat at Saxmundham, Suffolk

J. Jenkyn, F. V. Widdowson, A. Penny, 1978, The Journal of Agricultural Science.

Results from two barley experiments at Saxmundham, Suffolk, measuring effects of the fungicide benodanil on three varieties, given three amounts of nitrogen at two times 1973–4

J. Jenkyn, F. V. Widdowson, A. Penny, 1976, The Journal of Agricultural Science.

Results from experiments measuring the effects of large amounts of an NPK fertilizer on yield, tuber size and N, P and K contents of three potato varieties

F. V. Widdowson, A. Penny, 1975, The Journal of Agricultural Science.

Experiments comparing the effects on yields of potatoes of three methods of applying three amounts of NPK fertilizer and the residual effects on following winter wheat

R. Williams, F. V. Widdowson, A. Penny, 1967, The Journal of Agricultural Science.

Experiments measuring the residual effects of nitrogen fertilizers

F. V. Widdowson, A. Penny, 1965, The Journal of Agricultural Science.

Field experiments on phosphate fertilizers: A joint investigation

G. W. Cooke, F. V. Widdowson, 1956, The Journal of Agricultural Science.

Residual value of superphosphate and rock phosphate on an acid soil I. Yields and phosphorus uptakes in the field

F. V. Widdowson, G. E. G. Mattingly, 1963, The Journal of Agricultural Science.

Uptake of phosphorus from P32-labelled superphosphate by field crops

F. V. Widdowson, G. E. G. Mattingly, 1958, Plant and Soil.

An experiment begun in 1958 measuring effects of N, P and K fertilizers on yield and N, P and K contents of grass:1. Effects during 1964–7

R. Williams, F. V. Widdowson, A. Penny, 1980, The Journal of Agricultural Science.

The value of nitrophosphate for spring-sown cereals

G. W. Cooke, F. V. Widdowson, 1956, The Journal of Agricultural Science.

The value of calcium nitrate and urea for main-crop potatoes and kale

G. W. Cooke, F. V. Widdowson, A. Penny, 1960, The Journal of Agricultural Science.

Results of an experiment at Woburn testing farmyard manure and N, P and K fertilizers on five arable crops and on a long ley:II. N, P and K removed by the crops

F. V. Widdowson, A. Penny, R. Williams, 1967, The Journal of Agricultural Science.

Results of an experiment at Woburn testing farmyard manure and N, P and K fertilizers on five arable crops and a long ley:I. Yields

F. V. Widdowson, A. Penny, 1967, The Journal of Agricultural Science.

Effects of seven factors on the growth and yield of winter barley grown as a third consecutive take-all susceptible crop and of growing the barley after oats or a fallow

R. J. Darby, J. Jenkyn, A. Todd, 1992, The Journal of Agricultural Science.

The effects of sowing date and other factors on growth, yield and nitrogen uptake, and on the incidence of pests and diseases, of winter barley at rothamsted from 1981 to 1983

R. J. Darby, G. C. Scott, D. Lawlor, 1986, The Journal of Agricultural Science.

Results of an experiment at Rothamsted testing farmyard manure and N, P and K fertilizers on five arable crops I. Yields

G. W. Cooke, F. V. Widdowson, A. Penny, 1963, The Journal of Agricultural Science.

Effects of fertilisers and farmyard manure on the copper, manganese, molybdenum and zinc removed by arable crops at Rothamsted

G. W. Cooke, F. V. Widdowson, R. Williams, 1960 .

An experiment measuring effects of N, P and K fertilizers on yield and N, P and K contents of grazed grass

F. V. Widdowson, A. Penny, R. Williams, 1965, The Journal of Agricultural Science.

Experiments measuring effects of ammonium and nitrate fertilizers, with and without sodium and potassium, on spring barley

F. V. Widdowson, A. Penny, R. Williams, 1967, The Journal of Agricultural Science.

The relationship of soil mineral NO3-N with stem NO3-N concentration, and of fertilizer-N with the amount of nitrogen taken up by winter wheat, in experiments testing nitrogen fertilizer in combination with aphicide and fungicides, from 1980 to 1982

R. J. Darby, F. V. Widdowson, M. V. Hewitt, 1986, The Journal of Agricultural Science.

Results from experiments measuring the effects of large amounts of fertilizer and of farmyard manure on main-crop potatoes grown in sandy soil at Woburn, Bedfordshire

F. V. Widdowson, A. Penny, R. Flint, 1974, The Journal of Agricultural Science.

Amounts of NO3-N and NH4-N in soil, from autumn to spring, under winter wheat and their relationship to soil type, sowing date, previous crop and N uptake at Rothamsted, Woburn and Saxmundham, 1979–85

R. J. Darby, F. V. Widdowson, A. Penny, 1987, The Journal of Agricultural Science.

Experiments comparing yield, and residual effects on winter wheat, of 1-year clover, rye-grass and clover-rye-grass leys

F. V. Widdowson, A. Penny, R. Williams, 1963, Journal of Agricultural Sciences.

Applying nitrogen fertilizers for spring barley

F. V. Widdowson, A. Penny, R. Williams, 1961, The Journal of Agricultural Science.

Nitrogen fertilizers for spring barley and wheat

G. W. Cooke, F. V. Widdowson, 1958, The Journal of Agricultural Science.

Applying fertilizers for spring barley

F. V. Widdowson, 1962 .

Autumn nitrogen for winter wheat

F. V. Widdowson, A. Penny, R. Williams, 1961, The Journal of Agricultural Science.

The effects of nitrogen upon three stiff-strawed winter wheat varieties

F. V. Widdowson, 1959, The Journal of Agricultural Science.

An experiment begun in 1958 measuring effects of N, P and K fertilizers on yield and N, P and K contents of grass:2. Residual effects on arable crops, 1968–76

F. V. Widdowson, A. Penny, 1980, The Journal of Agricultural Science.

Results from factorial experiments testing amounts and times of granular N-fertilizer, late sprays of liquid N-fertilizer and fungicides to control mildew and brown rust on two varieties of spring barley at Saxmundham, Suffolk 1975–8

J. Jenkyn, F. V. Widdowson, A. Penny, 1982, The Journal of Agricultural Science.

Results from experiments on winter barley measuring the effects of amount and timing of nitrogen and some other factors on the yield and nitrogen content of the grain

J. Jenkyn, F. V. Widdowson, A. Penny, 1986, The Journal of Agricultural Science.

Results from two sets of experiments with spring barley, the first comparing injected with broadcast nitrogen granules, the second comparing injected and combine-drilled NPK solutions with broadcast NPK granules

F. V. Widdowson, A. Penny, 1977, The Journal of Agricultural Science.

Experiments with urea on spring barley.

F. V. Widdowson, A. Penny, 1960 .

Multifactorial experimentation on continuous winter wheat grown in sandy clay soil at Saxmundham, Suffolk

A. Johnston, F. V. Widdowson, A. Penny, 1980, The Journal of Agricultural Science.

Experiments with solid and liquid N-fertilizers and fungicides on winter wheat at Saxmundham, Suffolk, 1976–9

J. Jenkyn, F. V. Widdowson, A. Penny, 1983, Journal of Agricultural Sciences.

Results from experiments comparing aqueous and anhydrous ammonia with ‘nitro-chalk’ for grass cut for silage

F. V. Widdowson, A. Penny, R. Flint, 1973, The Journal of Agricultural Science.

Results from an experiment comparing aqueous ammonia with ‘Nitro-Chalk’ for grazed grass

F. V. Widdowson, A. Penny, R. Flint, 1972, The Journal of Agricultural Science.

Effects of several nitrification inhibitors, when injected with aqueous urea, on yields and nitrogen recoveries of ryegrass leys

F. V. Widdowson, A. Penny, G. Rodgers, 1983, Journal of Agricultural Sciences.

The effects of injecting nitrapyrin ('N-Serve'), carbon disulphide or trithiocarbonates, with aqueous ammonia, on yield and % N of grass.

G. Briggs, F. V. Widdowson, A. Penny, 1980 .

Tests of nitrification and of urease inhibitors, when applied with either solid or aqueous urea, on grass grown on a light sandy soil

F. V. Widdowson, A. Penny, G. Rodgers, 1987, The Journal of Agricultural Science.

Results from an experiment on permanent grass evaluating the cumulative effects of aqueous urea, injected alone or with a nitrification inhibitor, with those of ‘Nitro-Chalk’

R. Hodgkinson, F. V. Widdowson, A. Penny, 1982, The Journal of Agricultural Science.

Results from an experiment on permanent grass evaluating aqueous ammonia and aqueous urea, injected in bands either 30 or 60 cm apart

F. V. Widdowson, A. Penny, J. Ashworth, 1977, The Journal of Agricultural Science.

Comparisons between the establishment, growth and yield of winter wheat on three clay soils, in experiments testing nitrogen fertilizer in combination with aphicide and fungicides, from 1980 to 1982

R. J. Darby, F. V. Widdowson, M. Hewitt, 1984, The Journal of Agricultural Science.